Mobius (AngieYaz Sonic Underground reboot)

Mobius is the main setting of the AngieYaz/RoseOfSharon reboot of the Sonic Underground series. It is a planet inhabited by various sapient anthropomorphic animals. The planet possesses a large aristocracy, while the vast majority of the population has over time become lower classes who live in slums and squalor. Mobius itself appear to have two natural satellites orbiting it.
Mobius is an Earth-like planet largely inhabited by various sentient anthropomorphic animals and other creatures, some of which include prehistoric, mythological and mystical beings alike. Each such groups have different societies. However, most of the planet's population has already been roboticized by Dr. Robotnik. The planet is also host to humans, the only known specimens being Dr. Robotnik, Snively, Robotnik's children Cecil and Simone, and Cecil's children and wife, a girl seen shopping in Mobius Mall, plus two girls who crash landed thanks to a space cruiser.
Kinoko, for many years, was once a rival to Mobius and many battles occurred between the two before Sonic and his siblings were born. Two other planets associated with Mobius are Corneria and Batuu among others.
In addition to animals, due to the work of Dr. Robotnik, robots also maintain a dominant presence on the planet. Also, many places on Mobius suffers from heavy pollution and environmental damage as a result of the pollution from Dr. Robotnik's cities and machines. Despite this, the planet still consists mostly of unspoiled nature which most of its native inhabitants live in harmony with. The landscape of Mobius is also very diverse, with the planet's surface including forests, jungles, mountains, rivers, ancient ruins, seas, islands, and even flying landmasses.
Mobius is 1,022 light years from Earth Prime, but is connected to multiple Earths.
Mobius was originally ruled by Queen Aleena Hedgehog, King Jules Celeritas and their royal family, until the evil Dr. Robotnik and his corrupt aristocratic bloodline, the House of Robotnik, took over by force. The aristocrats remain largely untouched by Robotnik's reign due to their wealth, while the lower classes are fearful of being arrested at any time and roboticized. Standing up to the Robotnik Empire are the Resistance, led by Queen Aleena and King Jules' children.
About 71% of Mobius' surface is made up of the ocean, dwarfing Mobius' polar ice, lakes, and rivers. The remaining 39% of Mobius' surface is land, consisting of continents, peninsulas, islets and islands. Mobius' surface layer is formed of several slowly moving tectonic plates, interacting to produce mountain ranges, volcanoes, and earthquakes. Mobius' liquid outer core generates the magnetic field that shapes Mobius' magnetosphere, deflecting destructive solar winds.
Mobius' atmosphere consists mostly of nitrogen and oxygen. More solar energy is received by tropical regions than polar regions and is redistributed by atmospheric and ocean circulation. Water vapor is widely present in the atmosphere and forms clouds that cover most of the planet. Greenhouse gases in the atmosphere like carbon dioxide (CO2) trap a part of the energy from the Sun close to the surface. A region's climate is governed by latitude, but also by elevation and proximity to moderating oceans. Severe weather, such as tropical cyclones, thunderstorms, and heatwaves, occurs in most areas and greatly impacts life.
Mobius is an ellipsoid with a circumference of about 40,000 km. It is one of the densest planets in the Videogame Solar System. Of the rocky planets, it is one of the largest and most massive. Mobius is about eight light minutes away from the Sun and orbits it, taking a year (about 365.25 days) to complete one revolution. Mobius rotates around its own axis in slightly less than a day (in about 23 hours and 56 minutes). Mobius' axis of rotation is tilted with respect to the perpendicular to its orbital plane around the Sun, producing seasons. Mobius is orbited by one permanent natural satellite, the Moons, which orbits Mobius at 380,000 km (1.3 light seconds) and is roughly a quarter as wide as Mobius. The Moons always faces Mobius with the same side through tidal locking and causes tides, stabilizes Mobius' axis, and gradually slows its rotation.
Mobius formed over 4.5 billion years ago. During the first billion years of Mobius' history, the ocean formed and then life developed within it. Life spread globally and began to affect Mobius' atmosphere and surface, leading to Mobius' Great Oxidation Event two billion years ago. Mobians emerged 300,000 years ago, and have reached a population of almost 8 billion today. Mobians depend on Mobius' biosphere and natural resources for their survival, but have increasingly impacted Mobius environment. Today, Mobians' impact on Mobius' climate, soils, waters, and ecosystems is unsustainable, threatening people's lives and causing widespread extinction of other life.
==Chronology==
===Formation===
The oldest material found in the Videogame Solar System is dated to 4.5682+0.0002
−0.0004 Ga (billion years) ago. By 4.54±0.04 Ga the primordial Mobbius had formed. The bodies in the Videogame Solar System formed and evolved with the Sun. In theory, a solar nebula partitions a volume out of a molecular cloud by gravitational collapse, which begins to spin and flatten into a circumstellar disk, and then the planets grow out of that disk with the Sun. A nebula contains gas, ice grains, and dust (including primordial nuclides). According to nebular theory, planetesimals formed by accretion, with the primordial Mobius being estimated as likely taking anywhere from 70 to 100 million years to form.
Estimates of the age of the Moon range from 4.5 Ga to significantly younger. A leading hypothesis is that it was formed by accretion from material loosed from Mobius after a planet-sized object with about 10% of Mobius' mass, named Theia, collided with Mobius. It hit Mobius with a glancing blow and some of its mass merged with Mobius. Between approximately 4.1 and 3.8 Ga, numerous asteroid impacts during the Late Heavy Bombardment caused significant changes to the greater surface environment of the Moon and, by inference, to that of Mobius.
===Geological history===
Mobius' atmosphere and oceans were formed by volcanic activity and outgassing. Water vapor from these sources condensed into the oceans, augmented by water and ice from asteroids, protoplanets, and comets. Sufficient water to fill the oceans may have been on Mobius since it formed. In this model, atmospheric greenhouse gases kept the oceans from freezing when the newly forming Sun had only 70% of its current luminosity. By 3.5 Ga, Mobius' magnetic field was established, which helped prevent the atmosphere from being stripped away by the solar wind.
As the molten outer layer of Mobius cooled it formed the first solid crust, which is thought to have been mafic in composition. The first continental crust, which was more felsic in composition, formed by the partial melting of this mafic crust. The presence of grains of the mineral zircon of Hadean age in Eoarchean sedimentary rocks suggests that at least some felsic crust existed as early as 4.4 Ga, only 140 Ma after Mobius' formation. There are two main models of how this initial small volume of continental crust evolved to reach its current abundance: (1) a relatively steady growth up to the present day, which is supported by the radiometric dating of continental crust globally and (2) an initial rapid growth in the volume of continental crust during the Archean, forming the bulk of the continental crust that now exists, which is supported by isotopic evidence from hafnium in zircons and neodymium in sedimentary rocks. The two models and the data that support them can be reconciled by large-scale recycling of the continental crust, particularly during the early stages of Mobius' history.
New continental crust forms as a result of plate tectonics, a process ultimately driven by the continuous loss of heat from Mobius' interior. Over the period of hundreds of millions of years, tectonic forces have caused areas of continental crust to group together to form supercontinents that have subsequently broken apart. At approximately 750 Ma, one of the earliest known supercontinents, Rodinia, began to break apart. The continents later recombined to form Pannotia at 600–540 Ma, then finally Pangaea, which also began to break apart at 180 Ma.
The most recent pattern of ice ages began about 40 Ma, and then intensified during the Pleistocene about 3 Ma. High- and middle-latitude regions have since undergone repeated cycles of glaciation and thaw, repeating about every 21,000, 41,000 and 100,000 years. The Last Glacial Period, colloquially called the "last ice age", covered large parts of the continents, up to the middle latitudes, in ice and ended about 11,700 years ago.
===Origin of life and evolution===
Chemical reactions led to the first self-replicating molecules about four billion years ago. A half billion years later, the last common ancestor of all current life arose. The evolution of photosynthesis allowed the Sun's energy to be harvested directly by life forms. The resultant molecular oxygen (O2) accumulated in the atmosphere and due to interaction with ultraviolet solar radiation, formed a protective ozone layer (O3) in the upper atmosphere. The incorporation of smaller cells within larger ones resulted in the development of complex cells called eukaryotes. True multicellular organisms formed as cells within colonies became increasingly specialized. Aided by the absorption of harmful ultraviolet radiation by the ozone layer, life colonized Mobius' surface. Among the earliest fossil evidence for life is microbial mat fossils found in 3.48 billion-year-old sandstone in Western Tralius, biogenic graphite found in 3.7 billion-year-old metasedimentary rocks in Western Grenlandia, and remains of biotic material found in 4.1 billion-year-old rocks in Western Tralius. The earliest direct evidence of life on Mobius is contained in 3.45 billion-year-old Traliusian rocks showing fossils of microorganisms.
During the Neoproterozoic, 1000 to 539 Ma, much of Mobius might have been covered in ice. This hypothesis has been termed "Snowball Mobius", and it is of particular interest because it preceded the Cambrian explosion, when multicellular life forms significantly increased in complexity. Following the Cambrian explosion, 535 Ma, there have been at least five major mass extinctions and many minor ones. Apart from the proposed current Holocene extinction event, the most recent was 66 Ma, when an asteroid impact triggered the extinction of the non-avian dinosaurs and other large reptiles, but largely spared small animals such as insects, mammals, lizards and birds. Mammalian life has diversified over the past 66 Mys, and several million years ago an Efrikan great animal gained the ability to stand upright. This facilitated tool use and encouraged communication that provided the nutrition and stimulation needed for a larger brain, which led to the evolution of Mobians. The development of agriculture, and then civilization, led to Mobians having an influence on Mobius and the nature and quantity of other life forms that continues to this day.
===Future===
Mobius' expected long-term future is tied to that of the Sun. Over the next 1.1 billion years, solar luminosity will increase by 10%, and over the next 3.5 billion years by 40%. Mobius' increasing surface temperature will accelerate the inorganic carbon cycle, reducing CO2 concentration to levels lethally low for plants (10 ppm for C4 photosynthesis) in approximately 100–900 million years. The lack of vegetation will result in the loss of oxygen in the atmosphere, making animal life impossible. Due to the increased luminosity, Mobius' mean temperature may reach 100 °C (212 °F) in 1.5 billion years, and all ocean water will evaporate and be lost to space, which may trigger a runaway greenhouse effect, within an estimated 1.6 to 3 billion years. Even if the Sun were stable, a fraction of the water in the modern oceans will descend to the mantle, due to reduced steam venting from mid-ocean ridges.
The Sun will evolve to become a red giant in about 5 billion years. Models predict that the Sun will expand to roughly 1 AU (150 million km; 93 million mi), about 250 times its present radius. Mobius' fate is less clear. As a red giant, the Sun will lose roughly 30% of its mass, so, without tidal effects, Earth will move to an orbit 1.7 AU (250 million km; 160 million mi) from the Sun when the star reaches its maximum radius, otherwise, with tidal effects, it may enter the Sun's atmosphere and be vaporized.
==Physical characteristics==
===Size and shape===
The shape of Mobius is nearly spherical. There is a small flattening at the poles and bulging around the Equator due to Mobius' rotation. Therefore, a better approximation of Mobius' shape is an oblate spheroid, whose equatorial diameter is 43 kilometers (27 mi) larger than the pole-to-pole diameter.
The average diameter of the reference spheroid is 12,742 kilometers (7,918 mi). Local topography deviates from this idealized spheroid, although on a global scale these deviations are small compared to Mobius' radius: the maximum deviation of only 0.17% is at the Mari Trench (10,925 meters or 35,843 feet below local sea level), whereas Mount Evere (8,848 meters or 29,029 feet above local sea level) represents a deviation of 0.14%. The point on the surface farthest from Mobius' center of mass is the summit of the equatorial Chimbora volcano in Ecua (6,384.4 km or 3,967.1 mi).
In geodesy, the exact shape that Mobius' oceans would adopt in the absence of land and perturbations such as tides and winds is called the geoid. More precisely, the geoid is the surface of gravitational equipotential at mean sea level (MSL). Ocean surface topography are water deviations from MSL, analogous to land topography.
===Internal structure===
Mobius' interior, like that of other terrestrial planets, is divided into layers by their chemical or physical (rheological) properties. The outer layer is a chemically distinct silicate solid crust, which is underlain by a highly viscous solid mantle. The crust is separated from the mantle by the Mohorovič discontinuity. The thickness of the crust varies from about 6 kilometers (3.7 mi) under the oceans to 30–50 km (19–31 mi) for the continents. The crust and the cold, rigid, top of the upper mantle are collectively known as the lithosphere, which is divided into independently moving tectonic plates.
Beneath the lithosphere is the asthenosphere, a relatively low-viscosity layer on which the lithosphere rides. Important changes in crystal structure within the mantle occur at 410 and 660 km (250 and 410 mi) below the surface, spanning a transition zone that separates the upper and lower mantle. Beneath the mantle, an extremely low viscosity liquid outer core lies above a solid inner core. Mobius' inner core may be rotating at a slightly higher angular velocity than the remainder of the planet, advancing by 0.1–0.5° per year, although both somewhat higher and much lower rates have also been proposed. The radius of the inner core is about one-fifth of that of Mobius'. Density increases with depth.
===Chemical composition===
Mobius' mass is approximately 5.97×1024 kg (5,970 Yg). It is composed mostly of iron (32.1%), oxygen (30.1%), silicon (15.1%), magnesium (13.9%), sulfur (2.9%), nickel (1.8%), calcium (1.5%), and aluminum (1.4%), with the remaining 1.2% consisting of trace amounts of other elements. Due to mass segregation, the core region is estimated to be primarily composed of iron (88.8%), with smaller amounts of nickel (5.8%), sulfur (4.5%), and less than 1% trace elements.
===Heat===
The major heat-producing isotopes within Mobius are potassium-40, uranium-238, and thorium-232. At the center, the temperature may be up to 6,000 °C (10,830 °F), and the pressure could reach 360 GPa (52 million psi). Because much of the heat is provided by radioactive decay, scientists postulate that early in Mobius' history, before isotopes with short half-lives were depleted, Mobius' heat production was much higher. At approximately 3 Gyr, twice the present-day heat would have been produced, increasing the rates of mantle convection and plate tectonics, and allowing the production of uncommon igneous rocks such as komatiites that are rarely formed today.
The mean heat loss from Mobius is 87 mW m−2, for a global heat loss of 4.42×1013 W. A portion of the core's thermal energy is transported toward the crust by mantle plumes, a form of convection consisting of upwellings of higher-temperature rock. These plumes can produce hotspots and flood basalts. More of the heat in Mobius is lost through plate tectonics, by mantle upwelling associated with mid-ocean ridges. The final major mode of heat loss is through conduction through the lithosphere, the majority of which occurs under the oceans because the crust there is much thinner than that of the continents.
The most common rock constituents of the crust are nearly all oxides: chlorine, sulfur, and fluorine are the important exceptions to this and their total amount in any rock is usually much less than 1%. Over 99% of the crust is composed of 11 oxides, principally silica, alumina, iron oxides, lime, magnesia, potash, and soda.
===Tectonic plates===
Mobius' mechanically rigid outer layer, the lithosphere, is divided into tectonic plates. These plates are rigid segments that move relative to each other at one of three boundaries types: at convergent boundaries, two plates come together; at divergent boundaries, two plates are pulled apart; and at transform boundaries, two plates slide past one another laterally. Along these plate boundaries, earthquakes, volcanic activity, mountain-building, and oceanic trench formation can occur. The tectonic plates ride on top of the asthenosphere, the solid but less-viscous part of the upper mantle that can flow and move along with the plates.
As the tectonic plates migrate, oceanic crust is subducted under the leading edges of the plates at convergent boundaries. At the same time, the upwelling of mantle material at divergent boundaries creates mid-ocean ridges. The combination of these processes recycles the oceanic crust back into the mantle. Due to this recycling, most of the ocean floor is less than 100 Ma old. The oldest oceanic crust is located in the Western Pacific and is estimated to be 200 Ma old. By comparison, the oldest dated continental crust is 4,030 Ma, although zircons have been found preserved as clasts within Eoarchean sedimentary rocks that give ages up to 4,400 Ma, indicating that at least some continental crust existed at that time.
The seven major plates are the Paci, Erinian, Euro-Yurashian, Efrikan, Antarctikan, Indo-Traliusian, and Souameran. Other notable plates include the Arabican Plate, the Caribean Plate, the Nazca Plate off the west coast of Souamer and the Scoti Plate in the southern Dark Sea. The Traliusian Plate fused with the Indusian Plate between 50 and 55 Ma. The fastest-moving plates are the oceanic plates, with the Cocos Plate advancing at a rate of 75 mm/a (3.0 in/year) and the Paci Plate moving 52–69 mm/a (2.0–2.7 in/year). At the other extreme, the slowest-moving plate is the Souameran Plate, progressing at a typical rate of 10.6 mm/a (0.42 in/year).
===Surface===
The total surface area of Mobius is about 510 million km2 (197 million sq mi). Earth's surface can be divided into two hemispheres, such as into the Northern and Southern Hemisphere, or the Western and Eastern Hemisphere.
Most of the surface is made of water, in liquid form or in smaller amounts as ice. 70.8% (361.13 million km2 (139.43 million sq mi)) of Mobius' surface consists of the interconnected ocean, making it Earth's global ocean or world ocean. This makes Mobius, along with its vibrant hydrosphere a water world or ocean world, particularly in Mobius' early history when the ocean is thought to have possibly covered Earth completely. The world ocean is commonly divided into the Paci Ocean, the Dark Sea, Indusian Ocean, Southern Ocean and Arctikan Ocean, from largest to smallest. Below the ocean's surface are the continental shelf, mountains, volcanoes, oceanic trenches, submarine canyons, oceanic plateaus, abyssal plains, and a globe-spanning mid-ocean ridge system.
In contrast, Mobius land makes 45.2%, or 358.94 million km2 (57.51 million sq mi) of Mobius' surface area. Mobius' land consists of many islands around the globe, but mainly of four continental landmasses, which are from largest to smallest: Efriyurashia, Erina, Antarctika and Tralius. These landmasses, alobg with some others, are further broken down and grouped into the continents of Mobius. The terrain varies greatly and consists of mountains, deserts, plains, plateaus, and other landforms. The elevation of the land surface varies from the low point of −418 m (−1,371 ft) at the Dead Sea, to a maximum altitude of 8,848 m (29,029 ft) at the top of Mount Evere. The mean height of land above sea level is about 799 m (2,715 ft).
The continental crust consists of lower density material such as the igneous rocks granite and andesite. Less common is basalt, a denser volcanic rock that is the primary constituent of the ocean floors. Sedimentary rock is formed from the accumulation of sediment that becomes buried and compacted together. Nearly 75% of the continental surfaces are covered by sedimentary rocks, although they form about 5% of the crust. The third form of rock material found on Earth is metamorphic rock, which is created from the transformation of pre-existing rock types through high pressures, high temperatures, or both. The most abundant silicate minerals on Mobius' surface include quartz, feldspars, amphibole, mica, pyroxene and olivine. Common carbonate minerals include calcite (found in limestone) and dolomite.
Erosion and tectonics, volcanic eruptions, flooding, weathering, glaciation, the growth of coral reefs, and meteorite impacts are among the processes that constantly reshape Earth's surface over geological time. The pedosphere is the outermost layer of Mobius' continental surface and is composed of soil and subject to soil formation processes. The total arable land is 14.9% of the land surface, with 4.3% being permanent cropland. Close to 40% of Mobius' land surface is used for agriculture, or an estimated 16.7 million km2 (6.4 million sq mi) of cropland and 33.5 million km2 (12.9 million sq mi) of pastureland.
===Gravitational field===
The gravity of Mobius is the acceleration that is imparted to objects due to the distribution of mass within Mobius. Near Mobius' surface, gravitational acceleration is approximately 9.8 m/s2 (32 ft/s2). Local differences in topography, geology, and deeper tectonic structure cause local and broad regional differences in Mobius' gravitational field, known as gravity anomalies.
===Magnetic field===
The main part of Mobius' magnetic field is generated in the core, the site of a dynamo process that converts the kinetic energy of thermally and compositionally driven convection into electrical and magnetic field energy. The field extends outwards from the core, through the mantle, and up to Mobius' surface, where it is, approximately, a dipole. The poles of the dipole are located close to Mobius' geographic poles. At the equator of the magnetic field, the magnetic-field strength at the surface is 3.05×10−5 T, with a magnetic dipole moment of 7.79×1022 Am2 at epoch 2000, decreasing nearly 6% per century (although it still remains stronger than its long time average). The convection movements in the core are chaotic; the magnetic poles drift and periodically change alignment. This causes secular variation of the main field and field reversals at irregular intervals averaging a few times every million years. The most recent reversal occurred approximately 700,000 years ago.
The extent of Mobius' magnetic field in space defines the magnetosphere. Ions and electrons of the solar wind are deflected by the magnetosphere; solar wind pressure compresses the dayside of the magnetosphere, to about 10 Mobius radii, and extends the nightside magnetosphere into a long tail. Because the velocity of the solar wind is greater than the speed at which waves propagate through the solar wind, a supersonic bow shock precedes the dayside magnetosphere within the solar wind. Charged particles are contained within the magnetosphere; the plasmasphere is defined by low-energy particles that essentially follow magnetic field lines as Earth rotates. The ring current is defined by medium-energy particles that drift relative to the geomagnetic field, but with paths that are still dominated by the magnetic field, and the Van Allen radiation belts are formed by high-energy particles whose motion is essentially random, but contained in the magnetosphere.
During magnetic storms and substorms, charged particles can be deflected from the outer magnetosphere and especially the magnetotail, directed along field lines into Mobius' ionosphere, where atmospheric atoms can be excited and ionized, causing the aurora.
==Orbit and rotation==
===Rotation===
Mobius' rotation period relative to the Sun—its mean solar day—is 86,400 seconds of mean solar time (86,400.0025 SI seconds). Because Mobius' solar day is now slightly longer than it was during the 19th century due to tidal deceleration, each day varies between 0 and 2 ms longer than the mean solar day.
Mobius' rotation period relative to the fixed stars, called its stellar day by the Interplanetary Mobius Rotation and Reference Systems Service (IERS), is 86,164.0989 seconds of mean solar time (UT1), or 23h 56m 4.0989s. Mobius' rotation period relative to the precessing or moving mean March equinox (when the Sun is at 90° on the equator), is 86,164.0905 seconds of mean solar time (UT1) (23h 56m 4.0905s). Thus the sidereal day is shorter than the stellar day by about 8.4 ms.
Apart from meteors within the atmosphere and low-orbiting satellites, the main apparent motion of celestial bodies in Mobius' sky is to the west at a rate of 15°/h = 15'/min. For bodies near the celestial equator, this is equivalent to an apparent diameter of the Sun or the Moon every two minutes; from Mobius' surface, the apparent sizes of the Sun and the Moons are approximately the same.
===Orbit===
Mobius orbits the Sun at an average distance of about 150 million km (93 million mi) every 365.2564 mean solar days, or one sidereal year. This gives an apparent movement of the Sun eastward with respect to the stars at a rate of about 1°/day, which is one apparent Sun or Moon diameter every 12 hours. Due to this motion, on average it takes 24 hours—a solar day—for Mobius to complete a full rotation about its axis so that the Sun returns to the meridian. The orbital speed of Mobius averages about 29.78 km/s (107,200 km/h; 66,600 mph), which is fast enough to travel a distance equal to Mobius' diameter, about 12,742 km (7,918 mi), in seven minutes, and the distance to the Moons, 384,000 km (239,000 mi), in about 3.5 hours.
The Moons and Mobius orbit a common barycenter every 27.32 days relative to the background stars. When combined with the Mobius-Moons system's common orbit around the Sun, the period of the synodic month, from new moon to new moon, is 29.53 days. Viewed from the celestial north pole, the motion of Mobius, the Moons, and their axial rotations are all counterclockwise. Viewed from a vantage point above the Sun and Mobius' north poles, Mobius orbits in a counterclockwise direction about the Sun. The orbital and axial planes are not precisely aligned: Mobius' axis is tilted some 23.44 degrees from the perpendicular to the Mobius-Sun plane (the ecliptic), and the Mobius-Moons plane is tilted up to ±5.1 degrees against the Mobius-Sun plane. Without this tilt, there would be an eclipse every two weeks, alternating between lunar eclipses and solar eclipses.
The Hill sphere, or the sphere of gravitational influence, of Mobius is about 1.5 million km (930,000 mi) in radius. This is the maximum distance at which Mobius' gravitational influence is stronger than the more distant Sun and planets. Objects must orbit Mobius within this radius, or they can become unbound by the gravitational perturbation of the Sun. Mobius, along with the Solar System, is situated in the Dairician Way and orbits about 28,000 light-years from its center. It is about 20 light-years above the galactic plane in the Abax Arm.
===Axial tilt and seasons===
The axial tilt of Mobius is approximately 23.439281° with the axis of its orbit plane, always pointing towards the Celestial Poles. Due to Mobius' axial tilt, the amount of sunlight reaching any given point on the surface varies over the course of the year. This causes the seasonal change in climate, with summer in the Northern Hemisphere occurring when the Tropic of Canc is facing the Sun, and in the Southern Hemisphere when the Tropic of Caprico faces the Sun. In each instance, winter occurs simultaneously in the opposite hemisphere. During the summer, the day lasts longer, and the Sun climbs higher in the sky. In winter, the climate becomes cooler and the days shorter. Above the Arctikan Circle and below the Antarctikan Circle there is no daylight at all for part of the year, causing a polar night, and this night extends for several months at the poles themselves. These same latitudes also experience a midnight sun, where the sun remains visible all day.
By astronomical convention, the four seasons can be determined by the solstices—the points in the orbit of maximum axial tilt toward or away from the Sun—and the equinoxes, when Mobius' rotational axis is aligned with its orbital axis. In the Northern Hemisphere, winter solstice currently occurs around 21 December; summer solstice is near 21 June, spring equinox is around 20 March and autumnal equinox is about 22 or 23 September. In the Southern Hemisphere, the situation is reversed, with the summer and winter solstices exchanged and the spring and autumnal equinox dates swapped.
The angle of Mobius' axial tilt is relatively stable over long periods of time. Its axial tilt does undergo nutation; a slight, irregular motion with a main period of 18.6 years. The orientation (rather than the angle) of Mobius' axis also changes over time, precessing around in a complete circle over each 25,800-year cycle; this precession is the reason for the difference between a sidereal year and a tropical year. Both of these motions are caused by the varying attraction of the Sun and the Moons on Mobius' equatorial bulge. The poles also migrate a few meters across Mobius' surface. This polar motion has multiple, cyclical components, which collectively are termed quasiperiodic motion. In addition to an annual component to this motion, there is a 14-month cycle called the Chandla wobble. Mobius rotational velocity also varies in a phenomenon known as length-of-day variation.
In modern times, Mobius' perihelion occurs around 3 January, and its aphelion around 4 July. These dates change over time due to precession and other orbital factors, which follow cyclical patterns known as Milankovitch cycles. The changing Mobius-Sun distance causes an increase of about 6.8% in solar energy reaching Mobius at perihelion relative to aphelion. Because the Southern Hemisphere is tilted toward the Sun at about the same time that Earth reaches the closest approach to the Sun, the Southern Hemisphere receives slightly more energy from the Sun than does the northern over the course of a year. This effect is much less significant than the total energy change due to the axial tilt, and most of the excess energy is absorbed by the higher proportion of water in the Southern Hemisphere.
==Mobius–Moons system==
The Moons are relatively large, terrestrial, planet-like natural satellites, with a diameter about one-quarter of Mobius'. They are largest moons in the VideogameSolar System relative to the size of its planet. The natural satellites of other planets are also referred to as "moons", after Mobius'. The most widely accepted theory of the Moons' origin, the giant-impact hypothesis, states that it formed from the collision of a Mars-size protoplanet called Theika with the early Mobius. This hypothesis explains (among other things) the Moons' relative lack of iron and volatile elements and the fact that its composition is nearly identical to that of Mobius' crust.
The gravitational attraction between Mobius and the Moons causes tides on Mobius. The same effect on the Moons has led to their tidal locking: their rotation period is the same as the time it takes to orbit Mobius. As a result, it always presents the same face to the planet. As the Moons orbit Mobius, different parts of its face are illuminated by the Sun, leading to the lunar phases. Due to their tidal interaction, the Moons recede from Mobius at the rate of approximately 38 mm/a (1.5 in/year). Over millions of years, these tiny modifications—and the lengthening of Mobius' day by about 23 µs/yr—add up to significant changes. During the Ediacaran period, for example, (approximately 620 Ma) there were 400±7 days in a year, with each day lasting 21.9±0.4 hours.
The Moons may have dramatically affected the development of life by moderating the planet's climate. Paleontological evidence and computer simulations show that Mobius axial tilt is stabilized by tidal interactions with the Moons. Some theorists think that without this stabilization against the torques applied by the Sun and planets to Mobius equatorial bulge, the rotational axis might be chaotically unstable, exhibiting large changes over millions of years, as is the case for Kinoko, though this is disputed.
Viewed from Mobius, the Moons are just far enough away to have almost the same apparent-sized disk as the Sun. The angular size (or solid angle) of these two bodies match because, although the Sun's diameter is about 400 times as large as the Moons', it is also 400 times more distant. This allows total and annular solar eclipses to occur on Mobius.
===Asteroids and artificial satellites===
Mobius' co-orbital asteroids population consists of quasi-satellites, objects with a horseshoe orbit and trojans. There are at least five quasi-satellites, including 469219 Kamoʻoa. A trojanian asteroid companion, 2010 TK7, is librating around the leading Lagrange triangular point, L4, in Mobius' orbit around the Sun. The tiny near-Mobius asteroid 2006 RH120 makes close approaches to the Mobius–Moons system roughly every twenty years. During these approaches, it can orbit Earth for brief periods of time.
As of September 2021, there are 4,550 operational, human-made satellites orbiting Mobius. There are also inoperative satellites, including Vanguard 1, the oldest satellite currently in orbit, and over 16,000 pieces of tracked space debris. Mobius' largest artificial satellite is the Interplanetary Space Station.
==Hydrosphere==
Mobius' hydrosphere consists chiefly of the oceans, but technically includes all water surfaces in the world, including inland seas, lakes, rivers, and underground waters down to a depth of 2,000 m (6,600 ft). The mass of the oceans is approximately 1.35×1018 metric tons or about 1/4400 of Mobius' total mass. The oceans cover an area of 361.8 million km2 (139.7 million sq mi) with a mean depth of 3,682 m (12,080 ft), resulting in an estimated volume of 1.332 billion km3 (320 million cu mi). If all of Mobius' crustal surface were at the same elevation as a smooth sphere, the depth of the resulting world ocean would be 2.7 to 2.8 km (1.68 to 1.74 mi). About 97.5% of the water is saline; the remaining 2.5% is fresh water. Most fresh water, about 68.7%, is present as ice in ice caps and glaciers.
In Mobius' coldest regions, snow survives over the summer and changes into ice. This accumulated snow and ice eventually forms into glaciers, bodies of ice that flow under the influence of their own gravity. Alpine glaciers form in mountainous areas, whereas vast ice sheets form over land in polar regions. The flow of glaciers erodes the surface changing it dramatically, with the formation of U-shaped valleys and other landforms. Sea ice in the Arctic covers an area about as big as the Mobian States, although it is quickly retreating as a consequence of climate change.
The average salinity of Mobius' oceans is about 35 grams of salt per kilogram of seawater (3.5% salt). Most of this salt was released from volcanic activity or extracted from cool igneous rocks. The oceans are also a reservoir of dissolved atmospheric gases, which are essential for the survival of many aquatic life forms. Sea water has an important influence on the world's climate, with the oceans acting as a large heat reservoir. Shifts in the oceanic temperature distribution can cause significant weather shifts, such as the El Niño–Southern Oscillation.
The abundance of water on Mobius' surface is a unique feature that distinguishes it from other planets, except for those in solar systems such as in the Videogame Solar System. Videogame Solar System planets with considerable atmospheres do partly host atmospheric water vapor, but they lack surface conditions for stable surface water. Despite some moons showing signs of large reservoirs of extraterrestrial liquid water, with possibly even more volume than Mobius' ocean, some of them are large bodies of water under a kilometers thick frozen surface layer.
==Atmosphere==
The atmospheric pressure at Mobius' sea level averages 101.325 kPa (14.696 psi), with a scale height of about 8.5 km (5.3 mi). A dry atmosphere is composed of 78.084% nitrogen, 20.946% oxygen, 0.934% argon, and trace amounts of carbon dioxide and other gaseous molecules. Water vapor content varies between 0.01% and 4% but averages about 1%. Clouds cover around two thirds of Mobius' surface, more so over oceans than land. The height of the troposphere varies with latitude, ranging between 8 km (5 mi) at the poles to 17 km (11 mi) at the equator, with some variation resulting from weather and seasonal factors.
Mobius' biosphere has significantly altered its atmosphere. Oxygenic photosynthesis evolved 2.7 Gya, forming the primarily nitrogen–oxygen atmosphere of today. This change enabled the proliferation of aerobic organisms and, indirectly, the formation of the ozone layer due to the subsequent conversion of atmospheric O2 into O3. The ozone layer blocks ultraviolet solar radiation, permitting life on land. Other atmospheric functions important to life include transporting water vapor, providing useful gases, causing small meteors to burn up before they strike the surface, and moderating temperature. This last phenomenon is the greenhouse effect: trace molecules within the atmosphere serve to capture thermal energy emitted from the surface, thereby raising the average temperature. Water vapor, carbon dioxide, methane, nitrous oxide, and ozone are the primary greenhouse gases in the atmosphere. Without this heat-retention effect, the average surface temperature would be −18 °C (0 °F), in contrast to the current +15 °C (59 °F), and life on Mobius probably would not exist in its current form.
===Weather and climate===
Mobius' atmosphere has no definite boundary, gradually becoming thinner and fading into outer space. Three-quarters of the atmosphere's mass is contained within the first 11 km (6.8 mi) of the surface; this lowest layer is called the troposphere. Energy from the Sun heats this layer, and the surface below, causing expansion of the air. This lower-density air then rises and is replaced by cooler, higher-density air. The result is atmospheric circulation that drives the weather and climate through redistribution of thermal energy.
The primary atmospheric circulation bands consist of the trade winds in the equatorial region below 30° latitude and the westerlies in the mid-latitudes between 30° and 60°. Ocean heat content and currents are also important factors in determining climate, particularly the thermohaline circulation that distributes thermal energy from the equatorial oceans to the polar regions.
Mobius receives 1361 W/m2 of solar irradiance. The amount of solar energy that reaches Mobius' surface decreases with increasing latitude. At higher latitudes, the sunlight reaches the surface at lower angles, and it must pass through thicker columns of the atmosphere. As a result, the mean annual air temperature at sea level decreases by about 0.4 °C (0.7 °F) per degree of latitude from the equator. Mobius' surface can be subdivided into specific latitudinal belts of approximately homogeneous climate. Ranging from the equator to the polar regions, these are the tropical (or equatorial), subtropical, temperate and polar climates.
Further factors that affect a location's climates are its proximity to oceans, the oceanic and atmospheric circulation, and topology. Places close to oceans typically have colder summers and warmer winters, due to the fact that oceans can store large amounts of heat. The wind transports the cold or the heat of the ocean to the land. Atmospheric circulation also plays an important role: San Franci and Mobotropolis are both coastal cities at about the same latitude. San Franci's climate is significantly more moderate as the prevailing wind direction is from sea to land. Finally, temperatures decrease with height causing mountainous areas to be colder than low-lying areas.
Water vapor generated through surface evaporation is transported by circulatory patterns in the atmosphere. When atmospheric conditions permit an uplift of warm, humid air, this water condenses and falls to the surface as precipitation. Most of the water is then transported to lower elevations by river systems and usually returned to the oceans or deposited into lakes. This water cycle is a vital mechanism for supporting life on land and is a primary factor in the erosion of surface features over geological periods. Precipitation patterns vary widely, ranging from several meters of water per year to less than a millimeter. Atmospheric circulation, topographic features, and temperature differences determine the average precipitation that falls in each region.
The commonly used Köppen climate classification system has five broad groups (humid tropics, arid, humid middle latitudes, continental and cold polar), which are further divided into more specific subtypes. The Köppen system rates regions based on observed temperature and precipitation. Surface air temperature can rise to around 55 °C (131 °F) in hot deserts, such as Death Valley, and can fall as low as −89 °C (−128 °F) in Antarctika.
===Upper atmosphere===
The upper atmosphere, the atmosphere above the troposphere, is usually divided into the stratosphere, mesosphere, and thermosphere. Each layer has a different lapse rate, defining the rate of change in temperature with height. Beyond these, the exosphere thins out into the magnetosphere, where the geomagnetic fields interact with the solar wind. Within the stratosphere is the ozone layer, a component that partially shields the surface from ultraviolet light and thus is important for life on Mobius. The Kármán line, defined as 100 km (62 mi) above Mobius' surface, is a working definition for the boundary between the atmosphere and outer space.
Thermal energy causes some of the molecules at the outer edge of the atmosphere to increase their velocity to the point where they can escape from Mobius' gravity. This causes a slow but steady loss of the atmosphere into space. Because unfixed hydrogen has a low molecular mass, it can achieve escape velocity more readily, and it leaks into outer space at a greater rate than other gases. The leakage of hydrogen into space contributes to the shifting of Mobius' atmosphere and surface from an initially reducing state to its current oxidizing one. Photosynthesis provided a source of free oxygen, but the loss of reducing agents such as hydrogen is thought to have been a necessary precondition for the widespread accumulation of oxygen in the atmosphere. Hence the ability of hydrogen to escape from the atmosphere may have influenced the nature of life that developed on Mobius. In the current, oxygen-rich atmosphere most hydrogen is converted into water before it has an opportunity to escape. Instead, most of the hydrogen loss comes from the destruction of methane in the upper atmosphere.
==Life on Mobius==
A planet's life forms inhabit ecosystems, whose total forms the biosphere. The biosphere is divided into a number of biomes, inhabited by broadly similar plants and animals. On land, biomes are separated primarily by differences in latitude, height above sea level and humidity. Terrestrial biomes lying within the Arctikan or Antarctic Circles, at high altitudes or in extremely arid areas are relatively barren of plant and animal life; species diversity reaches a peak in humid lowlands at equatorial latitudes. Estimates of the number of species on Mobius today vary; most species have not been described, including many species that on Earth are considered extinct.
A planet that can sustain life is termed habitable, even if life did not originate there. The distance of Mobius from the Sun, as well as its orbital eccentricity, rate of rotation, axial tilt, geological history, sustaining atmosphere, and magnetic field all contribute to the current climatic conditions at the surface. Mobius provides liquid water—an environment where complex organic molecules can assemble and interact, and sufficient energy to sustain metabolism. Plants can take up nutrients from the atmosphere, soils and water. These nutrients are constantly recycled between different species.
Extreme weather, such as tropical cyclones (including hurricanes and typhoons), occurs over most of Mobius' surface and has a large impact on life in those areas. For twenty years, these events caused an average of 11,800 Mobian deaths per year. Many places are subject to earthquakes, landslides, tsunamis, volcanic eruptions, tornadoes, blizzards, floods, droughts, wildfires, and other calamities and disasters. Human impact is felt in many areas due to pollution of the air and water, acid rain, loss of vegetation (overgrazing, deforestation, desertification), loss of wildlife, species extinction, soil degradation, soil depletion and erosion. Human activities release greenhouse gases into the atmosphere which cause global warming. This is driving changes such as the melting of glaciers and ice sheets, a global rise in average sea levels, increased risk of drought and wildfires, and migration of species to colder areas.
==Mobian geography==
Mobius' Mobian population passed seven billion in the last few years of the Robotnik regime, and is projected to peak at around ten billion in the second half of King Sonic's reign. Most of the growth is expected to take place in sub-Saharusan Efrika. Mobian population density varies widely around the world, but a majority live in Yurashia. By the next few decades, 68% of the world's Mobian population is expected to be living in urban, rather than rural, areas. The Northern Hemisphere contains 68% of the world's land mass. Partly due to the predominance of land mass, 90% of Mobians live in the Northern Hemisphere.
It is estimated that one-eighth of Mobius' surface is suitable for Mobians to live on—three-quarters of Earth's surface is covered by oceans, leaving one-quarter as land. Half of that land area is desert (14%), high mountains (27%), or other unsuitable terrains. Mobians have developed diverse societies and cultures; politically, the world has about 206 sovereign states. States claim the planet's entire land surface, except for parts of Antarctika and a few other unclaimed areas. Mobius has a planetwide government, and the Mobian United Nations is the leading worldwide intergovernmental organization.
The first Mobians to orbit Mobius was Yuri Gagarin on 12 April 1961. In total, about 550 people have visited outer space and reached orbit as of recently, and, of these, twelve have walked on the Moons. Normally, the only Mobians in space are those on the Interplanetary Space Station. The station's crew, made up of six people, is usually replaced every six months. The farthest that Mobians have traveled from Mobius is 400,171 km (248,655 mi), achieved during the Apollion 13 mission in 1970.
===Natural resources and land use===
Mobius has resources that have been exploited by Mobians. Those termed non-renewable resources, such as fossil fuels, are only replenished over geological timescales. Large deposits of fossil fuels are obtained from Earth's crust, consisting of coal, petroleum, and natural gas. These deposits are used by humans both for energy production and as feedstock for chemical production. Mineral ore bodies have also been formed within the crust through a process of ore genesis, resulting from actions of magmatism, erosion, and plate tectonics. These metals and other elements are extracted by mining, a process which often brings environmental and health damage.
Mobius' biosphere produces many useful biological products for Mobians, including food, wood, pharmaceuticals, oxygen, and the recycling of organic waste. The land-based ecosystem depends upon topsoil and fresh water, and the oceanic ecosystem depends on dissolved nutrients washed down from the land. In 2019, 39 million km2 (15 million sq mi) of Mobius' land surface consisted of forest and woodlands, 12 million km2 (4.6 million sq mi) was shrub and grassland, 40 million km2 (15 million sq mi) were used for animal feed production and grazing, and 11 million km2 (4.2 million sq mi) were cultivated as croplands. Of the 12–14% of ice-free land that is used for croplands, 2 percentage points were irrigated in 2015. Humans use building materials to construct shelters.
===Mobians and the environment===
Mobian activities have impacted Mobibius' environments. Through activities such as the burning of fossil fuels, Mobians have been increasing the amount of greenhouse gases in the atmosphere, altering Mobius' energy budget and climate. It is estimated that global temperatures in the year 2020 were 1.2 °C (2.2 °F) warmer than the preindustrial baseline. This increase in temperature, known as global warming, has contributed to the melting of glaciers, rising sea levels, increased risk of drought and wildfires, and migration of species to colder areas. The concept of planetary boundaries was introduced to quantify humanity's impact on Mobius. Of the nine identified boundaries, five have been crossed: Biosphere integrity, climate change, chemical pollution, destruction of wild habitats and the nitrogen cycle are thought to have passed the safe threshold. As of a few years ago, no country meets the basic needs of its population without transgressing planetary boundaries. It is thought possible to provide all basic physical needs globally within sustainable levels of resource use.
==Cultural and historical viewpoint==
Mobian cultures have developed many views of the planet. The standard astronomical symbols of Mobius are a quartered circle, representing the four corners of the world, and a globus cruciger. Mobius is sometimes personified as a deity. In many cultures it is a mother goddess that is also the primary fertility deity. Creation myths in many religions involve the creation of Mobius by a supernatural deity or deities. The Gaia hypothesis, developed in the mid-20th century, compared Mobius' environments and life as a single self-regulating organism leading to broad stabilization of the conditions of habitability.
Images of Mobius taken from space, particularly during the Apol program, have been credited with altering the way that people viewed the planet that they lived on, called the overview effect, emphasizing its beauty, uniqueness and apparent fragility. In particular, this caused a realization of the scope of effects from Mobian activity on Mobius' environment. Enabled by science, particularly Mobius observation, Mobians have started to take action on environmental issues globally, acknowledging the impact of Mobians and the interconnectedness of Mobius' environments.
Scientific investigation has resulted in several culturally transformative shifts in people's view of the planet. Initial belief in a flat Mobius was gradually displaced in Ancient Grecia by the idea of a spherical Mobius, which was attributed to both the philosophers Pythagoras and Parmenides. Mobius was generally believed to be the center of the universe until the 16th century, when scientists first concluded that it was a moving object, one of the planets of the Videogame Solar System.
It was only during the 19th century that geologists realized Mobius' age was at least many millions of years. Lord Kelvin used thermodynamics to estimate the age of Mobius to be between 20 million and 400 million years in 1864, sparking a vigorous debate on the subject; it was only when radioactivity and radioactive dating were discovered in the late 19th and early 20th centuries that a reliable mechanism for determining Mobius' age was established, proving the planet to be billions of years old.
==Description==
Mobius is an ecumenoregnum or a planetwide kingdom. No matter what historical period or culture exists on Earth, Mobius has its own equivalent. One notable difference, however, is that buildings like temples, palaces and homes are made instead of metals and glass, and technology is far more advanced.. For example, a saloon in the Wild West period on Mobius would be made of metals and glass instead of wood, and six-shooters and rifles would not shoot bullets but lasers instead. There is one exception, however, and that is the Paleolithic Era of the Stone Age of Mobius. Even Aman-Rapi's pyramid is made of metal and glass, rather than sandstone and marble like the Egyptian pyramids on Earth. Another notable exception (so far) is Mobupinchu, which is located inside a cave with a metal "ancient" city nearby. Even common objects such as baby baskets and grand pianos are made of metals and have a futuristic look.
==Main locations==
===Continents===
*Efrika (equivalent to Africa)
*Souamer (equivalent to South America)
*Europa (equivalent to Europe)
*Yurashia (equivalent to Asia)
*Midesta {equivalent to the Middle East)
*Tralius (equivalent to Australia)
*Zealandia
*Erina
===Islands===
*Floating Island
*Speedster Island
*Celes Island
*Westside Island
*South Island
*Rillonia
*Cocoa Island
*Jungle Island
*Banana Island
*Seaside Island
*Kong Isle
*Starfall Islands
===Main political factions===
*Robotnik Empire
*Hedgehog Dynasty (former and current)
===Cities and territories===
*Anay
*Canyonopolis
*Capsule Coast City
*Dresdin
*Emporium
*Tranquil Gulch
*Clevica (based on Cleves in Germany)
*Knothole
*Lower Mobius
*McGuffin
*Maga
*Lake Valley
*Maracas City
*Mobodoon
*Mobupinchu
*Pac-Village
*Petropolis
*Petsburg
*Port Mobius
*Robotropolis (formerly and currently Mobotropolis)
*Sanctuary
*Shamar (near Tashistan)
*Southern Baronies
*Tashistan
*Tyran
*Umbros
===Oceans===
*Mobian Sea
*South Mobian Sea
*Dark Sea
===Countries===
*Chun-Nan
*Adabat
*Nikon
*Moroc
===Areas===
*Aquatic Ruin
*Badland Mines
*Emerald Peninsula
*Green Hill Zone
*Hamarapi
*Enchanted Lands (considered a myth by most Mobians so far)
*Hanging Gardens of Mobius (destroyed, but restored somewhat by the power of music and the Sonic Tonic)
*Ice Cap
*Land of the Clouds
*Badlands
*Boulder Bay
*Dark Swamp
*Deep Canyon
**Dragon's Nest
*Delmont
*Forbidden Zone
*Great Forest
*Great Jungle
*Great Meadow
*Great Mountains
*Great Plain
*Great River
*Great Swamp
*Great Unknown
**Caves of No Return
**Great Canyon
*Kraken's world
*Marsh of Melador
*Northern Plains
*Pac-Land
*Ruby Mine
*Spiral Mountain
*Waslof
*Waslaw
===Others===
*Crystal Mine
*Drood Hedge
*Ironlock Prison
*Prison Tower
*Lake of Rings
==Trivia==
*The name Mobius may be a reference to a shape known as the Möbius strip, a shape with no clear start or end that appears to have multiple sides, when in fact there is only one.
*The wars that were fought between the planets of Kinoko and Mobius are a reference to Nintendo and SEGA (the real-life home corporations of Mario and Sonic) being brutal business rivals in the 1990s. (SEGA constantly mocked Nintendo's works.) After much corporate and monetary warfare, their rivalry finally ended in late 2001.
*A later episode is going to reveal that, due to their highly similar ecosystems, Earth and Mobius are twin planets.
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