Halawana

== Planet Information ==
Halawana is the sixth planet from its star and the only astronomical body in its system known to harbor life. This is enabled by Halawana being a water world, one of two planets in its system where liquid water is present on the surface. Almost all of Halawana's water is contained in its global ocean, covering 92.3% of Halawana's crust. The remaining 7.7% of Halawana's crust is land, most of which is present as small islands or medium sized landmasses within Halawana's land hemisphere. All of Halawana's land is somewhat humid and covered by vegetation, while seasonal icebergs and small sheets of ice form at the poles, containing some of Halawana's groundwater, however most of it is present within the lakes, rivers, and atmosphere. Halawana's crust consists of slowly moving tectonic plates, which interact to form volcanoes, mountain ranges, islands, and quakes (Earthquakes). Halawana has a liquid outer core which produces a powerful magnetosphere capable of protecting the planet from most of the solar wind and cosmic radiation.
Halawana has a dynamic atmosphere, which sustains the surface conditions and protects it from most meteoroids and UV-light at entry. It has a composition of primarily nitrogen and oxygen. Water vapor is widely present in the atmosphere, forming clouds that cover most of the planet. The water vapor acts as a greenhouse gas and, together with other greenhouse gasses in the atmosphere, particularly carbon dioxide, creates conditions for both liquid surface water and water vapor to exist via the capturing of energy from its stars light. This maintains the average temperature of Halawana's surface at 11.18 °C (52.124 °F), at which water is liquid under its atmospheric pressure. Differences in the amount of energy captured between geographical regions (the equator receives more sunlight than polar regions) drives atmospheric and ocean currents, producing a global climate system with different climate regions and various types of weather and precipitation to occur which allows for components such as nitrogen to cycle.
Halawana is rounded into an ellipsoid with a circumference of about 49,000 km. It is the densest planet in its system. Of the eight rocky planets, it is the largest and most massive. Halawana is about 9 light minutes away from its star, taking 1.2 years (444.205 days) to complete an orbit. Halawana rotates around its own axis in slightly less than 13 hours (in about 12 hours 40 minutes and 0.62 seconds). Halawana's axis of rotation is tilted on its orbital plane relative to its star, which causes seasons. Halawana is orbited by 9 natural satellites, 3 of which are spherical, the closest of which orbits at 46,200 km, the other at 63,000 km, and the farthest at 86,000 km, while the other 6 are irregularly shaped dwarf moons. Of the 3 large moons, the farthest is the largest moon, having the most gravitational influence over Halawana's tides. These moons help stabilize Halawana's axis, cause tides, and slow the rotation of Halawana. Tidal locking has caused every moon of Halawana to always face the planet the same side.
Halawana, like most other celestial bodies in its star system, formed 6.3 billion years ago from the gas and material in its stars accretion disk. During the first 1.5 billion years of Halawana's history, the oceans formed and then life within it. Life spread globally and has been altering the surface and atmosphere of Halawana, which caused an oxidation event about 4 billion years ago. Intelligent life emerged around 250,000 years ago on the larger landmasses and has been spreading throughout the various islands and small land masses ever since. Today, intelligent life poses no damage to Halawana's ecosystem, as they are not in an advanced stage of technological advancements, only being as far as using small water vessels and navigating the planet using the stars and ocean currents, along with having very friendly and a laid-back nature.
== Natural History ==
=== Formation ===
The oldest natural rock formations found on Halawana date back to 6.3 billion years ago, and by that time Halawana had just formed from material such as gas, rock, and asteroids in its star's accretion disk. Along with the other bodies in the system, Halawana formed and evolved with its star. It's likely that Halawana took only a couple hundred million years to fully form after the birth of its star. 
Halawana's natural satellites are theorized to have formed when a planet around 75% the size of Halawana collided with the planet a short time after formation, as this seems to be the case for Halawana's largest moon, Tup. However, Halawana's other two moons, Reda and Mave are thought to be minor planets which were captured by Halawana sometime in the early days of its system. Evidence supporting this reveals that the mineral composition within the rocks of Tup and Halawana are extremely similar, suggesting that Tup formed alongside Halawana. Asteroid impacts during bombardments in the early system changed the surface of the 3 moons as well as Halawana, some of which were captured into permanent orbits around Halawana. 
=== After formation ===
Halawana's atmosphere and oceans were formed shortly after the planet cooled, after 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 Halawana since it formed, with atmospheric greenhouse gasses keeping the oceans from freezing when the newly forming star had 75% of its current luminosity. By 5.6 billion years ago, Halawana's magnetic field was established, which helped prevent the atmosphere from being stripped away by the solar wind. 
As the molten outer layer of Halawana 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. Research suggests that at least some felsic crust existed as early as 6.1 billion years ago, only 200 million years after Halawana's formation. Halawana has always had a very small land area, due to the amount of water covering the continental crust, existing high above altitudes where most average land masses form. It could be said that all of Halawana's land are the peaks of mountain ranges and volcanoes, although these plates do shift around and have come together a couple times over the course of Halawana's history.
New continental crust forms as a result of plate tectonics, a process ultimately driven by the continuous loss of heat from Halawana's interior. Over the period of hundreds of millions of years, tectonic forces have caused areas of continental crust to group together to form larger landmasses that have subsequently broken apart. The earliest known landmass to form out of all the islands is named Keypuyar, which began to break apart almost 1.5 billion years ago. Subsequent landmasses have come together and broken up in this same cycle, with their being at least 5 known large landmasses.
=== Rings ===
One of Halawana's most incredible spectacles is the presence of its large ring system, which has been a part of Halawana's history for several million years. The rings were formed when an asteroid about half the size of Reda approached within the Roche limit of Halawana, being subsequently torn apart by the planet's strong gravity into a magnificent ring system composed of mainly dust, small rocks and fine grains of minerals. Observers on the ground have concluded that the formation of the rings may have caused a mass extinction event, when too much ring material falling into Halawana had temporarily heated up the atmosphere increasing the average surface temperature of the planet for centuries until the amount of material falling in had ceased and the rings became stable. 
The hundreds of small gaps in the rings are the results of material clumping up with gravity, ranging from a few kilometers to a couple hundred in diameter. These gaps have small objects of ring material lying within them as they slowly accumulate more material over millions of years, which will result in new moon formation. 
=== Origin of life and evolution ===
Chemical reactions led to the first self-replicating molecules about 4.8 billion years ago. A half billion years later, the last common ancestor of all current life on Halawana arose. The evolution of photosynthesis allowed its stars energy to be harvested directly by life forms. The resultant molecular oxygen accumulated in the atmosphere and due to interaction with ultraviolet solar radiation, formed a protective ozone layer in the upper atmosphere. The incorporation of smaller cells within larger ones resulted in the development of complex cells. 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 Halawana's surface, and over billions of years life shaped and molded the planet into what it is today, described by many as a tropical paradise planet, with some of the most complex and diverse lifeforms (especially plant life).
It is theorized that in the distant past, Halawana had much cooler average surface temperatures which combined with its 38-degree axial tilt allowed for large ice caps where life would flourish beneath those sheets protected from ultraviolet radiation and other harmful particles, getting its nutrients from hydrothermal vents. The ice sheets melted as the planet became more tropical, allowing for these organisms to spread out in Halawana's vast oceans and begin photosynthesizing. This led them to eventually inhabit small islands and then the large landmasses which then became their own large and self-sustaining ecosystems. Today, Halawana is teeming with life wherever you may go.
== Physical Characteristics ==
=== Size and shape ===
Halawana has a rounded shape, with an average diameter of 15,722 kilometers (9,769 miles), making it the second largest planetary sized and second largest terrestrial object of its star system. 
Due to Halawana's rotation it has the shape of an ellipsoid, bulging it its equator; its diameter is 157 kilometers (97 miles) longer at its equator than at its poles. Halawana's shape has topographic variations, going as deep as the deepest parts of the ocean, all the way to the tallest mountains on the planet, and although these variations have a minimal effect of the diameter of Halawana, they still do cause somewhat of an effect upon the surface of the world.
=== Surface ===
Halawana's surface is the boundary between the atmosphere, and the solid ground and oceans. Halawana has a surface area of 776 million square kilometers (299 million square miles). Halawana has 2 hemispheres, the north and south hemispheres, similarly to Earth. The planet can also be split into the eastern and western hemispheres.
Most of Halawana's surface is covered by water: 92.3% or 700 million square kilometers (435 million square miles) of Halawana's surface. This vast pool of salty water is often called "The sea of Blue" (Mam'yaka in Lithu) and makes Halawana with its dynamic hydrosphere a water world or ocean world. Indeed, in Halawana's early history the ocean may have covered Halawana completely. The world ocean is commonly divided into the Infinite Ocean, (Yekmatan cicea) and the Tropical Ocean (Uem'itat cicea). The ocean covers Halawana's oceanic crust, with the shelf seas covering the shelves of the continental crust to a lesser extent. The oceanic crust forms large oceanic basins with features like abyssal planes, seamounts, submarine volcanoes, oceanic trenches, submarine canyons, oceanic plateaus, and a globe-spanning mid-ocean ridge system.
Halawana's land covers 8.7% of its surface area, of around 67 million square kilometers (41 million square miles) of the surface. The land surface includes many islands around the globe, but most of the land is taken by the 3 main continental landmasses, Yektan, Ilma, and Kakahia (from largest to smallest). These landmasses are further broken down and grouped into the continents. The terrain of the land surface varies greatly and consists of mountains, deserts, plains, plateaus, and other landforms. The altitudes in which landmasses range from is very great, ranging from nearly 10 kilometers above sea level to -5 kilometers below sea level.
Land can be covered by surface water, snow, ice, artificial structures or vegetation. Most of Halawana's land hosts vegetation, but ice sheets (3%, not including the equally large land under permafrost) or cold as well as hot deserts (24%) occupy also considerable amounts of it.
The land surface and the ocean floor form the top of Halawana's crust, which together with parts of the upper mantle form Halawana's lithosphere. Halawana's crust may be divided into oceanic and continental crust. Beneath the ocean-floor sediments, the oceanic crust is predominantly basaltic, while the continental crust may include lower density materials such as granite, sediments and metamorphic rocks. Nearly 67% of the continental surfaces are covered by sedimentary rocks, although they form about 7% of the mass of the crust.
=== Gravitational field ===
The gravity of Halawana is the acceleration that is imparted to objects due to the distribution of mass within Halawana. Near Halawana's surface, gravitational acceleration is approximately 14.54 m/s2 (47.7 ft/s2). Local differences in topography, geology, and deeper tectonic structure cause local and broad regional differences in Halawana's gravitational field, known as gravity anomalies.
=== Magnetic field ===
The main part of Halawana's 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 Halawana's surface, where it is, approximately, a dipole. The poles of the dipole are located close to Halawana's geographic poles. 
== Images ==
File:Halawana Surface.jpg|Halawana's Suface
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