Algo System

## Habitability

### Habitable Planets and Moons

4 (7 at birth) planets, 0 (0 at birth) moons* Aphreen (runaway greenhouse effect)
* Dessitel
* Algodoo
* Phun
* Tundrayaal
* Rojares (water lost and frozen)
* Phaed (frozen)

### Native Intelligent Species

* Dessiteans
* Elementals
* Stick figures
* Phunites
* Tundrayans

The Algo System is a system of planets, dwarf planets, minor planets, moons, and all objects that orbit Algo.

## Stars

#### Algo

Pronunciation: /ˈæɫ.gəʊ/ *AL-goh*

Algo is a lone yellow dwarf star of spectral type G3V. Eighteen planets orbit this star, the most out of any star system found. It is also the star with the most info about it due to its large planetary system, including four habitable planets, two of which are co-orbital. The system's outer planets are also in a Laplace resonance chain of 5:2, 4:3, 3:2, 5:3, 6:5 and 2:1. Host star of the Dessiteans, Algodians, Phunites and Tundrayans. Algo is 5.0 billion years old, making it about half-way through its 11 billion-year lifespan. Known Algolar siblings include Phoenix (β Pyravii) and Anzû (φ Pyravii).

## Inner Algo System

#### Hufistos (Algo I)

Pronunciation: /hᵿ.ˈfɪs.ˌtɒs/ *huuh-FIHS-tos*

A small rocky planet. Rocks on its surface has the consistency of taffy due to high temperatures on its surface. It is also tidally locked to Algo, so one face perpetually faces the star. Temperatures on the day side can reach over 900°C while its night side can drop below -150°C. It is moonless due to its proximity to Algo.

#### Glaucerm (Algo II)

Pronunciation: /ˈglaʊ.kɜːm/ *GLOU-kurm*

A small rocky planet with a very tenuous, almost non-existent atmosphere and a heavily cratered surface. It is locked in a 3:2 spin-orbit resonance, meaning it spins thrice for every twice it orbits. Due to this and its tenuous atmosphere, its day side is at 430°C but its night side is at -180°C. It is moonless due to its proximity to its host star.

#### Fiera (Algo III)

Pronunciation: /fi.ˈɛ.ɹə/ *fee-EH-rə*

A small rocky planet with a very corrosive and thick carbon dioxide-rich atmosphere with some nitrogen dioxide, making it look a deep orange-red from space. It has many volcanoes and lava lakes all across its surface underneath the clouds of nitric acid. Due to its greenhouse effect, it is over 650°C all over the planet, even at the poles and at night. It has one asteroid-sized moon, Ignis, orbiting in a highly inclined and elliptical orbit. Fiera itself has a retrograde rotation, rotating once every 7.39 days.

#### Aphreen (Algo IV)

Pronunciation: /ˈæ.fɹiːn/ (*A-freen, rhymes with "sixt**een**")*

An medium-sized rocky planet with a corrosive, carbon dioxide-rich atmosphere with sulfur dioxide and sulfuric acid clouds. Its surface is mostly volcanic, with many volcanoes dotting the landscape. Due to its greenhouse effect, it is over 460°C all over the planet, even at the poles and at night. It has the slowest rotation of all the planets in the Algo system, rotating once every 197 days. It is moonless due to its slow retrograde rotation.

#### Dessitel (Algo V)

Pronunciation: /ˌdɛ.zᵻ.ˈtɛɫ/ *deh-zih-TEHL*

A habitable super-Algodoo rocky planet with tropical environments all over, including its poles. It has one large supercontinent with four large deserts, Kaqho, Yaritl, Oħatl and Qufa, on its surface. Due to this, it is susceptible to planet-wide dust storms. and a large moon, Aridus. Home to the Dessiteans.

#### Algodoo (Algo VI)

Pronunciation: /ˈæɫ.gə.ˌdʊ/ *AL-gə-doo*

A habitable medium-sized rocky planet with habitable conditions and several continents across its surface. Is co-orbital with Phun and has two moons of its own, named Algoroid and Algluna. Home to the stick figures and elementals, collectively known as the Algodians.

#### Phun (Algo VII)

Pronunciation: /ˈfʌn/ *(FUHN, exactly like the word "fun")*

A habitable earth-sized rocky planet with habitable conditions and several continents across its surface. Is co-orbital with Algodoo and has two moons of its own, Phunroid and Phuna. Home to the Phunites.

#### Tundrayaal (Algo VIII)

Pronunciation: /tʊn.ˈdɹeɪ.əɫ/ (*tuun-DRAY-əl*, *rhymes with "betr**ayal**")*

A habitable medium-sized rocky planet with polar and temperate conditions and about a dozen small continents across its surface. The average temperature is 5°C, so its polar ice caps cover roughly half of the planet. It has three moons of its own, Kyanos, Albrac and Azurus, and four discrete, rocky rings. Home to the four-eyed, avian Tundrayans.

#### Rojares (Algo IX)

Pronunciation: /ˌɹəʊ.ˈʒɑː.ɹᵻz/ *roh-ZHAH-rihz*

A small rocky planet covered by a cold rusty desert that spans the whole planet. Due to this, it has been labelled as "Dessitel Jr.". However, its atmosphere is extremely thin, 120 times less pressure as on the Algodian surface, which makes it notoriously difficult to land on. It has two captured asteroids, Hemos and Necros, as moons.

#### Phaed (Algo X)

Pronunciation: /ˈfɑː.ɪd/ *FAH-ihd*

A small rocky planet covered with ice and snow. A cold, foggy atmosphere surrounds the planet, making it look almost white from space. Despite its drawbacks, Phaed is considered a prime location for terraformation due to it resembling a deep-frozen version of an Earthlike planet. Phaed hosts 4 moons, Icarus, Cycnos, Lucifer, and Daedalus, along with a thin ring.

## Asteroid Belt

#### 1 Demet

Pronunciation: /dᵻ.ˈmɛt/ *dih-MEHT*

A rocky dwarf planet in the Algo system's asteroid belt, containing about a quarter of the mass of the whole asteroid belt. However, it seems to have differentiated, a feat only achieved by the two largest asteroids in the asteroid belt. The other two are the dwarf planet candidates 4 Hesva and 2 Athepa. It may contain water ice under its crust. It is moonless due to its tiny size.

## Outer Algo System

#### Juvin (Algo XI)

Pronunciation: /ˈd͡ʒuː.vɪn/ *JOO-vihn*

A large gas giant, the largest planet in the Algo system. Winds of up to 900 km/h have been measured around the planet, its cloud bands are distinct brown and white stripes. It has a large red storm that has been raging for at least 400 years and shows no signs of stopping anytime soon. Wind speeds of more than 1200 km/h were measured in the storm. It has 100 moons, with 5 large enough to be ellipsoidal. Each of the 5 rounded moons could be a planet in its own right, were they not orbiting Juvin. Kelile is a volcanic moon erupting plumes of sulfur into space. Azlar is an icy moon with an underground ocean. Khagan is the largest moon in the Algo system with an underground ocean, along with geologically active Gravemaker and the cold dead Marjana. The other moons are little more than small captured asteroids or shepherd moons. It also has 7 dusty, nearly invisible rings, visible only to the largest telescopes from Algodoo.

#### Chronox (Algo XII)

Pronunciation: /ˈxɹɒ.nɒks/ *KHRO-noks*

A large gas giant. Winds of up to 1600 km/h have been measured around the planet, its cloud bands are more subtle than Juvin's. Every 15 years, large white storms, called the White Spots, appear in the temperate regions of the planet. It has 92 moons and innumerable moonlets, with 7 large enough to be ellipsoidal. The most interesting rounded moons are Joon, the only moon in the Algo system with a substantial atmosphere and hydrocarbon lakes, seas and rivers. Gardowl also has a bright white surface covered with ice. Cryovolcanic activity has coated the moon with snow, which is why it is a bright white. Interestingly, its surface suggests that the moons Chronox-ward of Vivica are only 100 million years old. Vivica itself is the only moon with a ring system. Besides Bane, Zekena, and Atomos, the other moons are little more than small captured asteroids or shepherd moons. It also has a large, complex and expansive ring system mostly made of ice and rock from a destroyed moon. Thousands of ringlets have been documented, actual number unknown.

#### Vitri (Algo XIII)

Pronunciation: /ˈvɪ.tɹi/ *VIH-tree*

A small ice giant. It has a substantial amount of chlorine in its atmosphere, making it green and its atmosphere is highly corrosive due to the hydrogen chloride in its atmosphere. Winds of up to 400 km/h have been measured around the planet, its cloud bands are almost impossible to notice. Has 8 moons and a lone ellipsoidal moon, Melendor, is situated between the outer swarm of small captured asteroids and inner shepherd moons. Melendor itself is little more than a heavily cratered, dark, icy moon. The other moons are little more than small captured asteroids or shepherd moons. 3 thin, nearly invisible, dusty rings surround the planet.

#### Urus (Algo XIV)

Pronunciation: /ˈʊ.ɹᵿs/ *UU-ruuhs*

A small ice giant. It has a substantial amount of methane in its atmosphere, making it cyan or turquoise. Winds of up to 1000 km/h have been measured around the planet, its cloud bands are almost impossible to notice. Has 30 moons, with 6 large enough to be ellipsoidal. All 6 are smaller than Hadion but Isarnia and Maslepus are remarkably active, boasting canyons and even underground oceans. The other moons are little more than small captured asteroids or shepherd moons. About 20 thin, inconspicuous, icy-rocky rings surround the planet.

#### Norex (Algo XV)

Pronunciation: /nɒ.ˈɹɛks/ *no-REHKS*

A small ice giant. It has a substantial amount of methane in its atmosphere, making it blue. Winds of up to 2200 km/h have been measured around the planet making it the windiest planet in the Algo system, its cloud bands are almost impossible to notice. Has 15 moons, with 2 large enough to be ellipsoidal. Quintus and Obakan are unusual in their orbits. Quintus is misaligned with Norex's equator, with an orbital inclination of 51°. Obakan is even stranger as it orbits in retrograde, against the direction of Norex's spin. However, while Quintus is an active world of nitrogen geysers and even a thin atmosphere, Obakan is practically dead and heavily cratered. The other moons are little more than small captured asteroids or shepherd moons. 6 thin, nearly invisible, dusty rings surround the planet.

## Trans-Norexian Region

#### Xynoph (Algo XVI)

Pronunciation: /ˈzaɪ.nəʊf/ *ZYE-nohf*

A small rocky planet covered with ice and snow. A thick, lavender haze of frozen argon and nitrogen in its thick, stuffy atmosphere obscures the surface, which is covered with snow and ice due to the sheer distance from its host star. A subsurface ocean exists below the thick icy crust. Ejected from the inner Algo system, it holds on to 4 moons, Qheva, Zefiri, Jokham, and Ximaf.

#### 134340 Hadion

Pronunciation: /ˈhæ.dᵻ.ˌɒn/ *HA-dih-on*

An icy dwarf planet. Its surface is stained shades of brown and tan due to tholins. A large, heart-shaped glacier on its surface is its most interesting feature, alongside the fact that it, like many other icy bodies, has subsurface oceans. It is in a 3:2 resonance with Norex. It has 5 moons, Phoenix, Telephassa, Cilix, Agenor and Cadmus. The largest and closest moon, Phoenix, is tidally locked and Hadion is tidally locked to Phoenix. In fact, they are considered a binary dwarf planet system as the two orbit a point above Hadion's surface.

#### 136108 Teraauna

Pronunciation: /ˌtɛ.ɹə.ˈʔaʊ.nə/ *teh-rə-'OW-nə*

An icy dwarf planet. A patch of its surface is stained red due to tholins. It rotates so fast, once every 3.9 hours, that it has distorted itself into an ellipsoid, looking more like an old rugby ball than a planet. It is in a 12:7 resonance with Norex. It has 2 moons, Eos and Astraeus, and a ring.

#### 136472 Maxenexa

Pronunciation: /ˌmɑk.sə.ˈnɛk.sə/ *mahk-sə-NEHK-sə*

An icy dwarf planet. Its surface is stained red due to tholins. It is very reflective, reflecting 81% of light that hits it. The dwarf planet is uniquely in a 13:7 resonance with Norex, unlike any other object in the Virrzki Belt. It has 1 unnamed moon, sometimes known as MX2.

#### 119979 Fenkoa

Pronunciation: /ˌfɛŋ.ˈkəʊ.ə/ *fehng-KOH-ə*

An icy dwarf planet. Its surface is stained yellow-brown due to tholins. It is very reflective, reflecting 92% of light that hits it. It is in a 2:1 resonance with Norex. It, like many other icy bodies, has subsurface oceans. It also has a thin atmosphere similar to Quintus's. It has 4 moons, Zephyrus, Boreas, Eurus and Notus. Zephyrus is the largest and is large enough to slow down Fenkoa's rotation to around 24 hours. It also has 2 rings.

#### Krios (Algo XVII)

Pronunciation: /ˈkɹɪəs/ *KRIH-əs*

A small rocky planet covered with ice and snow. A thick, pale blue haze of frozen oxygen and nitrogen in its thick, stuffy atmosphere obscures the surface, which is covered with snow and ice due to the sheer distance from its host star. A subsurface ocean exists below the thick icy crust. Ejected from the inner Algo system, it holds on to 5 captured asteroids, Jzi, Qiz, Kinz, Xiz, and Viqz, as moons.

#### 136199 Ersim

Pronunciation: /ˈɜː.sᵻm/ *UR-sihm*

An icy dwarf planet. Its surface is covered with ice but, unusually, is not substantially stained by tholins, unlike its inner neighbours, making it pale grey in colour. It is the second most reflective object in the Algo system after Chronox's moon Gardowl, reflecting 97% of light that hits it. It is the only confirmed dwarf planet in the Xakijj Disk. It has 3 moons, Nuxa, Dysna and Lira. Dysna is the largest and is large enough to slow down Ersim's rotation to around 14.56 days.

#### Etida (Algo XVIII)

Pronunciation: /ˈɛ.tᵻ.də/ *EH-tih-duh*

A large rock-ice planet with a thick, light blue-purple haze made of hydrogen in its thick, stuffy atmosphere. Its orbit in the inner Izijj Cloud peturbs the orbits of the Arnaaoids. 7 moons, Vna, Zuxl, Xrn, Ilu, Kuxi, Juq and Quzi and 5 rings orbit this desolate wasteland of a planet.

## Trivia

* The Algo System is the Algoverse equivalent to the Solar System. The list of equivalent planets are:
	+ Hufistos = Vulcan
	+ Glaucerm = Mercury
	+ Aphreen = Venus
	+ Algodoo = Earth
	+ Rojares = Mars
	+ Phaed = Phaeton
	+ Juvin = Jupiter
	+ Chronox = Saturn
	+ Urus = Uranus
	+ Norex = Neptune
	+ Krios = Planet Ten
	+ Etida = Planet Nine
* The Algo System is 37 800 light years away from Nebulus A\*, Algokalaktos' supermassive black hole.