Alpha Centauri System

Alpha Centauri System stars compared to Sol in real size with the planets orbiting their parent star in order of proximity to the star. (only planets, no dwarf planets is mentioned)

## System Statistics

### Location

Local Interstellar Cloud, Local Bubble, Orion–Cygnus Arm, Milky Way

## Star Info

### Star Name(s) & Type(s)

ACA (G2V), ACB (K1V), Proxima (M Red Dwarf)

## Additional Facts

### Species

Humans

**Location:** Milky Way Galaxy/Local Cavity

**Alpha Centauri** (Also known as Alpha System) is a trinary star system and also closest to Sol. It has a class G star named Alpha Centauri A, one Class K named Alpha Centauri B and one M class red dwarf named Proxima Centauri. The system has 9 rocky planets, 7 gas giants and 6 dwarf planets. 7 of them orbit Alpha Centauri A, 12 around B and 3 of them orbit Proxima Centauri. There is also an asteroid disk at the outer edge of the system.

There are 4 planets and 31 moons in the habitable zone of this system with one the moons called Pandora harboring life.

Alpha Centauri is heavily colonized by Humanity since 22nd century. It is also the first place that Humanity found the remains of an advanced unidentified sapient species designated "The Architects".

## Stars

Alpha Centauri is a triple star system, with its two main stars, Alpha Centauri A and Alpha Centauri B, being a binary component. The *AB* designation, or older *A×B*, denotes the mass center of a main binary system relative to companion star(s) in a multiple star system. *AB-C* refers to the component of Proxima Centauri in relation to the central binary, being the distance between the center of mass and the outlying companion. Because the distance between Proxima (C) and either of Alpha Centauri A or B is similar, the AB binary system is sometimes treated as a single gravitational object.

## Planetary Bodies and Moons

### Planets

The system has 22 planetary bodies overall, with seven of them orbiting Alpha Centauri A, twelve around B and three orbiting Proxima. Three of them lie within the habitable zone, two in Alpha Centauri A and one in Proxima. Due to the Solar System bodies having mostly Roman names, Alpha Centauri planets and moons were given Greek names.

#### Alpha Centauri A

The planets orbiting Alpha Centauri A in order are: Aether, Thanatos, Oceanus, Polyphemus (a gas giant and parent planet of life harboring moon Pandora), Crius, Thalassa, Ephron (Last two are dwarf planets).

#### Alpha Centauri B

Planets orbiting Alpha Centauri B in order are: Vulcan (inside Mercury's orbit), Hermes (Mercury), Aphrodite (Venus), Gaea (Earth), Ares (Mars), Zeus (Jupiter), Cronus (Saturn), and Poseidon (occupies the equivalent of Neptune's orbit), Mnemosyne, Adephagia, Eucleia, Nomos (Last four are dwarf planets).

#### Proxima

Planets orbiting star Proxima in order are: Heracles (an ancient Ocean World which lies within the habitable zone but has no atmosphere and therefor no liquid water), Hector (a Hydrocarbon World similar to Titan), Achilles (a mini-Neptune under Helium-3 mining).

### Moons

Alpha Centauri is home to hundreds of naturals satellites some even larger than Mars and even Earth. Most notable moon of the system is Pandora, an Earth-like body with indigenous biosphere and even sapient life.

## See Also

* **Alpha Centauri System in AVATAR Fandom**
* **COSTIN**
* **Cosmos Space Telescope**
* **Pandora**
* **Hesiod**
* **Gaia**
* **Hercules**
* **Olympus**

### Footnote(s)

1. Alpha Centauri lore is heavily inspired by the Movie AVATAR.