Alpha Centauri System

Alpha Centauri A from the ICP, circa 2150 CE

The **Alpha Centauri System** is a binary (sometimes called trinary) star system in the **Milky Way Galaxy.** It is the closest star system to **Terra** and the **Sol System**.

## Star Systems

### Alpha Centauri A

**Alpha Centauri A** is the largest star in the **Alpha Centauri System**. It has a mass about 1.1x that of **Sol** and a diameter 1.2x that of **Sol**.

#### Alpha Centauri Aa 'Fermi'

**Alpha Centauri Aa**, designated colloquially as **Fermi**, is the first planet out from Alpha Centauri A, it was discovered and photographed January 1st, 2150 CE. Fermi is a molten world with an orbital height of about 30 million miles.

#### Alpha Centauri Ab 'Olympus'

**Alpha Centauri Ab**, designated **Olympus**, is the largest planet in the entire Alpha Centauri system, with a mass comparable to almost 4 Jupiters. Olympus has a orbital height of about 6.5 billion miles, or seven astronomical units. Olympus is primarily made up of hydrogen and oxygen.

##### Alpha Centauri Aba 'Admudsen'

**Alpha Centauri Aba**, or **Admudsen**, is the first moon of Olympus and the first moon to be discovered in the **Alpha Centauri A** System. It has an orbital height of 1.6 million miles. Admudsen is a seemingly normal ice world, similar to **Ganymede**.

##### Alpha Centauri Abb 'Vandenburg'

**Alpha Centauri Abb**, called **Vandenburg**, is the second moon of Olympus. It has an orbital height of 1.9 million miles. It is very similar to **Mars** in its overall attributes and could possibly be terraformed in the far future.

##### Alpha Centauri Abc 'Adler'

**Alpha Centauri Abc**, nicknamed **Adler**, is the third moon of Olympus. It has an orbital height of 2.1 million miles. Adler is very similar to both **Admudsen** and **Mars**, suggesting they might be from the same planet that broke apart during formation.

##### Alpha Centauri Abd 'Druyan'

**Alpha Centauri Abd**, designated **Druyan**, is the fourth moon of Olympus. It has an orbital height of 4.8 million miles. Druyan was the first celestial body in the **Alpha Centauri System** to potentially have life, as scans from the **Innes Centauri Probe** suggest a highly oxygenated atmosphere. This along with the blue-green tint of the surface suggest a planet wide grassland, with scattered lakes and a single large ocean.

## Alpha Centauri B

Alpha Centauri B from the ICP, circa 2149 CE

### Species

Unknown

**Alpha Centauri B** is the second star of the **Alpha Centauri System**. It has a mass 0.9x that of **Sol** and a diameter 0.8x that of **Sol**.

#### Alpha Centauri Ba 'Innes'

**Alpha Centauri Ba**, officially designated **Innes**, is the first planet of **Alpha Centauri B** and the first planet to actually be photographed directly in the Alpha Centauri System. It was visited by the **Innes Centauri Probe** on August 6th, 2149 CE. It is a venus-like world with a thick carbon dioxide atmosphere and a possibly molten surface. It also has a large hurricane directly facing **Alpha Centauri B**. It has an orbital height of 40 million miles.

#### Alpha Centauri Bb 'Romulus' and 'Remus'

The **Alpha Centauri Bb System**, made of the planets **Romulus** and **Remus**. Both orbit eachother at a distance of about 550,000 miles. Both planets are comparable to **Mars** in composition, atmosphere, and size. They orbit **Alpha Centauri B** at a height of 213 million miles, or 2.3 Astronomical Units.

#### Alpha Centauri Bc 'Justinian'

**Alpha Centauri Bc**, named **Justinian**, is the third planet of the **Alpha Centauri B** system. It is the largest planet in the **Alpha Centauri System**, with a mass comparable to 2.7 Jupiters. It is made of hydrogen and water vapor, and looks similar to **Uranus**. It orbits **Alpha Centauri B** at a height of 483 million miles, or 5.3 Astronomical Units.

##### Alpha Centauri Bca 'Tribonian'

**Alpha Centauri Bca**, called **Tribonian**, is the first moon of **Justinian**. It has an orbital height of 670,000 miles. It is an ice world similar to **Ceres**.

##### Alpha Centauri Bcb 'Barsymes"

**Alpha Centauri Bcb**, named **Barsymes**, is the second moon of Justinian. It orbits at a height of 796,000 miles. It is very similar to **Tribonian** and **Ceres** is look and composition.

##### Alpha Centauri Bcc 'Narses'

**Alpha Centauri Bcc**, or **Narses**, is the third moon of **Justinian**. It has an orbital height of 894,000 miles. It is a frozen world, but scans suggest, like **Tiber**, that a subsurface ocean exists.

##### Alpha Centauri Bcd 'Belisarius'

**Alpha Centauri Bcd**, named **Belisarius**, is the fourth moon of **Justinian**. It orbits at a height of 3,695,000 miles. Belisarius is the largest moon in the **Alpha Centauri System**, with a diameter about 0.35x that of **Terra**. Belisarius sports a blue-green atmosphere made of Oxygen and Chlorine, and scans by the **Innes Centauri Probe** suggest a surface similar to **Titan's**.

##### Alpha Centauri Bce 'New Cappadocia'

**Alpha Centauri Bce**, designated **New Cappadocia**, is the fifth and final moon of **Justinian**. It orbits at a height of 5,334,000 miles. It is the second largest moon in the **Justinian System** with a diameter 0.94x that of **Mars**. New Cappadocia is similar to **Ganymede** or **Mars** in appearance, composition, and atmosphere, and some at the **United Nations Space Administration** speculate it could be terraformed.

#### Alpha Centauri Bd 'Theodora'

**Alpha Centauri Bd**, designated **Theodora**, is the fourth planet of the **Alpha Centauri B** System. It is the second largest planet in the system with a mass comparable to 1.7 Jupiters. It orbits Alpha Centauri B at a height of 660 million miles, or 7.1 Astronomical Units and is made primarily of hydrogen, helium, and water vapor, like **Justinian**.

##### Alpha Centauri Bda 'Hypatius'

**Alpha Centauri Bda**, or **Hypatius**, is the first moon of **Theodora**. It has an orbital height of 546,000 miles. It is a barren world similar to **Ceres**.

##### Alpha Centauri Bdb 'Tiberius'

**Alpha Centauri Bdb**, named **Tiberius**, is the second moon of Theodora. It's orbital height is 601,000 miles. It is also a barren world, like Hypatius, but owns an atmosphere similar to **Mars'** pre-terraforming atmosphere, which along with its own magnetic field, suggests it could also be terraformed in the far future.

##### Alpha Centauri Bdc 'Sophia'

**Alpha Centauri Bdc,** designated **Sophia**, is the third and last moon of Theodora. It orbits at a height of 623,000 miles. While scans show a rocky atmosphere, Sophia owns an atmosphere almost 5x as thick as Terras, which suggests that in its early history, it scooped some gas off of **Theodora**.

## Proxima Centauri

Proxima Centauri from the ICP, circa 2151 CE

### Species

Unknown

**Proxima Centauri**, sometimes called **Alpha Centauri C**, is the third star of the **Alpha Centauri System**. is orbits the Alpha Centauri Barycenter at a height of 33 Astronomical Units. It has a mass 0.1x that of **Sol** and a Diameter 0.2x that of **Sol**.

#### Proxima Centauri B 'Sagan'

**Proxima Centauri B**, designated **Sagan**, Is the only planet in the **Proxima Centauri** **System**. it orbits Proxima Centauri from 0.05 astronomical units away, or 4.6 million miles. from scans by the **Innes Centauri Probe**, Sagan is a world extremely similar to **Terra**, but with a colder climate about 10 degrees cooler than **Terra**. It hosts tundras, mountains, and ice caps. Sagan is the goal of many **UNSA** figures pushing for interstellar exploration.

### Tartarus

**Tartarus** is a planet orbiting the **Alpha Centauri** barycenter from 500 Astronomical Units away, or 46.5 billion miles. Not much is known about Tartarus because the **Innes Centauri Probe** did not get the chance to flyby it. but long-range scans suggest that Tartarus is a large gas giant with potentially 3-4 moons.

## Exploration

Human Civilization had known about the **Alpha Centauri** and **Proxima Centauri** systems since 1915 CE, and it had been the subject or numerous pushes in governments and the **UNSA** for interstellar exploration. Before the Innes Centauri Probe, astronomers studied Alpha Centauri and Proxima Centauri with ground and space-based telescopes, these methods were prominent in the discovery of **Alpha Centauri Ba (Innes)** and **Proxima Centauri B (Sagan)**. With the creation of the **Einstein Drive** in 2126, the **Innes Project** was put forward to build a probe that could flyby all systems and potential planets in the **Alpha Centauri System**. In 2144, the **Innes Centauri Probe** was launched, and it arrived in 2149. Its information was delivered back to **Terra** between January 2150 and March 2152. The **Innes Project** ha been the sole source for most of this article.

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