a red dwarf star that is 1/7 the diameter and about 1/8 the mass of the Sun.
average density is about 40 times that of the Sun.
Although it has a very low average luminosity, Proxima Centauri is a flare star that undergoes random increases in brightness because of magnetic activity.
Searches for companions orbiting Proxima Centauri have been unsuccessful, ruling out the presence of brown dwarfs, supermassive planets, or super-Earths within the star's habitable zone
Since it is a red dwarf and a flare star, whether a planet orbiting this star could support life is disputed.
UN Forces resupply base in asteroid belt
Small colony / emergency retreat-from-Earth base on inner planet
a binary star system that consists of two red dwarf stars in a nearly circular orbit with a separation of about 147 AU. Both stars in this pair exhibit variability due to random flares, and they have been given variable star designations. (The brighter member Groombridge 34 A is designated GX And, and the other member is designated GQ And).
As of 2010.06.23, four planets have been discovered orbiting the star. It is one of only a few red dwarfs with known extrasolar planets and the second known example of a Laplace orbital resonance (inner three planets have a resonance of 1:2:4).
Gliese 876 d Possible that the planet is terrestrial, a very small Neptune-like gas giant or a type intermediate between both.
a low-mass planet estimated to have a mass between 6 and 8 that of Earth (it can be categorized as a "Super-Earth", or possibly a "Gas-Dwarf".)
has an orbital period of 1.94 days at a distance of 0.021 AU.
its orbit brings it so close to the surface of the star that temperatures in the 200-400ºC range are most likely -- conditions not hospitable for Earth-style carbon-base life forms.
Gliese 876 c is likely to be a gas giant with no solid surface. Assuming a composition similar to Jupiter and an environment close to chemical equilibrium, the planet is predicted to have a cloudless upper atmosphere.
roughly half the size of Jupiter.
has an orbital period of 30.12 days at a distance of 0.13 AU.
lies at the inner edge of the system's habitable zone. While the prospects for life on gas giants are unknown, it might be possible for a large moon of the planet to provide a habitable environment. Unfortunately tidal interactions between a hypothetical moon, the planet, and the star could destroy moons massive enough to be habitable over the lifetime of the system. In addition it is unclear whether such moons could form in the first place.
Gliese 876 b the first planet to be discovered orbiting a red dwarf star. Is likely to be a gas giant with no solid surface. Assuming a composition similar to Jupiter and an environment close to chemical equilibrium, it is predicted that the atmosphere is cloudless, though cooler regions of the planet may be able to form water clouds.
Has a mass 2.2756 times that of Jupiter.
has an orbital period of 60.02 days at a distance of 0.21 AU.
lies within the habitable zone. While the prospects for life on a gas giant are unknown, large moons may be able to support a habitable environment. Models of tidal interactions between a hypothetical moon, the planet and the star suggest that large moons should be able to survive in orbit for the lifetime of the system. On the other hand, it is unclear whether such moons could form in the first place.
Gliese 876 e the first planet to be discovered orbiting a red dwarf star. Is likely to be a gas giant with no solid surface. Assuming a composition similar to Jupiter and an environment close to chemical equilibrium, it is predicted that the atmosphere is cloudless, though cooler regions of the planet may be able to form water clouds.
has a mass similar to that of the planet Uranus.
has an orbital period of 124.26 days at a distance of 0.3343 AU.
The stars are about 3,750 AU apart. The stars revolve around each other once in over a million years.
Zeta1 Reticuli
Zeta2 Reticuli
Gas Giant
Acheron: a 12,201 km moon. Bears a strong resemblence to Saturn's moon, Titan.
possiblity of an Exo-Kuiper Belt, with a semi-major axis of 100 AU.
39.7 light years: York Star System
York a
York b
Endebald
Emigrant planet.
History
2040: investigation begins.
2043: investigation of the planet ends.
2045: Planet Endebald passes under Unified Forces control.
41.3 light years: Laramis star system
Laramis a
Laramis b
Laramis c
Laramis d
Sephira
Unified Forces Emigrant Planet
History:
2033 - The Macross 4 Super Long Range Emigration Fleet finishes terraforming the planet. Emigration begins with approximately one million emigrants.
2050 - inhabited by approximatively six millions people.
41.9 light years: Bellfan
Unified Forces Emigrant Planet
History: 2030.04: Dancing Skull Special Forces Team rescue Unified Government Chairperson Lawrence Yun Kemal, who is being held hostage by Anti-UN Forces.
Upsilon Andromedae was both the first multiple-planet planetary system to be discovered around a main sequence star, and the first multiple-planet system known in a multiple star system.
Upsilon Andromedae A
a yellow-white dwarf star that is somewhat younger than the Sun
1.3 solar masses.
As of 2010, four confirmed extrasolar planets are known in orbit around the primary star. All four are likely to be jovian planets that are comparable to Jupiter.
Upsilon Andromedae b (occasionally referred to as Upsilon Andromedae Ab)
one of the first hot Jupiters to be discovered.
likely to be a gas giant with no solid surface.
has an orbital period of 4.617 days at a distance of 0.0595 AU.
temperature on the two sides has been measured as ranging from -20 to -230 degrees to about 1,400 to 1,650 degrees Celsius. The temperature difference has led to speculation that it is tidal locked with the same side always facing Upsilon Andromedae A.
unlikely to have large moons, since tidal forces would either eject them from orbit or destroy them on short timescales compared to the age of the system.
Upsilon Andromedae c
likely to be a gas giant or brown dwarf with no solid surface.
has an orbital period of 241.2 days at a distance of 0.830 AU. The orbit is eccentric, more so than any of the major planets in our solar system (including Pluto). If placed in our solar system, Upsilon Andromedae c would lie between the orbits of Earth and Venus.
has a mass about 13.98 times the mass of Jupiter; which narrowly exceeds the 13-times-the-mass-of-Jupiter dividing line between planets and brown dwarf stars.
Upsilon Andromedae d
likely that it is a gas giant with no solid surface and surface gravity of over 25 times that of Earth.
has an orbital period of 1,290.1 days at a distance of 2.54 AU. The orbit is eccentric, more so than any of the major planets in our solar system (including Pluto).
has a mass about 10.25 times the mass of Jupiter.
lies in the habitable zone. Simulations suggest that even on eccentric orbits, terrestrial planets may be able to support liquid water throughout the year. This suggests that if sufficiently large moons exist, they may be able to support extraterrestrial life.
Upsilon Andromedae e
a Jupiter Twin as it has a mass slightly greater than Jupiter's.
has an orbital period of 10.5374 years at a distance of 5.2456 AU.
has a mass about 10.25 times the mass of Jupiter.
the planet's orbit is more circular than that of any of the planets in our solar system.
Upsilon Andromedae B
a red dwarf
located in a wide orbit 750 AU from the primary star.
45.6 light years; Dahan
Unified Government Emigrant Planet
History: 2029 - Dancing Skull Special Forces Team intercepts forces from a warship of the Zentraadi terrorist organization Struggle at Satellite Orbit.
the prototype for a class of planets called hot Jupiters.
orbital period of 4.23 days at 0.052 AU.
minimum mass is half that of Jupiter, but probably has a greater radius despite it's low mass. This is because its superheated atmosphere must be puffed up into a thick but tenuous layer surrounding it. Beneath this, the gases that make up the planet would be so hot that the planet would glow red. Clouds of silicates may exist in the atmosphere.
tidally locked to its star, always presenting the same face to it. Assuming the planet is perfectly grey with no greenhouse or tidal effects, and a Bond albedo of 0.1, the temperature would be 1265K.
As of 2005, two planets have been discovered orbiting the star. It's been speculated that the planetary system has been formed in a very turbulent disc.
HD 128311 b
has minimum mass 2.19 Jupiter masses.
has an orbital period of 1.256 years at a distance of 1.1 AU.
has an eccentric orbit.
HD 128311 c
has minimum mass 3.22 Jupiter masses.
has an orbital period of 2.54 years at a distance of 1.76 AU.
will approach within 1.1 light years (70,000 AU) from Earth within 1.4 million years; whose combination of mass and close approach distance will cause the greatest gravitational perturbation of our solar system. Specifically, it has the potential to perturb the Oort cloud enough to send a shower of comets into the inner solar system, possibly causing an impact event.
65.1 light years; Beneb Star System
Unified Government Emigrant Planet
AVFF Angel Wings (Aegis Focker was unit leader in 2048)
66.9 light years; Neo Edo
Emigrant Planet founded by 'The Samurai of the SDF-1' (the 'Samurai' is a master of several advanced forms of Japanese martial arts. He is credited for keeping the traditional fighting styles alive (Kaifun is credit with the Chinese forums). 'The Samurai' played himself in 2031's DYRL movie. All modern masters of Japanese style martial arts learned directly from him. He is considered a cultural treasure).
Neo Edo is modern emigrant planet. Officers in the Emigrant Planet military carry swords. Tourists are surpised to find that not everyone on the planet knows karate. Wannabe Ninjas consider the planet a holy place. Residents think they are crazy.
a close binary of A with a projected separation of 73 AU.
16 Cygni B
may be a red dwarf.
a trinary of A at a distance of 860 AU. Plausible orbits range in period from 18,200 to 1.3 million years, with a semimajor axis ranging from 877 to 15,180 AU. In addition B orbits between 100 and 160 degrees inclination, that is against the A-C pole, such that 90 degrees would be ecliptical.
16 Cygni Bb the first eccentric Jupiter to be discovered.
has a minimum mass of 1.68 Jupiter masses, and a maximum of 13 Jupiter masses (making it a low-mass brown dwarf).
has an orbital period of 798.5 days at a distance from 0.54 to 2.8 AU.
This high eccentricity may have been caused by tidal interactions in the trinary star system, and the planet's orbit may vary chaotically between low and high-eccentricity states over a period of tens of millions of years.
it experiences extreme seasonal effects. Despite this, simulations suggest that an Earth-like moon would be able to support liquid water at its surface over the course of a year.
71.9 light years; Hydra
Unified Government Emigrant Planet
History: 2036.08.09: Isamu Alva Dyson participates in the Hydra Civil War.
It is a multiple star system composed of four stars, which are organised into two pairs.
Regulus A
a blue-white main-sequence star
3.5 solar masses.
spinning extremely rapidly, with a rotation period of only 15.9 hours, which causes it to have a highly oblate shape. If it were rotating only 16% faster, the star's gravity would provide insufficient centripetal force to hold it together, and it would tear itself apart.
Regulus D
A's companion star.
probably a white dwarf star.
at least 0.3 solar masses.
approximately 40 day orbit around A and D's common centre of mass.
Regulus B
a smaller dim dwarf main-sequence star.
around 4,200 AU from A.
Regulus C
a small dim red star.
B's pair.
orbital period of 2,000 years at 100 AU.
81.1 light years; Neo York
One of the first emigrant planets established by the Humankind Seeding Project.
New Alabama Lake Unified Space Forces Replenishment Base
History:
2014 (before): Unified Government Emigrant Planet
2020: Free York Liberation League launches two attacks to capture a VF-5000 being tested aboard the Unified Forces cruiser Algenicus over the planet.
84.8 light years; Cristrania
Unified Government Emigrant Planet
New Nile Weaponry Base. [Annihilation] battle of the base, 2018.
91.4 light years: New Asia
Unified Government Emigrant Planet
Protoculture Ruins
Abandoned Unified Forces (Secret Relics) Biological Weapons Research base at the Protoculture ruins. Base deemed a biohazard and destroyed in 2022.
92.6 light years: Barnard
Unified Government Emigrant Planet used by the Unified Space Forces in 2040.
About 7.3 million years ago it passed within 9.8 light years. Because the total mass of the system is 5.8 solar masses, and despite the fairly large distance at closest approach, this may have been enough to slightly perturb the solar system's Oort cloud and increase the number of comets entering the inner solar system.
Beta Persei A
a main-sequence star
3.59 solar masses.
Beta Persei B
sub-giant star.
0.79 solar masses.
orbital period 2.87 days at 0.062 AU.
Beta Persei C
a smaller dim dwarf main-sequence star.
1.67 solar masses.
orbital period 680.05 days at 2.69 AU.
97.1 light years: Zentrapolis
A (large) Emigrant Planet started by allied Zentraadi and Meltrans who adopted Earth's culture but wished to live on their own. A Unified Government ambassador and embassy staff stay on to make sure they don't go back to their old ways.
Population: 150,000 (Meltran/Zentran).
Government: Self-Govern, Unified Government Ambassador.
UN 15%, Anti-UN 15%, Self/Other 70%.
Type: Self-Governing Zentraadi Emigrant Planet.
Military:
Colony Defence Force:
x2 Zentraadi Mobile Weapon Battalions.
x3 Picket Ships.
x2 Battleships
Unified Forces
x1 UNSM Infantry Platoon (at the Unified Government Embassy)
