Milky Way Galaxy Atlas


Planet Note: Planets have been categorized according to mass, diameter, and temperature. However, these three criteria are still subject to change since data is preliminary and incomplete. Some planets also have a calculated ESI. Several criteria are used to calculate a Planet's ESI, or Earth Similarity Index. ESI is an indicator of how "Earth-like" a planet may be, based upon the following criteria: mass, diameter, density, if it has an atmosphere, if that atmosphere is Earth-like, temperature, if it's in the habitable zone, if it has liquid water, if it has a moon to stablize its orbit, if it is tidally locked, and if it has a magnetic field. ESI is given as a percentage, with Earth being equal to 100%. Most planets that are listed will not have a calculated ESI due to incomplete data. In fact, only the planets in our solar system have an ESI calcluated. ESI does not nessarily indicate that a planet is "habitable" or can support life as we know it. ESI only gives a general indication about what type of planet it may be according to currently available data.

In addition, any planet that has a green background, is located within the "habitable zone" of that star. The habitable zone of a star is defined as the area around a star where liquid water could possibly reside on a planet, given that the planet has sufficient atmospheric pressure and a temperature that allows for liquid water. It does not indicate that a planet will be "habitable" just because it's located within that star's habitable zone.

Star Types

PSR
B1620-26

12,400.000
Neutron | Neutron

b
PSR B1620-26 b (Freezing Jovian) ESI Unknown
23 AU















OGL-2014
BLG-0124L

13,000.000
?

b
OGL-2014-BLG-0124L b (Jovian) ESI Unknown
3.1 AU















OGL-2005
BLG-390L

21,500.000
M ?

b "Hoth"
OGL-2005-BLG-290L b (Freezing Super Terran) ESI Unknown
2.6 AU















OGL-2008
BLG-355L

22,179.000
?

b

? AU















Pistol
Star

25,900.000
LBV


















GCIRS
13E

25,997.000
Black Hole ?


















Source 1
(S1)

26,000.000
?


















Source 2
(S2)

26,000.000
B1V



















Source 5
(S5)

26,000.000
?



















Source 8
(S8)

26,000.000
?



















Source 12
(S12)

26,000.000
?



















Source 13
(S13)

26,000.000
?



















Source 14
(S14)

26,000.000
?



















Source 16
(S16)

26,000.000
?



















Source 19
(S19)

26,000.000
?



















Source 20
(S20)

26,000.000
?



















S0-102

26,000.000
?


















Sagit-
tarius
A

26,000.000
Central Supermassive Black Hole