Milky Way Galaxy Atlas


Planet Earth (Warm Terran)
Our ultimate goal as a species is to discover another planet that is like Planet Earth! The following list of planets are the ones that are closest to being Earth-like given the amount of data that is currently available. It should not be assumed that a planet is in any way habitable like Earth just because it appears in this list. There is much more data that must be gathered about these planets to determine how truly "Earth-like" they may be. To appear on this list, a planet must be in the habitable zone, be Terran size and mass, and have a temperature that is cold or warm.

There are currently 8 planets that appear on this list, including planet Earth.

For a Planet to be considered truly "Earth-Like" however, it must meet 11 criteria. These criteria in no way indicate that other planets that are not "Earth-like", are not habitable. A planet that is not "Earth-like" may still be habitable. However, these criteria simply provide us with a framework to determine how closely a planet may resemble Earth, and thus whether life as we know it could possibly inhabit such a planet. Each criteria also has a color associated with it. These colors are defined in the Galaxy Legend, and give a general idea of how a planet ranks within the framework of the Earth Similarity Class. Any criteria that is "green," means that the planet meets that criteria for being an "Earth-like" planet.

The 11 Criteria are as follows: whether a planet is in the habitable zone of their star (the area where liquid water could exist), if the planet is tidally locked (one side always faces its star), if the planet is subjected to intense solar flares from its parent star, size class, mass, density, diameter, atmospheric pressure, atmospheric composition, average global temperature, and whether it has liquid water. At this point, some of these planetary properties must still be refined and more accurately measured, and are subject to change given future data. The planet that is currently the most Earth-like found to date is the planet Ross 128 b. Ross 128 b is located 10.9190 light years from Earth.



Atmosphere Composition

#1

0

Yes

No

Moderate
Flares

Terran

1.00
(EM)

5.52

7,918
(Miles)

1.00

78% Nitrogen
21% Oxygen
56.93
(F)
(Warm)

Yes





#2
Ross 128

b

10.9190

Yes

Yes


Moderate
Flares

Terran

1.35
(EM)

Unknown

8,610
(Miles)

Unknown

Unknown

73
(F)
(Warm)

Unknown





#3
Kepler 186

f

490.000

Yes

50%
Chance

Moderate
Flares

Terran

1.40
(EM)

Unknown

8,607
(Miles)

Unknown

Unknown

-121.27
(F)
(Cold)

Unknown





#4
Trappist f

39.130

Yes

Yes

Moderate
Flares

Terran

0.680
(EM)

Unknown

8,274
(Miles)

Unknown

Unknown

-65.47
(F)
(Cold)

Unknown





#5
Trappist e

39.130

Yes

Yes

Moderate
Flares

Terran

0.620
(EM)

Unknown

7,269
(Miles)

Unknown

Unknown


Unknown


Unknown





#6
Trappist g

39.130

Yes

Yes

Moderate
Flares

Terran

1.340
(EM)

Unknown

8,924
(Miles)

Unknown

Unknown


Unknown


Unknown





#7

473.000

Yes

Yes

Intense
Flares

Terran

1.300
(EM)

Unknown

8,710
(Miles)

Unknown

Unknown

37.13
(F)
(Cold)

Unknown





#8

4.240

Yes

Yes

Intense
Flares

Terran

1.300
(EM)

Unknown

8,710
(Miles)

Unknown

Atmosphere Likely Lost
from Solar Flares

-51.07
(F)
(Cold)

Unknown