Top 5 Potentially Habitable Alien Planets
This rocky world was announced in September 2010. Gliese 581G, whichis located just 20 lightyears away, is likely two to three times as large as Earth and zips around its parent star every 30 days or so.This orbit places the planet squarely in its star’s “habitable zone” – that just right range of distances where liquid water, and life as we know it, could exist.
Gliese 667Cc, which was discovered in February 2012 by the same core team that spotted Gliese 581G, orbits a red dwarf 22 light-years away, in the constellation Scorpius (The Scorpion). The alien world is so-called “super Earth” that’s at least 4.5 times as massive as our Planet and it completes an orbit every 28 days. At least one other one other planet circles the star Gliese667C, which is part of a triplestar system.
Kepler-22B was spotted by NASA’s planet-hunting Kepler space telescope in December of 2011.It’s a super-Earth about 2.4 times as wide as our planet.If the greenhouse effect operates on Kepler-22B like it does on Earth, the alien world would have average surface temperature of 72 degrees Fahrenheit/22 degrees Celsius, researchers have said.
HD 85512B is another super-Earth,one that is thought to be 3.6 times as massive as our planet.The alien world is found about 35 light-years from us,in the direction of constellation Vela (The Sail).Estimated surface temperature is 77 degrees Fahrenheit/25 degrees Celsius.
This world, which is nearly seven times as massive as our Earth, orbits a bit farther than its planet sibling Gliese 581G.When 581D first discovered in 2007,many scientists regarded it as too cold to be potentially habitable.In the years since,however,atmospheric-modeling studies have suggested that the planet may indeed be able to support the life as we know it – provided 581D is warmed by a greenhouse effect.