If found to have an atmosphere, GJ 357 d could be promising for future human colonization © NASA’s Goddard Space Flight Center/Chris Smith.
While monitoring the star named GJ 357, which sits just 31 light years away in the constellation Hydra, the space agency’s Transiting Exoplanet Survey Satellite (TESS) caught the star dimming every 3.9 days, indicating the presence of at least one transiting exoplanet.
After some further solar sleuthing, the researchers came across a clutch of planets, the most promising of which, GJ 357 d, has conditions which indicate that it could sustain life.
Watch the following video presentation by NASA:
Given its position relative to its star, the NASA boffins estimate that it receives similar amounts of solar energy that Mars receives from our sun. So far so good.
“This is exciting, as this is humanity’s first nearby super-Earth that could harbor life,”gushed one of the lead astronomers, Lisa Kaltenegger.
They are now hoping to discover that the planet has a dense atmosphere that can trap enough heat to warm it and allow liquid water on its surface.
Without an atmosphere, however, the planet likely has an equilibrium temperature of around -64 Fahrenheit (-53 Celsius), which would make it a frozen hellscape and likely nigh on impossible to colonize without expending vast resources – ice picks at the ready, everyone.
TESS, which is designed to comb the universe for habitable worlds, also found two other planets orbiting the star.
GJ 357 b is estimated to be about 22 percent larger than Earth and it orbits the star 11 times closer than Mercury orbits our own sun, gaining it the moniker ‘hot Earth’…
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