It’s warm, it’s wet, and it’s a mere 300,000 year trip away!
Meet Gliese 581d, a world twice the size of Earth. It orbits the red dwarf star Gliese a mere (on an astronomical scale) 20 light years away.
While this is not the first discovery of Gliese 581d, it had been written off previously as a candidate for life. New reports of the system have changed that opinion.