Space/Science — HabitableZone

Space/Science » in reply to Gliese 876d...

200-400 degrees????

Total bulldust, IMHO.

10 times closer than Mercury? If Gliese 876 is Sol-like then that's 100 times the thermal radiation as Mercury. Luckily there's a 4th power law (Stefan's Law) in radiating away heat so this planet would "only" be 3 times hotter than Mercury.

Mercury has a mean surface temperature of ~ 425 K, so we're looking somewhere around 1300K. That's hot enough to melt iron and most rocks, so this is going to be a magma planet.

No oceans, no atmosphere, no life as we know it, Jim...

It decidedly is NOT "Earth-like" in anybody's book.

Log in or register to post.

The whole thread (25 posts)