gee, they found Darkover...

[ljgeoff]

Gliese 581 50% bigger than earth and 5X more massive, so I'm thinking we'd be squished like bugs from the gravity. Anybody know what the g's would be on this lady?

Comments

[james-nicoll.livejournal.com]

2.2ish, I've seen. It will be a little higher than it would be if we just scaled Earth up 5x in volume, because the planet's mass will compress it a bit.

[johnpalmer.livejournal.com]

That's right, given the estimates of diameter and mass. 5x the mass over 1.5^2 is 5/(1.5*1.5) = 1/.45 = 1/(9/20)= 20/9 = 2.2, as

(Since acceleration is mass * constant/r^2)

[ljgeoff.livejournal.com]

2.2 ... hmm ... I wonder what's swimming in that ocean?