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Fool Count

(1,230 posts)

4. Not really. As the gravitational acceleration goes as M/R^2, where M is planet's mass and R is

Reply to 1620rock (Reply #2)

Thu Feb 2, 2012, 07:04 PM

Feb 2012

its radius, and, assuming the same density, the mass goes as R^3, the gravity would increase
linearly with radius. For a planet 4.5 times more massive than Earth the radius will only be
1.65 times that of the Earth's radius and so will the gravity. Sure, one would feel a bit (1.65 times)
heavier, but it is still quite a livable environment for humans.

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Newfound super-Earth planet might support life, scientists say! [View all] Better Believe It Feb 2012 OP

Love all the exoplanet news, hate how every other article puts words in peoples' mouths. (nt) Posteritatis Feb 2012 #1

4.5 times as massive as Earth? Too much gravity for our species I think. 1620rock Feb 2012 #2

Not really. As the gravitational acceleration goes as M/R^2, where M is planet's mass and R is Fool Count Feb 2012 #4

In order to reach it, we would have to travel at the speed of light, RebelOne Feb 2012 #3

It's not like there is a lot of less distant alternatives. Fool Count Feb 2012 #5

If it only takes 28 days for one lap MattBaggins Feb 2012 #6