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To: molson209

The gravity on such a large planet could be similar to earths. Gravitational attraction is a function of mass and diameter; if the density of the planet is low, a huge planet could have surface gravity similar to our own.


19 posted on 12/17/2011 5:38:32 PM PST by muir_redwoods (No wonder this administration favors abortion; everything they have done is an abortion)
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To: muir_redwoods

“The gravity on such a large planet could be similar to earths. Gravitational attraction is a function of mass and diameter; if the density of the planet is low, a huge planet could have surface gravity similar to our own.”

That’s the premise to Jack Vance’s 1952 classic “Big Planet” sci-fi novel. Great book. But anything Vance does is great.

Freegards


25 posted on 12/17/2011 6:55:18 PM PST by Ransomed
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