Calculating a planet's mass & gravitational pull

[Baron Munchausen]

Originally posted by dogscoff:

Tomorrow I'm going to have a go at putting all of this functionality into java so I can offer it on my website.
Planned features:
-flexible input values (ie it can automatically calculate circumference from diameter or vice versa.)
-Side by side comparison with a selectable "benchmark" planet (Earth, Mars, Jupiter, Plenty... any others I should have?
-Choose between raw data comparison or proportional comparison (ie Planet X has 125% earth's land surface area)
-Variable input units (miles or kilometres etc)

Anyone likely to use this? I doubt it will see a lot of usage, but thought it might be a handy toy for sci-fi writers. Any particular features I ought to implement? Even if no-one wants it I'll do it anyway as a programming excercise for myself.[/QB]

Aaron Hall? You ought to share it with him. It might improve SE V.