Android: float GRAVITY_DEATH_STAR_I
code.google.com
code.google.com
also, i just noticed a GRAVITY_THE_ISLAND a couple more lines down. what?
However, while I haven't watched every episode of Lost I think it'd be a lot more noticeable if gravity there was 4.815162 times regular Earth gravity. Everybody would be crawling around, for starters.
That'd make island gravity roughly half of regular Earth gravity.
So the Death Star would be considerably lighter than your friend's calculation.
My calculations give 3.385e13 kg assuming a radius of 80 km which yields a density of 1.578e-2 kg/m3 or 15.78 g/m3 which is way, way low. In fact it's much lower than the density of air.
Three possibilities: I made a mistake in my calculation, Google's gravity value for the Death Star is incorrect, we shouldn't expect consistency from a story George Lucas made up almost 40 years ago.
;)
I hope that Randal from Clerks is credited in the author's acknowledgements.
Future versions of Android may feature GRAVITY_DEATH_STAR_II
The same is true of the constants for the planets, but at least they are (mostly) solid and not designed to be lived inside of.
http://www.amazon.com/Essential-Guide-Vehicles-Vessels-Star/...