posted on Oct, 13 2005 @ 03:11 PM
1. Gravity has nothing to do with how fast a planet is spinning. It's a function of mass. Your attraction to the planet (and the planet's
attraction to you, no matter how infinitesimal). You are attracted the the planet's center of mass, and the attraction decreases geometrically the
further you get from the planet's center of mass.
2. Gas Giants are largely liquid/gas. You may remember from high school that temperature varies with pressure and volume. What this means is, the
gravity on Jupiter is so high, that atmospheric gasses (mostly methane) are under such pressure that they are liquified. So, because a planet the
size of jupiter is SO BIG, it will liquify it's own atmosphere and even it's metalliod core. So, way too hot and pressurized to be
"earth-like." mars would be a lot closer.
3. In the classic 80's series "Cosmos," Astronomer Carl Sagan speculated about life forms that might be possible in the upper atmosphere of
Jupiter. Even commissioned some paintings of them. [I still have an autographed copy of the companion book]. Extraterrestial life had been Sagan's
specialty back in the 60's, and hit was he and Drake who did the original calculation of the possibility of intelligent life on other worlds.
Incidentally, the Hubble telescope refuted the suppositions of Sagan's calculations, showing them off by several orders of magnitude, and also
implying that the known universe is statistically unlikely to have another civilization capable of communicating by radio-wave electromagnetism OR