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Summarhús 2010
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on October 14 2012 21:44:03
One helluva ride is all I can say
The guy talking to him from mission control is Joe Kitinger, the only other man to jump above 100.000 feet. |
on October 15 2012 09:55:37
From the helmet cam: http://www.liveleak.com/view?i=ef7_1350270285 |
on October 15 2012 13:15:31
I wonder how far up you can get before you can't jump anymore?
Anyone done the math?  |
on October 15 2012 13:39:55
At some point the helium balloon ceases to be a useful mode of propulsion and then it's all about speed and ballistic trajectories, see escape velocity. |
on October 15 2012 14:03:35
He didn't jump - he fell...
Technically, you'd never reach an altitude where you're free of Earth's gravity; gravity never 'stops'. Felix experienced ~99% gravity at 39 km. The ISS experiences ~90% gravity at about 10 times Felix' altitude. Our Moon is at about 10.000 times Felix' altitude, and experiences Earth's gravity at 0.028%. At some point, I guess, gravitational strength would be so small that you would die of old age before experiencing falling anywhere. You could also find a point between the Earth and the Moon where the gravities of each object cancel each other out. |
on October 15 2012 14:27:16
RE escape velocity; there is actually a point where the escape velocity is so small, that if imaginary Felix actually did jump up from the board he was standing on, he would drift away from Earth, instead of falling towards it. Using a jump speed of 1.5 m/s I calculate that altitude to be ~350 milliard km. Venus is 38 million km away at its closest, so my calculations might be moo. |
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Awesome
