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Perhaps I say it as should not, but that is oversimplified to the point of inaccuracy. Joel Send a noteboard - 15/10/2012 11:16:50 PM
First, really consider how massively HUGE Earth is...

...and yet, its gravitational force is countered and its acceleration record broken by such pitiful creatures as us everyday without the slightest wonder that it should be possible.

An entire Earth's worth of gravity is still a real wimp.

Jumping on trampolines or boarding airplanes cannot overcome Earths gravity, after all. It takes a LOT of force for even small amounts of matter to escape the planet. Even the shuttle could not; rather than humans overcoming Earths gravity "every day," we only had that ability for the six years or so the Saturn V was in service.
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This message last edited by Joel on 15/10/2012 at 11:28:32 PM
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Science Question imlad - 13/10/2012 09:01:08 PM 564 Views
In general, effects of gravity on a nanoscale system are negligible. jh - 13/10/2012 09:54:50 PM 406 Views
To get an intuition of how weak gravity is... Burr - 13/10/2012 10:33:14 PM 355 Views
Perhaps I say it as should not, but that is oversimplified to the point of inaccuracy. Joel - 15/10/2012 11:16:50 PM 455 Views
What channel was this on? LordPerrin - 13/10/2012 10:44:29 PM 373 Views
It was an episode of Nova from PBS imlad - 14/10/2012 06:50:24 PM 495 Views
You can calculate gravity pretty precisely, but let me explain conceptually how we know Isaac - 14/10/2012 03:54:40 AM 402 Views
thanks all (and some more Qs) imlad - 14/10/2012 07:30:04 PM 383 Views
You're welcome and some more A's Isaac - 15/10/2012 01:40:01 AM 389 Views
Then I have another question imlad - 16/10/2012 05:52:33 PM 369 Views
You can rest easy. Burr - 16/10/2012 08:46:37 PM 408 Views
the part that bothers me actually is imlad - 16/10/2012 11:16:04 PM 339 Views
He's talking about the Andromeda Paradox Isaac - 17/10/2012 07:11:01 AM 346 Views
well, I feel a bit better LOL imlad - 17/10/2012 10:58:18 PM 341 Views
Re: well, I feel a bit better LOL Isaac - 18/10/2012 04:06:26 AM 344 Views
I saw Brain Greene speak last year. It was pretty cool. Darth_Katie - 16/10/2012 04:15:00 AM 524 Views
only two scientists I'd like to meet more imlad - 16/10/2012 05:53:20 PM 368 Views
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