Commented on 2008-09-12 02:04:46 In reply to szaromir
Posted by szaromir
Well, gravty fields can nullify each other, so there potentially exist places or points of zero gravity acceleration but it's rather improbable. Still, it doesn't explain weightlessness in space :)
no the dominant gravitational pull will overtake the other such as pluto and its similarly sized moon
First things first, there is no such thing as Zero-G, there is ALWAYS some gravity affecting all bodies in space, at least in our known universe.
Sure, it weakens so much by distance that it is essentially unnoticeable if you are up in orbit, etc. But even if you were between 2 galaxies, it wouldnt be Zero-G, there would still be the gravity from the 2 galaxies affecting you, altough so slightly that it wouldnt make any difference.
Secondly, the reason a satellite is in orbit isnt due to gravity or lack of gravity, its due to the fact that the satellite is moving in a straight line, at the correct speed, and by the curvature of spacetime (due to the gravity well, as in Earth) it happens to move in circles, even though its really moving straight, but in the curved space.
This is also what explains weightlessness in orbit.. Your orbital speed / trajectory nullifies the "pull" of the gravity well. And the walls of the spaceship obviously isnt enough to have a noticeable effect on your body ^_^
Thirdly, why the hell is that short-haired godzilla lookalike guy in the video always going from talking to whispering, SPEAK UP! :P
satellites circle the earth like the moon not whatever you said and it is becuase of gravity baleur do some research and maybe your results will be relivent to actual facts
Commented on 2008-09-13 18:55:30 In reply to pUMBa305
Posted by pUMBa305
satellites circle the earth like the moon not whatever you said and it is becuase of gravity baleur do some research and maybe your results will be relivent to actual facts
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All comments (31)
Commented on 2008-09-11 13:14:58
Commented on 2008-09-12 02:04:46 In reply to szaromir
Commented on 2008-09-12 04:29:44Sure, it weakens so much by distance that it is essentially unnoticeable if you are up in orbit, etc. But even if you were between 2 galaxies, it wouldnt be Zero-G, there would still be the gravity from the 2 galaxies affecting you, altough so slightly that it wouldnt make any difference.
Secondly, the reason a satellite is in orbit isnt due to gravity or lack of gravity, its due to the fact that the satellite is moving in a straight line, at the correct speed, and by the curvature of spacetime (due to the gravity well, as in Earth) it happens to move in circles, even though its really moving straight, but in the curved space.
This is also what explains weightlessness in orbit.. Your orbital speed / trajectory nullifies the "pull" of the gravity well. And the walls of the spaceship obviously isnt enough to have a noticeable effect on your body ^_^
Thirdly, why the hell is that short-haired godzilla lookalike guy in the video always going from talking to whispering, SPEAK UP! :P
Commented on 2008-09-13 01:47:20
Commented on 2008-09-13 18:55:30 In reply to pUMBa305
Commented on 2008-09-15 01:25:10 In reply to szaromir