I think you have joined a couple of different concepts in your thinking.
1. A large enough mass becomes spherical because of its own gravity. Only smaller objects, like asteroids and Mars's moons can remain irregularly shaped.
2. Einstein's theory of general relativity provided us with the first theory of gravity. (Newton's statement is a law, not a theory. He said how gravity acts, not what causes is.) Einstein proposed that mass curves the space around it. We don't notice the curve of space, but the effect is that objects that are "really" travelling straight lines follow the curve of space (or space-time, actually). Their paths looked curved to us. We explain the (apparently) curved paths by saying that the objects are being attracted by a gravitational force coming from the mass.
So, looking at your question: Mass in space causes the curvature of space, resulting in what looks like the force of gravity to us. The force of gravity makes very large masses spherical.
2007-02-15 07:05:20
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answer #2
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answered by Rob S 3
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no.
Gravity (a strange phenomenal inward force) of some mass creates that spherical shape. Since Gravity is in the center, it pulls evenly from every side.. causing a sphere to form.
what happens is.. there is gravity coming from different planets.. that may pull a mass toward it. Every mass has a certain force inside it.. and the stronger force will pull that mass toward it, causing it to spin.. the spin (the other strange force) causes deviations from the normal sphere shape.
2007-02-15 06:01:56
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answer #5
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answered by Anonymous
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Particles precipitate like raindrops (spherical). The ancient atomic debris suspended everywhere is recycled when acted apon by any other action, such as creative intention ("The Big Bang", or "God thought and therefore It was", or "World Without End", or Alpha Omega...)
2007-02-15 06:07:53
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answer #6
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answered by Emee 3
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Hello there! :)
I sure hope you're doing well. :) You've more or less got the right idea of what's happening, but you're attributing the right action for the wrong "doer". Space is essentially nothing but a vacuum. I'm not too versed on astro-physics, so I can't tell you to where matter, anti-matter and dark matter, among others, trace their origins. (I'm not even sure if astro-physicists themselves know the origins of such materials!)
Anyway, this much is clear: at some point in time, there was an explosion (out of built-up pressure perhaps?!) that astro-physicists and astronomers call "The Big Bang". After everything accelerated outward, it eventually slowed down enough to coalesce, forming, amongst other things, stars and planets. These are composed of substances (like Hydrogen or Iron), which have mass.
In actual fact, it is mass that curves the space around it. Mass has a gravitational field and pull. Imagine stretching a bed-sheet and tying it to the ends of four poles and placing a bowling ball in the middle of the sheet. The sheet will bend to the ground, perhaps even touching or altogether resting on the ground, if the poles are short enough. When something like a comet or an asteroid passes by, its trajectory (the path of its motion) will be bent by that "curved bed-sheet" of the planet or star it is passing by. If the "curved bed-sheet" is strong enough, and especially if the object passes by close enough, it will be pulled into the star or planet!
Now, at first, when gasses and/or other substances were present during the formation of the star or planet, they simply clumped together, out of micro-magnetic attraction between their atoms and molecules. When they coalesced into a sizeable lump, it bent the space around it, as I've already said. The rest of the matter that was still joining the lump,now went down towards the centre of our "stretched out and curved bed-sheet". If you try this out, you'll find that the curvature forces the incoming matter to take a curved/circular path, not necessarily forming a sphere per-se, not yet.
Depending on what the substances in question are, depending on their atomic mass, and the mass of the quantity present, and, because of the mass (because of the effect of having to go down into the centre of the "bed-sheet" in order to join the rest of the "lump"), the speed at which the incoming matter is moving and turning round and round, and the speed at which the matter in the lump is settling down and coalescing, the resulting shape will either be spherical (or spherical-like) or elliptical (or elliptical-like).
This is when they're just forming and each one is "doing its own thing".
When all the matter has coalesced, there was nothing to transfer its energy to. Meaning when a ball is rolling and it hits another ball, the energy of the first ball is passed on to the other ball and it will slow down to a stop (I'm ignoring friction for now, so as not to complicate things any more than they already are!). When the matter was going down into the centre of the "bed-sheet" and developed speed in the process, there was nothing to transfer that energy to, so it developed a rotation.
Furthermore, since stars developed first (long story, but it is much easier and simpler to start with stars (1 gas: Hydrogen, as opposed to many elements), which would further fascillitate the planets' development (heat is very conducive to this process, as is the star's "bed-sheet", since it nudges the matter into moving together and coalescing and contributes to the rotation of the matter going into the centre of the planet's "bed-sheet", as well as after everything has coalesced!), the planets "leaned" towards the star's "bed-sheet", its centre. But because they had masses and "bed-sheets" of their own, they didn't entirely fall down towards the centre of the star's "bed-sheet", but rather simply went round and round the perimeter at varying frequencies (how often they completed going around the entire circumference) and varying rotational speeds (The presence of the star's "bed-sheet" increases the rotational speed, since the planet is being pulled toward the centre of the star's "bed-sheet" but is still big enough to resist. So it simply rotates faster still!), depending on how large both the star and planet were and how far they were from each other.
So now we have stars and planets and everything is moving. But there were things (comets, asteroids etc.) beyond the gravitational fields of planets and stars and so didn't coalesce into one planet per-se, but were still close enough to "lean" towards the "bed-sheet" enough to have an orbit. The consequence of this was that at some point in time there were collisions between planets on one hand and comets and asteroids on the other. A consequence of the collision, depending on the masses of the bodies in question and their velocities (speed and direction), the shape of the planet was altered, it may even have lost part of it (just as the earth's moon was formed: a collision that separated a large-enough chunk for it to have its own "bed-sheet" and resist going back down into the centre of the earth's own!) and it may even end up changing the direction of its rotation: clockwise to anti or vice versa!
I hope this doesn't come across as rambling or that you get the impression that I've been condescending. I'm just trying to cover all the bases to clarify the issue as much as possible. :) So I hope I helped. :) Good luck, take care and have a great day. :)
Cheers!
2007-02-15 06:47:04
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answer #7
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answered by Cogano 3
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