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 Originally Posted by CoccoBill
That's all quite intuitive. What isn't however, is that wouldn't even a slight change in velocity, even the tiniest bit of acceleration or deceleration cause the planet to either get loose or crash? How come this doesn't happen? What creates this universal (ha!) tendency for all objects to just play nice and circle each other at exactly the right speed?
Dunno if this was answered, if an object speeds up it just moves into a larger orbit(this is happening to the moon as we speak). If it slows down it goes into a smaller orbit. This happens with ~meter sized objects in the asteroid belt so their is literally almost no meter sized objects in the belt. Basically as if the object rotates the same way it goes in revolution it'll be pushed out because the object is the warmest on the rear side(This works like a mini rocket). If it rotates the opposite way of it's orbit it slows down and falls toward the sun.
So basically everything is going at "exactly" the right speed because if it was going any slower/faster it would be in a different orbit where it would be exactly the right speed.
Also no one mentioned the earth formed within 100k years after the sun and the whole solar system was VERY stable after the first few 100k years maybe even sooner. That's the best guess anyway from my understanding.
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