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SVTPerformance's Chain of Restaurants
Road Side Pub
What is spacetime?
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<blockquote data-quote="James Snover" data-source="post: 16605488" data-attributes="member: 67454"><p>Right, but it's a combination of the Sun's _and_ the Earth's mass, even though the sun out masses Earth by something like 330,000,000-to-1. It distorts space enough that as far as the Earth is concerned, it's moving in a straight line next to the sun. But that straight line is a full circle warped into space. Which is why the Earth doesn't experience any sort of centrifugal force (which, itself, is an illusion, but a useful one, so I'll allow it). Mass causes space to bend, and the bending in space dictates how mass moves. It's a real headache to calculate all the interacting forces in multiple bodies, but we do know this: mass always adds up. Never down. Which is why gravity has such a huge effect on the universe. All the other forces are polarized, and can be made to cancel each other out. Not gravity. Which isn't really a force, just a side effect.</p></blockquote><p></p>
[QUOTE="James Snover, post: 16605488, member: 67454"] Right, but it's a combination of the Sun's _and_ the Earth's mass, even though the sun out masses Earth by something like 330,000,000-to-1. It distorts space enough that as far as the Earth is concerned, it's moving in a straight line next to the sun. But that straight line is a full circle warped into space. Which is why the Earth doesn't experience any sort of centrifugal force (which, itself, is an illusion, but a useful one, so I'll allow it). Mass causes space to bend, and the bending in space dictates how mass moves. It's a real headache to calculate all the interacting forces in multiple bodies, but we do know this: mass always adds up. Never down. Which is why gravity has such a huge effect on the universe. All the other forces are polarized, and can be made to cancel each other out. Not gravity. Which isn't really a force, just a side effect. [/QUOTE]
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SVTPerformance's Chain of Restaurants
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What is spacetime?
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