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SVTPerformance's Chain of Restaurants
Road Side Pub
Parker Solar Probe
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<blockquote data-quote="James Snover" data-source="post: 16621198" data-attributes="member: 67454"><p>Ok, if what you said was correct, then: gravitational assist trajectories to pick up speed in spacecraft would not work. They do work, and are used often. It's the least expensive way to gain speed we know of without burning fuel. It takes a bunch of time and planning to implement them. If they didn't work, no one would even try it. Also: if you were right, comets and meteors wouldn't work. Every time one goes blasting by the sun it picks up a speed boost and is flung back out into it's typically wildly elliptic orbit.</p><p></p><p>You're right on the the other points of mass and frame dragging. And black hole jet creation.</p><p></p><p>However: the more massive something is, and the smaller it is, the harder it is to actually hit it rather than pick up an unintentional gravity assist and be flung away from it. Our sun, twice as large as the average star, is still pretty small. Yes, stuff hits it every day, but only because there is a solar system worth of debris out there flying around. Most of it has to orbit for millions, if not billions of years, before it hits the right trajectory to hit the sun.</p></blockquote><p></p>
[QUOTE="James Snover, post: 16621198, member: 67454"] Ok, if what you said was correct, then: gravitational assist trajectories to pick up speed in spacecraft would not work. They do work, and are used often. It's the least expensive way to gain speed we know of without burning fuel. It takes a bunch of time and planning to implement them. If they didn't work, no one would even try it. Also: if you were right, comets and meteors wouldn't work. Every time one goes blasting by the sun it picks up a speed boost and is flung back out into it's typically wildly elliptic orbit. You're right on the the other points of mass and frame dragging. And black hole jet creation. However: the more massive something is, and the smaller it is, the harder it is to actually hit it rather than pick up an unintentional gravity assist and be flung away from it. Our sun, twice as large as the average star, is still pretty small. Yes, stuff hits it every day, but only because there is a solar system worth of debris out there flying around. Most of it has to orbit for millions, if not billions of years, before it hits the right trajectory to hit the sun. [/QUOTE]
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