How does the mass and size of a spacecraft influence the amount of energy needed for it to move through the vacuum of space?
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I’ll add a technical detail, but an important one. You don’t need energy for something to move in space, you need it to change the velocity of movement.
If something in space is going at the certain velocity, doesn’t matter if it’s double the mass or not, it will keep going at it’s speed. It’s only if you want to slow it down or accelerate it that you need energy.
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