Sun System Sun
Why does it take less energy for a rocket to get out of the solar system than sun?
I was looking at answers to dumping nuclear waste into the sun and some people were saying that it would take more energy to go from the earth to the sun than it would to go from the earth out of the solar system.
It has to do with the work that gravity is doing on the vessel as it travels through space. As you travel farther from an object its force of gravity gets less and less and as you travel closer the force of gravity gets greater and greater. Thus traveling back from the Sun could very likely take more energy than travel out to the edge of the solar system.
However if you merely wanted to send vessel right into the sun with no return flight, then that would be more efficient since the center of gravity in the solar system is near the sun and thus there would be less force pulling back on it and more pulling it forward then sending it out to space.
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