Is solar energy the only source of energy in space?

Replies

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  Nayan Goenka

  Solar energy is something will never wear out. If we exit our solar system, we would be closer to other stars, that will give energy. Nuclear power is already under development. I dont remember where but i read about it. We also have sound and EM radiations. We can have surface harvesting of radiations for energy. So maybe sun is not directly throwing light on u, its warm out there
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  zaveri

  Besides the sun , there will surely be some other heavenly body in some other galaxy, which may serve as a source of energy in the form of radiations or so.
  
  after all there are millions of planets, and heavenly bodies in the universe, and none of us have the complete knowledge about them.
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  Kaustubh Katdare

  You can't be very reliable on other 'Suns' in the space because the distances are in lightyears! Maybe someone can tell us what are the energy requirements of a typical space explorer when it's freely moving.
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  Ramani Aswath

  The problem is not when the ship is in free fall. A small nuclear power plant could supply the on board energy needs. It is the propulsion energy for interstellar travel that is the problem. We have to remember that space is mostly vacuum with stars few and far between. Radiant energy is not an interstellar propulsion option. I am afraid that it has to be nuclear.