[PIF]

Energy produced from fusion or solar?

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Fusion does not exist as yet, and solar is weak. Fission is a reality and small fission plants have already been designed.

And long term stay on any body, as well as getting there in realistic time frame, will require nuclear power. The squeamish and environmentally correct need to just take a hike ...

[PrairieLady2]

Take protiens and your body will do the rest. How about chia seeds?

[dhs12345]

Ya. A little pie in the sky right now. Heres hoping that fusion will be a reality sometime within the next 100 years.

What is the most plentiful element in space? Put a scoop on the front of your spaceship and use it to feed your fusion reactor. Maybe scoop up other stuff like particles flying through space blasting out from the sun. Some of the particles are charged and are probably plentiful (relatively speaking).

Interesting how optimistic predictions about space travel are — according to the 2001 Space Odyssey we should have already had a manned mission to Mars. So maybe by the time we have figured out space travel, we will have figured out the fusion thing.