Spaceflight covers topics related to human presence in outer space. Learn about weightlessness, astronauts and space tourism in this section.

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NASA and other agencies have been studying artificial gravity in hopes they will someday use it to help astronauts combat the effects of weightlessness in space. How close are we to that reality?

By David Warmflash, M.D.

In space, poop is often a problem. Maybe it will be part of the solution, thanks to a study showing waste can become protein and fat.

By Nathan Chandler

From sporting goods to movie memorabilia, members of the space program have been inventive about what they take into space. Here are 10 offbeat items that have taken the ride.

By Laurie L. Dove


GPS is great, but it's kind of Earth-centric. If we have our hearts set on traveling to distant planets and faraway stars, then it's time to come up with a new navigation system. NASA, of course, has an idea.

By William Harris