When considering landing sites on Mars, NASA astronauts say they don’t care where they go -- just don't kill them.
For 48 minutes, every trip around the moon, Michael Collins was the most isolated man in history.
During a Friday spacewalk around the International Space Station's exterior, two NASA astronauts encountered a small ammonia leak and sustained very minor glove damage.
It's hard work to be in space for months at a time. Read about the record-holders for America's single spaceflights -- including Scott Kelly, who just recently surpassed the previous mark of 215 days.
Candidates must hold a bachelor’s degree from an accredited institution in engineering, biological science, physical science or mathematics.
After 15 years of a continuous crewed presence, here are just a few of the highs and lows of humanity's most ambitious international endeavor in space.
Though they don’t bear the burden of gravity, astronauts who run aboard the International Space Station can commiserate with participants in the New York City Marathon, though weightlessness presents them with different types of challenges.
Astronauts are known for being in peak physical condition, but everyone gets sick at one point or another.
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