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


How Space Junk Works

Humans produce plenty of trash on Earth, but you might be surprised to learn how much we've managed to leave in space. What's floating around up there? And will it come crashing down on our heads?

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  • How Spacewalks Work
    How Spacewalks Work

    When astronauts talk moonwalking, they don't mean the Michael Jackson dance move. Spacewalks take an entire day of preparation -- and a 240-pound space suit. See more »

  • How Sputnik Worked
    How Sputnik Worked

    A small aluminum ball that orbited the planet for three months in the 1950s had a profound influence over your life. If it hadn't, you wouldn't be reading this now. See more »

  • How the Google Lunar X Prize Works
    How the Google Lunar X Prize Works

    Internet search giant Google is known for innovation. But now it's sponsoring the Lunar X Prize, in which private teams compete to land on the moon. Why? See more »

  • How the NASA Space Food Research Lab Works
    How the NASA Space Food Research Lab Works

    In the 1960s, space food was either cubed or tubed, and it wasn't very appetizing. Today's astronauts have a more palatable array from which to choose. Where is it developed? See more »

  • How the Space Race Worked
    How the Space Race Worked

    The space race between the United States and the former Soviet Union began in the early 1950s. What followed was an era of cooperation between the United States, and now Russian, space programs with the building and operation of the International Space Station. See more »

  • How Virgin Galactic Works
    How Virgin Galactic Works

    The not-so-distant future, regular people will be able to take flights into space. So how do you score a spot on a Virgin Galactic flight? See more »

  • How Weightlessness Works
    How Weightlessness Works

    As the International Space Station astronauts return to Earth after a three-month stay, learn about the effects of weightlessness on the body. See more »

  • How will Blue Origin work?
    How will Blue Origin work?

    Jeff Bezos made his fortune selling books online. So the next obvious step was to build rockets. Right? How does Blue Origin, Bezos' space travel company, stand up to the other commercial space racers? See more »

  • How Zero-gravity Flights Work
    How Zero-gravity Flights Work

    Almost everyone dreams of floating effortlessly like astronauts in space. The Zero Gravity Corporation offers this experience to the public. Go inside G-FORCE-ONE to find out what it's like to somersault in zero gravity and how simulating weightlessness works. See more »

  • Is space tourism safe?
    Is space tourism safe?

    If you had the money, would you pay $200,000 to launch into space? For at least one couple, the answer is yes. But is a space tour safe for the average citizen? See more »

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