Space exploration is a broad topic covering many facets of deep-space and planetary science. Learn about space probes, Mars Rovers, SETI and other out-of-this-world subjects.

Blastoff! The Big, Bad Space Launch System Quiz

On Sept. 14, 2011, NASA announced plans for the Space Launch System (SLS), the driving force behind the American space program for the foreseeable future. How much do you know about the future of American spaceflight?

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  • How Lunar Liquid Mirror Telescopes Work

    How Lunar Liquid Mirror Telescopes Work

    NASA's next generation of telescopes will collect 1,736 times more light than the Hubble and will penetrate the depths of the universe to see objects nearly as old as the Big Bang. See more »

  • How many planets in our universe could support life?

    How many planets in our universe could support life?

    We don't know the answer to how many civilizations might exist in the universe. But we do know the factors that allow life on Earth. Are there other planets that fit the bill? Oh yes indeed. See more »

  • How Mars Odyssey Works

    How Mars Odyssey Works

    Mars Odyssey is NASA's latest Mars spacecraft, and it's going to the red planet in search of water. Learn how this orbiter could pave the way for manned missions to Mars! See more »

  • How much food and water do you need for a one-year stay on Mars?

    How much food and water do you need for a one-year stay on Mars?

    If you spent a year on Mars, you would need to take more food and water than you could possibly carry. But if you had to go, how much would be enough? See more »

  • How Planet Hunting Works

    How Planet Hunting Works

    Don't worry. We still love you, Earth, but we've been wondering about the possibility of life on other worlds for centuries, and now we have the tools to do some exploring. What have astronomers found so far? See more »

  • How Satellites Work

    How Satellites Work

    Thousands of satellites fly overhead every day, helping us with things like weather forecasts, scientific research, communications, TV broadcasts (and maybe some surreptitious spying). How much do you know about these eyes in the sky? See more »

  • How SETI Works

    How SETI Works

    SETI is the Search for Extraterrestrial Intelligence, and it's dedicated to discovering signals sent to Earth from far, far away. Find out what would happen if an extraterrestrial were to make contact. See more »

  • How Space Regulation Works

    How Space Regulation Works

    Hollywood has no problem coming up with space cops who enforce the law in the wild black yonder. In reality, space regulation is a wee bit trickier. See more »

  • How SPACECAST Works

    How SPACECAST Works

    In March 2011, European scientists announced the launch of a project called SPACECAST to detect and forecast space weather. How will it work and what do they hope to learn? See more »

  • How the Doomsday Ark Works

    How the Doomsday Ark Works

    If the Earth is struck by calamity, will survivors find salvation in the proposed Doomsday Ark? The lunar-based vault will contain information that could help jumpstart a new civilization. See more »

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