National Aeronautics and Space Administration

Goddard Space Flight Center

Sun-Earth Day 2010: Ancient Mysteries, Future Discoveries

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STEREO: The Entire Sun STEREO: Comet McNaught STEREO: Illustration STEREO: Concept STEREO: Extreme Ultraviolet STEREO: Coronagraph Plasma Rain Hovenweep National Monument Arcing Active Region Ancient Mystery: Abu Simbel Magnetic Structures August 1st Coronal Mass Ejection The view from Easter Island

NASA Fact

The largest, single, challenge for astronauts traveling to Mars will be to overcome exposure to solar storms and radiation.