Browse Archive
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How Big Is Big? How Small Is Small? →
Compare objects as large as the solar system and as small as atoms.
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Sorting the Universe →
Put things back into correct categories.
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STS-132 Overview Video →
Watch an animation of the parts that the space shuttle will deliver.
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Planet Families →
Try to build the perfect solar system.
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Photon Pile-up →
Spin the Galex telescope to collect three photons of the same color.
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Current Astronauts Wish Buzz Aldrin Luck on "Dancing with the Stars"
› View This Video -
The Golden Record
Voyager 1 is carrying a message to anyone or anything out in space.
› View Flash →
› View HTML →
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Wrath of Ra →
Hit Earth with a solar event.
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The Whyville Spectrometer →
Test gases and solids to see their spectra.
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Journey to a Black Hole →
Drag the viewfinder to find black holes.
![Astronauts aboard the space station](javascript:watchNASAOnDemandVideos('http://anon.nasa-global.edgesuite.net/anon.nasa-global/ccvideos/buzz_dancing.asx','','','','Current Astronauts Wish Buzz Aldrin Luck on "Dancing with the Stars"','434955main_buzz_dancing_vid_100.jpg','228267','') "Astronauts aboard the space station")