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The Exploratorium's Guide to Astronomy Resources. Build
a Solar System- |
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 On October 15, 1997, the Cassini-Huygens spacecraft, loaded with an array of powerful instruments, rocketed into space on a seven-year journey to Saturn and its vicinity... |
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 On June 8, 2004, astronomers in many parts of the world watched as Venus moved across the disk of the Sun, one of the rarest planetary alignments. |
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 Spirit and Opportunity, the Mars Exploration Rovers, successfully landed on Mars! See photos and video direct from the red planet. |
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 The eleven year solar cycle reached its maximum in 2000. See images of the sun, follow solar max news, and keep up with NASA missions. |
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 On June 21, 2001 we will experience the first total solar eclipse of the new millennium! Join us as we present a live Webcast from Southern Africa! Stories on the science, human history, and natural wonder of solar eclipses. |
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 See the tiny disk of Mercury slowly travel across the face of the sun in this rare event. |
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 Dark spots, some as large as 50,000 miles in diameter, move across the surface of the sun, contracting and expanding as they go. |
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 Far north in the night sky, a faint glow appears on the horizon. Green and red flames of light stretch across the sky. |
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