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Arches National Park Geology Tour provides an extensive, visually rich description of the geology of Arches, by Deborah Ragland, Ph.D. See our DVD collection.

What will happen when on the MER missions?

Both Mars Exploration Rovers (MER) were launched from Florida in the summer of 2003. The first, Spirit, blasted off on June 10. The second, Opportunity, blasted off on July 7. Each spacecraft spent about six months in space on the way to Mars.

Spirit and Opportunity made it safely to Mars in January 2004. Spirit landed in Gusev Crater on January 3, 2004. Opportunity landed on Meridiani Planum on January 24, 2004.

The spacecraft were going very fast, about 19,000 km per hour (12,000 mph), when they got to Mars! They slowed down very quickly when they went into the atmosphere of Mars. Their heat shields kept them from burning up. They had parachutes that slowed them down some more. They also had airbags around them to make their landings softer. They bounced more than 20 times when they landed!

After they stopped bouncing they let the air out of their airbags. Then they unfolded themselves. Each rover spread out its solar panels and unfolded its wheels. Engineers on Earth tested each rover to make sure they were OK. Then the rovers drove onto the surface of Mars. We think the rovers can last about 90 days on Mars. They are exploring during the daytime and "resting" at night. After a while the solar panels will stop making enough electricity to keep the rovers going. We hope to learn a lot from them before that happens!

Last modified February 7, 2004 by Randy Russell.

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF