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'Spirit' mission marks 9 years on planet Mars

Posted By GABRIELLE LEVY, UPI.com   |   Jan. 4, 2013 at 11:15 AM   |   Comments

http://cdnph.upi.com/sv/em/i/UPI-7781357312251/2013/1/13573179844522/Spirit-mission-marks-9-years-on-planet-Mars.jpg
Jan. 4 (UPI) -- Interest in Mars exploration was revived when NASA successfully landed the Curiosity Rover in the Gale crater last year, with millions of people watching the "seven minutes of terror" descent of the rover to the surface.

But Curiosity does not roam the Red Planet entirely alone: the chatty robotic lab joined Spirit and Opportunity, twin rovers who this week celebrate their 9th anniversary exploring the Martian landscape.

Spirit and Opportunity landed on Mars in January 2004, were initially slated for a 90-sol (90 Mars days) mission but ended up lasting more than 20 times that--about six years--until it got stuck in soft soil and became unrecoverable. Opportunity continues to move and gather data.

The two rovers were instrumental in confirming the past presence of water on a planet that is now too cold and dry to sustain life.

© 2013 United Press International, Inc. All Rights Reserved. Any reproduction, republication, redistribution and/or modification of any UPI content is expressly prohibited without UPI's prior written consent.
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The Sun's magnetic field and releases of plasma directly affect Earth and the rest of the solar system. Solar wind shapes the Earth's magnetosphere and magnetic storms are illustrated here as approaching Earth. These storms, which occur frequently, can disrupt communications and navigational equipment, damage satellites, and even cause blackouts. The white lines represent the solar wind; the purple line is the bow shock line; and the blue lines surrounding the Earth represent its protective magnetosphere. The magnetic cloud of plasma can extend to 30 million miles wide by the time it reaches earth. UPI/SOHO/ESA/NASA
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