This image from April 27 shows a series of tornadoes forming over Alabama and Mississippi. Captured from a satellite orbiting located at a fixed location above Earth, images like these help track trends in weather patterns. Another set of polar-orbiting satellites are useful for long-term forecast predictions. NASA Earth Observatory hide caption

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Blind Eye In The Sky: Weather Satellites Lose Funding

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Voyager 1 Probing Solar System's Distant Edge

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In A Flash Of Gamma-Rays A Star Is Gone

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Researchers Trap Antimatter For Record 16 Minutes

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Mars Mission May Be In Jeopardy

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NASA engineer Ernie Wright looks on as the first six primary mirror segments for the James Webb Space Telescope are prepped to begin final cryogenic testing at NASA's Marshall Space Flight Center. The telescope will have 18 primary mirror segments. David Higginbotham/NASA hide caption

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Scientists Undeterred By Hubble Successor's Costs

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Probing The Sun's Spots

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Charting the Local Universe

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An artist's depiction of NASA's Spirit rover on the surface of Mars. Spirit became unresponsive in March 2010. NASA announced it had ended attempts to communicate with the rover on May 24, 2011. NASA hide caption

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NASA Says A Final Goodbye To Plucky Mars Rover

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Framed in the doors of the Kennedy Center's Vehicle Assembly Building, the crawler begins the long journey toward Launch Pad 37B with space shuttle Discovery in April 2005. This enormous cross between a tank and a cargo ship is the largest self-powered land vehicle in the world. NASA hide caption

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Who Will Shuttle The Last Shuttle? The Crawler Crew

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A satellite image shows a field of what may be buried pyramid sites in Egypt. Courtesy of DigitalGlobe Images hide caption

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Possible Pyramids Discovered From Space

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President Kennedy's "Moon Speech" Turns 50

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The Moon May Be Wetter Than We Thought

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