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Second NASA Rover Lands on Mars; Spirit Prognosis Improves

NASA celebrated the successful landing of its second rover, Opportunity, Saturday night on the opposite side of Mars from its twin rover, Spirit.

NASA Rover Stops Transmitting Data From Mars

NASA's rover Spirit has failed to transmit data from Mars for more than 24 hours in what mission scientists thought at first was a weather-related interruption but now believe could be a serious hardware or software problem.

NASA Ends Service Missions to Hubble Telescope

By PBS News Hour

NASA has said it will no longer service the Hubble Space Telescope, which has been relaying spectacular images of celestial objects from its orbital vantage point for more than ten years.

Crash Probe Faults Foam, Says Safety Plan a Must

An independent board investigating the breakup of the space shuttle Columbia released its final report Tuesday morning.

E-mails Indicate NASA Worried About Columbia Crew’s Survival

NASA engineers worried a day before the Space Shuttle Columbia disintegrated upon re-entry that the shuttle's wing might burn through, leading to a breakup of the craft -- a message they did not communicate to senior NASA officials.

NASA Officials Discussed Damage Before Columbia Disaster

Days before the space shuttle Columbia disintegrated a NASA official warned that damage sustained during takeoff may have been enough to allow super-heated air to breach its left landing gear door.