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NASA's shuttle Discovery is fit as a fiddle for its planned launch tomorrow (Feb. 24), setting the stage for the spacecraft's final trip to the International Space Station, space agency ...

The proposed reductions fall short of the $100 billion in cuts Republicans campaigned for last fall but represent substantial hits to various programs including law enforcement, NASA, the EPA and arts funds.

NASA's next-generation rover mission to the surface of Mars needs more money – again. Nine months before the scheduled launch, the space agency says the mission has burned through its reserves and needs another $82 million to complete testing before liftoff.

A private company launched a spacecraft into orbit Wednesday in a bold demonstration test for NASA that could lead to the first commercial space station supply run next year and eventual astronaut rides.

The discovery of a strange bacteria that can use arsenic as one of its nutrients widens the scope for finding new forms of life on Earth and possibly beyond.

This composite image of the Tycho supernova remnant combines infrared and X-ray observations obtained with NASA's Spitzer and Chandra space observatories, respectively, and the Calar Alto observatory, Spain. It shows the scene more than four centuries after the brilliant star explosion witnessed by Tycho Brahe and other astronomers of that era.

Police say a lockdown and reports of a gunman at a NASA research facility in Cleveland resulted from a false alarm. NASA spokeswoman Lori Rachul says: "There was not a shooting." Lt. Don Michalosky with the Cuyahoga County Sheriff's Office says a message was misunderstood Friday morning while NASA was conducting a test of its automated emergency notification system. He says someone who received the message didn't realize it was a test.

NASA engineers are replacing fuel line seals on the space shuttle Discovery to staunch a small leak in time for the spacecraft's final blastoff on Nov. 1.

A NASA spacecraft is about to have another close look at a comet.

More than 1,200 NASA workers will be laid off Friday, despite Congress passing a $19 billion budget for the space agency two days earlier.