Earth will get a second moon for nearly 57 days this year
When and how to see September's Harvest Moon
Mysterious 9-day seismic event triggered by 650-foot tsunami
Polaris Dawn crew set for historic spacewalk Thursday
Transister issue resolved, NASA clears way for Europa Clipper launch
Missouri patient contracts bird flu despite no known contact with animals
Researchers find evidence that large sharks may be hunting each other
FAA grounds SpaceX Falcon 9 rockets after rare crash-landing
