Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
Meteor shower will be more plentiful south of the Equator, but to the north the shower will be a little harder to enjoy.
Map could help explain how the universe expands, and give new insights into dark energy.
Delays are factored into each mission's budget to prevent costs from spiraling out of control.
The sun is the center of all life and energy for Earth. Check out these incredible images of the sun taken by NASA.
May 8 is the earliest possible launch date for Endeavour's final flight.
Video: NBC space expert James Oberg discusses the next phase in U.S. space exploration after NASA retires the shuttle program in June.
Maintenance and system checks means it will be at least two days until Endeavour is cleared to launch again.
Who named the shuttle Endeavour? How much did it cost to build? How did it help put the 'international' in International Space Station?
Striking photos taken on the eve of space shuttle Endeavour's final launch show a barrage of lightning that did not damage the spacecraft.
Forecasters said there was a 70 percent chance that weather conditions would be suitable for launch.
The wife of Endeavour's commander makes her first public appearance since being shot in January.
Six old space hands fly Endeavour one last time to deliver parts and a science experiment to the International Space Station.
The launch of NASA's space shuttle Endeavour is expected to draw up an enormous crowd to Florida's Space Coast to catch what will be the fleet's next-to-last flight before the 30-year-old shuttle program retires for good.
Endeavour was named after Captain James Cook's infamous exploring ship from the 18th century.
Mark Kelly, husband of U.S. Representative Gabrielle Giffords, a Democrat recovering from a near-fatal shooting, commands the Endeavour crew.
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Science journalist blogs about humans and other wildlife.