NASA's forecast for Earth: Mostly cloudy

Why NASA can't examine Martian water

What makes galaxies shine

There's water on Mars, NASA confirms

Student invents ion thruster that breaks NASA's fuel efficiency record

NASA: Manned mission to Mars very close

New Horizons gets eyeful of Pluto's icy mountains

International space station makes spectacular solar transit

Living like sardines in the name of science

Why 'The Martian' is NASA's best marketing event in years

Committed to staying aboard the ISS for a year, astronaut turns to Earth Art

See the dark side of the moon move across Earth

Freaks of Nature

Stories You Won't Believe