Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
He will command space shuttle Endeavour's final mission to the International Space Station.
Dark sand dunes around Mars' northern polar cap are shifting with the seasons, as carbon dioxide gas changes form and sparks avalanches.
While scientists are seeking a habitable planet, data collected from inhabitable planets can inform research on planet and life formation.
New NASA survey of space rocks in our solar system reveals 20 new comets, more than 33,000 new asteroids, and 134 new near-Earth space objects.
The shuttle's flight to the International Space Station on February 24 is one of the final shuttle missions for NASA.
An interview with the astronomer who discovered 70 of the first 100 Kepler alien planets.
Space technology for recycling urine could be used on Earth as clean water sources become scarce.
The debris would join other exhibits in the The National Air and Space Museum designed to explain the tragedies and the lessons learned from them.
The star unleashed two powerful solar eruptions in a spectacular double blast caught on camera by a NASA spacecraft.
Brightest star in the sky is particularly visible this week in the east southeastern sky.
NASA is holding public panels to receive input and return to 'roots as a true innovator.'
Scientists discount the idea that Betelgeuse star will be as bright as another sun, saying it will resemble the brightness of a crescent moon.
Galaxy is believed to have existed 480 million years after the Big Bang.
The photo contest requires its amateur astronomers to first find the solar sail and then submit their best images.
Astronomers say they have an image of what may be the oldest galaxy ever seen, a starry cluster that came into being when the Universe was a baby.
Activist and author blogs about politics, energy and Earth's resources.
Science journalist blogs about humans and other wildlife.