Asteroid just missed Earth on Tuesday

It came close. 2015 HD1 passed just 0.2 lunar distances away (45,600 miles or 73,400 km).

Celebrate 25 years of Hubble Space Telescope

NASA has a whole slate of cool-looking activities in celebration of the 25th anniversary of the Hubble Space Telescope, starting on Monday, April 20!

Dawn spacecraft captures Ceres’ sunlit pole

After more than a month orbiting on Ceres' dark side, Dawn has captured enough images to make this animation of the dwarf planet's north pole.

Experience 2 months of Rosetta’s comet

Spectacular images from Rosetta spacecraft of Comet 67P/Churyumov-Gerasimenko between January 31 and March 25. Many different angles. Increasing activity!

New Horizons’ first color pic of Pluto

New Horizons spacecraft is now only three months away from its historic sweep through the Pluto-Charon system in mid-July. First image in color!

Watch April 16 telecon on MESSENGER’s crash into Mercury

After more than 10 years in space, the spacecraft will collide with Mercury, ending its mission, around late April. NASA telecon scheduled for April 16 at 1 p.m. EDT (17:00 UTC).

Liftoff!

SpaceX Dragon capsule now on its way to International Space Station after Tuesday's successful liftoff via Falcon 9 rocket. Rendezvous set for Friday morning.

Explaining the great 2011 Saturn storm

A storm on Saturn began in late 2010. Six months later, it wrapped entirely around the planet. Later, it subsided. Two planetary scientists explain.

Color map suggests a once-active Ceres

Plus ... what infrared data show about the Ceres bright spots.

Mars has belts of glaciers

A thick layer of dust covers the Martian ice. Under the dust, there are glaciers made of frozen water.