NASA

At sunset, the sun's low position makes light travel on a longer path, scattering blue and green away from our vision.

A newly discovered asteroid with a size of a football field will zoom past Earth Mar. 9, Saturday. When And Where To Watch It Live.

A newly discovered asteroid similar to the big chunk that struck Russia two weeks ago is set to pass Earth on Tuesday morning.

Manned space exploration, basic medical research and climate-monitoring satellites could all be endangered by the sequester.

NASA is hosting a teleconference Wednesday afternoon to announce new black hole observations from its new Nuclear Spectroscopic Telescope Array, or NuSTAR, and the European Space Agency's XMM-Newton X-ray telescope.

The meteor that exploded over the Ural Mountains in central Russia Friday was the largest to hit Earth in 100 years, NASA said.

Conspiracy theories have sprouted since a meteor exploded over Russia, including claims that aliens or the U.S. military were behind it.

Scientists say the asteroid 2012 DA14 that passed close to Earth on Friday and the fireball over Russia are not connected.

With the small near-Earth asteroid flyby on Feb. 15 and the meteor that broke apart over Russia on the same day, space objects crashing into Earth is a hot topic. To protect the earth, scientists have created a hypothetical asteroid defense system using lasers.

The small near-Earth asteroid 2012 DA14 flyby Friday may be one for the record books. There are many ways to watch the historic event online.

Curiosity snapped a photo of a tiny shiny object on a Mars rock -- the latest unusual find on the rover's mission.

A very large asteroid is set to fly by Earth on Feb. 15, one day after Valentine's Day. The asteroid will not hit Earth but will pass by incredibly close and could be a record for an asteroid of this size, NASA reported.

An asteroid is about to give Earth a record-breaking close shave, as it comes closer to the planet than any asteroid has before -- even closer than many satellites.

NASA will be launching a sounding rocket above Earth and it is expected to be quite the show. The rocket will eject red smoke above Earth creating a colorful display that will be visible along the East coast. For those who won’t be in the visibility area, there is a live stream for the launch tonight.

The Iranian space agency sent a monkey 75 miles into the air, reaching suborbital flight, state-run media said Monday.

NASA’s Mars Reconnaissance Orbiter, or MRO, spacecraft has produced an amazing series of photographs showing seasonal changes on Mars that include dry ice “smoke” carving grooves into the Red Planet’s sand dunes.

This week marks the ninth anniversary of the rover Opportunity’s touchdown on a flat plain close to the Martian equator.

While the attention will be on President Barack Obama during the 2013 Inauguration, NASA has announced that it will be participating in a series of events during this weekend. NASA’s plans include an open house, Star Party, floats in the inaugural parade and participating in the National Day of Service.

Bigelow Aerospace's new Expandable Activity Module could be used in the future as a space hotel for well-heeled adventurers.

Last year was also the 36th consecutive year to register a global temperature above the 20th-century average.

A massive sun eruption has sent solar particles hurtling toward Earth. While not harmful, these particles could cause a geomagnetic storm and enhance the Northern Lights display during the week.