NASA

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.

A team of amateur astronomers has made a fascinating discovery, uncovering evidence of 42 alien planets, one of which is roughly the size of Jupiter and could potentially be habitable by humans.

A Netherlands-based nonprofit organization is seeking volunteers for a possible mission to Mars. Mars One has released its requirements for astronauts, and those who want "to boldly go where no one has gone before” can sign up.

“Doomsday asteroid” Apophis flew by the Earth on Wednesday, and while there was no chance of the giant asteroid hitting our planet then, for some time, scientists have been worried that the asteroid could hit Earth when it swings by again in 2029 and 2036. Now, after Wednesday’s close encounter, scientists at NASA have ruled out any significant chance of an impact by Asteroid Apophis.

NASA has released a brilliant photo of the aftermath of a massive star explosion. The supernova remnant, Cassiopeia A, is 11,000 light-years from Earth.

NASA has announced the discovery of 461 new planets. Of the 461 new planets found, four could potentially hold liquid water. For some NASA scientists, finding a planet much like Earth is just a matter of time.

Months after landing on the red planet, NASA’s Mars rover Curiosity is still creating buzz with its latest findings. The most recent Curiosity news to captivate the Internet is a photo of a small rock formation that closely resembles a flower.

While many eyes were turned to the giant ball in New York's Times Square as the countdown clock hit zero and 2012 became 2013, the Sun was putting on its own New Year’s Eve celebration -- and NASA captured the stunning eruption on video.

Stargazers next fall may find the moon is not the brightest object in the night sky. As the newly discovered Comet ISON passes close to the sun between October and December next year, it indeed might become bright enough to outshine the moon.

A new study found that an asteroid known as 2011 AG5 will not hit the earth in 2040.

After the Mayan apocalypse prophecy, NASA explains why the world didn't end on Dec. 21, 2012.

NASA has announced a new prototype spacesuit that promises to completely overhaul the way astronauts conduct spaceflights.

NASA's “Ask an Astrobiologist” feature has been dominated by queries about planet-wide blackouts and mysterious rogue planets in recent weeks.