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27 March 2015, 08:13 AM ET
NASA astronaut Scott Kelly and Russian cosmonaut Mikhail Kornienko are scheduled to begin their unprecedented one-year mission to the International Space Station on Friday (March 27).
27 March 2015, 08:01 AM ET
An astronaut "smart shirt" -- one that could someday beam biometric information back to ground controllers to keep an eye on the spacefarer's health – is now on a space mission of sorts.
27 March 2015, 08:00 AM ET
Watch live Friday (March 27) as a crew of three launches to the International Space Station. Two of the crewmembers will spend one year on the orbiting outpost.
27 March 2015, 08:00 AM ET
Despite a forward-looking and overall healthy NASA planetary science program budget, two on-duty spacecraft are now on the chopping block.
27 March 2015, 08:00 AM ET
NASA's newest Mars probe recently made a risky dive into the Red Planet's upper atmosphere to learn more about how the planet's climate changed over time.
27 March 2015, 08:00 AM ET
A three-person crew will blast off to the International Space Station today (March 27), and two of them won't be coming back to Earth for a full year. You can watch live online as the yearlong mission begins.
27 March 2015, 08:00 AM ET
Astronauts today typically spend 6 months in orbit, and a yearlong mission is underway, but Mars missions would take years.
27 March 2015, 03:28 AM ET
For moon shots, a rural sky is not always necessary.
27 March 2015, 03:14 AM ET
How super is a supermoon? Here's a minimoon for context.
26 March 2015, 11:58 PM ET
The two-year mission of the one-ton rover is to find out if Mars is, or was, capable of supporting life.
26 March 2015, 06:00 PM ET
The first spacecraft to make a soft-landing on a comet is still quiet on the dusty cosmic body, despite being hailed by another probe orbiting the lander.
26 March 2015, 05:54 PM ET
An American astronaut and Russian cosmonaut are set to make history as the first crewmembers to spend a year onboard the International Space Station, but the two are not the first to log 12 months off the planet.
26 March 2015, 04:17 PM ET
NASA and Russia are launching a joint one year mission to the International Space Station. NASA's Scott Kelly and cosmonaut Mikhail Kornienko will blast off to the orbiting outpost on March 27, 2015 EDT.
26 March 2015, 02:36 PM ET
Roscosmos' Mikhail Kornienko will spend a year aboard the International Space Station. He talks about his father, a Russian military helicopter pilot that was part of search and rescue teams for the country's first cosmonauts.
26 March 2015, 02:02 PM ET
Dark matter living in galaxy clusters doesn't splatter when the galaxies collide, according to new research. The finding suggests dark matter particles, whatever they are, are not part of a "dark sector" that mirrors our own universe.
26 March 2015, 02:00 PM ET
A small cloud of rocket fuel glowed faintly in the night sky above the Atlantic Ocean on the night of March 12, following a launch from Cape Canaveral Air Force Station, Florida. Skywatcher Scott Gauer photographed the glowing cloud from Danville, Penn.
26 March 2015, 02:00 PM ET
The iron heart of Earth's moon has been measured more precisely than ever before. In a new study, scientists used X-rays to study the type of iron likely presence in our lunar companion's core.
26 March 2015, 01:50 PM ET
The next major stargazing webcast will be on April 4, 2015 during the first of two total lunar eclipses. Viewing information will be posted here once it becomes available.
26 March 2015, 10:11 AM ET
A NASA spacecraft is expected make its historic arrival in orbit around the dwarf planet Ceres, marking the first time a human-made probe has visited the cosmic body in history.
26 March 2015, 09:36 AM ET
The Asteroid Redirect Mission (ARM) will employ two vehicles. A robot will capture a boulder from an asteroid and a manned Orion spacecraft mission will rendezvous with it to return samples.
26 March 2015, 08:47 AM ET
Known to many as "G2," the unidentified object making a loop around the monster black hole at the center of our galaxy could be a cloud of gas, or it could be a star, depending on who you ask.
26 March 2015, 08:01 AM ET
NASA has a lot of questions about what happens to people who live in space for long periods of time, and it's almost time to get some answers.
26 March 2015, 08:00 AM ET
An astronaut and a cosmonaut spend an entire year aboard the ISS to provide data on the health implications of space travel.
26 March 2015, 07:00 AM ET
NASA intends to pluck a boulder off a near-Earth asteroid and haul it into orbit around the moon. Agency officials haven't decided upon the target asteroid yet, but the leading contender at the moment is the 1,300-foot-wide 2008 EV5.
26 March 2015, 07:00 AM ET
The National Space Biomedical Research Institute Industry Forum has funded three companies as part of its "Vision for Mars" challenge, which seeks to mitigate the visual problems astronauts experience during long-term spaceflight.
25 March 2015, 06:23 PM ET
Have you ever wondered what it would be like to live on the moon? What about Mars, or Venus or Mercury? We sure have and that's why we decided to find out what it might be like to live on other worlds in our solar system, from Mercury to Pluto and beyond
25 March 2015, 06:08 PM ET
Beginning skywatchers often think that the best time to look at the moon is when it is full, but experienced observers know that the moon is at its best for observing when it is around its first-quarter phase.
25 March 2015, 04:37 PM ET
NASA will pluck a boulder off a large asteroid and return it to lunar orbit, rather than target an entire near-Earth object for relocation, agency officials announced today (March 25).
25 March 2015, 04:22 PM ET
Scott Kelly's name tags were intended to be on the space station by now. The two blue and gold badges were among the items that NASA had arranged to send to the orbiting outpost ahead of Kelly launching on a yearlong expedition.
25 March 2015, 03:47 PM ET
Human bodies change on long-duration missions. NASA's Scott Kelly and Roscomos' Mikhail Kornienko will spend a year aboard the ISS to understand how to better keep future crews healthy.
25 March 2015, 02:50 PM ET
The search for alien life doesn’t end within the boundaries of our solar system. Scientists are now search for moons orbiting alien planets that might play host to extraterrestrial life.
25 March 2015, 02:50 PM ET
A recent episode of a fantastic video series called "Shelf Life," produced by the American Museum of Natural history, explores how an archive of astronomical images can help astrophysicists look back in time.
25 March 2015, 02:50 PM ET
The GPS IIF-9 satellite blasted off atop a United Launch Alliance Delta IV rocket from Florida's Cape Canaveral Air Force Station Wednesday (March 25) at 2:36 p.m. EDT (1836 GMT).
25 March 2015, 02:21 PM ET
What astronomers thought was a cloud of gas being stretched as it whipped past our galaxy's central black hole now turns out to look much more like a young, hot compact star.
25 March 2015, 02:02 PM ET
The 15-minute uncertainty of how fast Saturn spins may have been put to rest, using mathematics.
25 March 2015, 02:01 PM ET
Giant winds from black holes can blast gas through galaxies at extraordinary speeds, pulling the plug on star formation, researchers say.