31 March 2015, 11:10 AM ET
Pluto was considered a planet until 2006, when it was reclassified as a dwarf planet.
31 March 2015, 08:00 AM ET
This week the science fiction movie epic 'Interstellar' gets released on Blu-ray, with 3 hours of science-packed bonus material that will have space fans drooling.
31 March 2015, 07:21 AM ET
Countries including the United States, Russia, Japan and India combined to launch eight space missions in a five-day span last week, beginning just a few days after winter relinquished its grip on the land with the spring equinox on March 20.
30 March 2015, 04:32 PM ET
NASA's Scott Kelly — one of two people spending a year on the International Space Station — already feels like the orbiting outpost is home.
30 March 2015, 03:26 PM ET
The world's first private-sector space plane, SpaceShipOne, has landed on the ground at the National Air and Space Museum after 10 years in 'Flight.'
30 March 2015, 06:50 AM ET
Here's a quick look at the evolution of NASA's Asteroid Redirect Mission (ARM), which originally envisioned bagging up an entire space rock but will now pluck a boulder from a large asteroid.
29 March 2015, 09:51 AM ET
Two spaceflyers blasted off on the first-ever yearlong mission to the International Space Station and NASA announced its plan to haul a boulder from a near-Earth asteroid to lunar orbit. Here's a look at Space.com's top stories of the week.
28 March 2015, 01:34 PM ET
From the first (contraband) corned beef sandwich in space to astronomy's oldest known 'Nova,' don't miss these amazing space images of the week for March 29, 2015.
28 March 2015, 12:23 AM ET
Three new crewmembers just arrived at the International Space Station, and two of them won't be leaving for about one year.
27 March 2015, 01:44 PM ET
NASA's Kelly astronaut twins met up for a photo Thursday (March 26), just a day before one of them was scheduled to launch toward the International Space Station on an epic and unprecedented yearlong mission.
27 March 2015, 01:43 PM ET
Preparing to go to space for a year is no walk in the park. But with two years of training behind them, NASA astronaut Scott Kelly and cosmonaut Mikhail Kornienko did, in fact, visit a park.
27 March 2015, 12:13 PM 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, 10:37 AM ET
NASA Chief Charles Bolden the 1-year mission of astronaut Scott Kelly advances the US's space goals.
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
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.
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, 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, 08:01 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
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, 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, 08:05 AM ET
The private spaceflight company posted a photo of a SpaceX sign at Florida's Cape Canaveral Air Force Station that reads "Landing Complex 1," and also released images of a Dragon cargo vessel about to leave SpaceX headquarters on Feb. 23.
25 March 2015, 07:58 AM ET
Science experiments conducted on the International Space Station during the orbiting outpost's first yearlong mission could help open the door to deep space for NASA.
24 March 2015, 01:00 PM ET
An American astronaut is about to embark on the mother of all space missions. NASA's Scott Kelly is getting ready to fly up to the International Space Station Friday (March 27) for a yearlong mission that will test his endurance like never before.
24 March 2015, 01:00 PM ET
Neptune's moon Triton has some unique properties among the moons of the solar system, which could make it an interesting location for a space colony.
24 March 2015, 11:00 AM ET
The International Space Station now plays host to an experiment that could help scientists unlock the mysteries of Alzheimer's disease.
23 March 2015, 05:52 PM ET
Retro art by the French artist Invader has turned up on the International Space Station and European Space Agency ground installations. See photos of the Space Invaders-inspired artwork on Earth and in space.