26 December 2013, 09:45 AM ET
NASA's retired space shuttle Endeavour takes to the streets of Los Angeles again Jan. 1, this time as the lead feature on a 125th Rose Parade float. The iconic black and white orbiter will soar from the City of Los Angeles' 2014 float.
25 December 2013, 11:32 AM ET
Six space travelers living in orbit definitely aren't home for Christmas today, but that doesn't mean they won't get into the holiday spirit on the International Space Station.
24 December 2013, 01:20 PM ET
Astronauts aboard the International Space Station have received a gift just in time for Christmas: a new pump module to repair their ailing cooling system and to restore the outpost to full power.
24 December 2013, 10:01 AM ET
NASA astronauts Rick Mastracchio and Mike Hopkins took to the outside of the International Space Station for an urgent spacewalk on Christmas Eve (Dec. 24) to fix a problem with the orbiting outpost's vital cooling system.
24 December 2013, 07:52 AM ET
They won't be home for Christmas: See how astronauts celebrate holidays in space.
24 December 2013, 06:55 AM ET
Two American astronauts are spending Christmas Eve working in the vacuum of space to hopefully fix the vital cooling system aboard the International Space Station.
24 December 2013, 06:10 AM ET
Two American astronauts will spend their Christmas Eve working in the vacuum of space as part of an emergency campaign to fix the broken cooling system aboard the International Space Station, and you can watch their spacewalk live.
23 December 2013, 05:08 PM ET
This message from NASA administrator Charles Bolden was sent to the moon and back with only a few seconds of delay. The Lunar Laser Communications Demonstration mission aboard NASA's LADEE spacecraft successfully received and retransmitted the video.
23 December 2013, 01:50 PM ET
Two astronauts on the International Space Station are set for a Christmas Eve spacewalk tomorrow (Dec. 24). NASA astronauts Rick Mastracchio and Mike Hopkins will dawn their spacesuits and float out into space for another spacewalk Tuesday.
23 December 2013, 12:12 PM ET
See stunning images taken by astronaut Rick Mastracchio aboard the International Space Station during the Expedition 38/39 mission in 2013/2014.
23 December 2013, 11:23 AM ET
An astronaut peeks inside the flight deck during his EVA on STS-49.
23 December 2013, 11:00 AM ET
See spectacular photographs taken by astronaut Mike Hopkins aboard the International Space Station during the Expedition 37/38 mission in 2013.
23 December 2013, 10:54 AM ET
A malfunctioning cooling pump was removed in the first of a multiple space walk repair mission for ISS astronauts. Astronauts Rick Mastracchio and Mike Hopkins completed Spacewalk #1 on Dec. 21, 2013.
22 December 2013, 01:17 AM ET
NASA pushed the second of three planned holiday spacewalks by 24 hours after noticing an issue with the spacesuit of Rick Mastracchio, who ventured outside the orbiting lab with fellow NASA astronaut Mike Hopkins Saturday.
21 December 2013, 12:35 PM ET
Two astronauts working speedily outside the International Space Station removed a faulty pump module ahead of schedule, potentially negating the need for a planned Christmas Day spacewalk as they work to repair the outpost’s critical cooling system.
21 December 2013, 11:00 AM ET
Astronauts will perform two or three spacewalks to repair a problem with the International Space Station's cooling system, scheduled for Dec. 21, 23 and 25, 2013.
21 December 2013, 07:14 AM ET
Two NASA astronauts have begun their first of three quickly planned spacewalks to fix a problem with the International Space Station's vital cooling system.
20 December 2013, 11:52 PM ET
From amazing photos of the Gaia galaxy-mapping spacecraft's launch to an amazing Hubble image of a celestial "Christmas wreath," don't miss these amazing space images of the week for Dec. 21, 2013.
20 December 2013, 07:00 PM ET
On Saturday (Dec. 21), two NASA astronauts will venture outside the International Space Station to perform the first of potentially three urgent spacewalks to fix the vital cooling system on the orbiting outpost. You can watch it live online.
20 December 2013, 10:24 AM ET
It is one of the most famous photos ever taken — the Earth rising over the moon's horizon as seen firsthand by the 1968 Apollo 8 crew. And yet, more than four decades later, details about how the photo was captured are still being uncovered.
20 December 2013, 10:18 AM ET
In a first for robot-human relations, Japanese astronaut Koichi Wakata chatted with the talking robot Kirobo aboard in the International Space Station on Dec. 6.
20 December 2013, 10:12 AM ET
In December 1968, the Apollo 8 crew became the first humans to experience an Earthrise from the lunar orbit. This visualization is based off of the actual photos and satellite imagery. Narrated by Andrew Chaikin, author of 'A Man on the Moon'.
19 December 2013, 03:45 PM ET
Astronauts preparing to spacewalk outside the International Space Station are outfitting their spacesuits with an unusual device: a makeshift snorkel.
Primary Section: spaceflight
19 December 2013, 02:15 PM ET
A new way to weigh the mass of distant alien worlds could help reveal key details about how friendly they may be to life, researchers say.
19 December 2013, 09:44 AM ET
An astronaut and a cosmonaut shake hands during the STS-71 mission.
19 December 2013, 07:00 AM ET
The Mars One colonization mission plans to bring live video of the surface of Mars to Earth via a privately built communications satellite and lander to launch as part of an unmanned mission in 2018.
18 December 2013, 06:50 PM ET
Repairing a problem with the International Space Station's vital cooling system will require at least two if not three spacewalks, NASA officials said today (Dec. 18). The spacewalks are scheduled for Dec. 21, 23 and 25.
18 December 2013, 06:50 PM ET
Lead U.S. Spacewalk Officer Allison Bolinger explains what the ISS astronauts will be doing over 3 spacewalks to repair cooling system. A pump module needs to be replaced.
18 December 2013, 01:24 PM ET
Had the momentum of the 1960s been maintained over the next 40 years, there would be footprints on Mars by now. But after Apollo, the political impetus for manned spaceflight was lost.
18 December 2013, 12:33 PM ET
An astronaut prepares for STS-38 by training underwater for EVAs.
17 December 2013, 07:06 PM ET
NASA has decided that three spacewalks — one each on Dec. 21, 23 and 25 — will be necessary to replace a faulty pump module on the station. As a result, the planned launch of the unmanned Cygnus spacecraft will occur in mid-January at the earliest.
17 December 2013, 10:06 AM ET
Astronaut Rick Mastracchio just might find himself spacewalking in a weightless wonderland this winter to make repairs on the International Space Station, and he says he's ready for the job.