29 April 2011, 05:57 PM ET
There are many factors that dictate the optimal launch window, including orbital mechanics, lighting, wind and crew sleep cycles.
29 April 2011, 12:16 AM ET
Endeavour will carry six astronauts and an expensive astrophysics experiment to the International Space Station
28 April 2011, 11:41 PM ET
Lightning and stormy weather help create unforgettable images of shuttle Endeavour.
28 April 2011, 05:49 PM ET
Skywatchers in western and central Europe could catch a glimpse of Endeavour and its fuel tank flying across the twilight sky.
28 April 2011, 03:26 PM ET
On the eve of the penultimate space shuttle launch, a new wave of space exploration is surging forward.
28 April 2011, 10:39 AM ET
Here are a few interesting facts about NASA's space shuttle Endeavour, as the orbiter prepares to blast into space for the final time.
27 April 2011, 03:02 PM ET
A brush fire at NASA's Kennedy Space Center will not impact the space shuttle Endeavour's scheduled launch on Friday.
27 April 2011, 02:29 PM ET
Space shuttle Endeavour's pilot recounts how the close-knit astronauts reacted to news of Gabrielle Giffords' shooting.
27 April 2011, 12:24 PM ET
The space shuttle Endeavour is "go" for launch this Friday (April 29) for its 25th and final mission.
26 April 2011, 02:37 PM ET
The six astronauts slated to ride the space shuttle Endeavour on its last mission to space arrived in Florida today.
26 April 2011, 11:14 AM ET
There's an 80 percent chance of good weather for Friday's planned launch of the space shuttle Endeavour.
26 April 2011, 08:25 AM ET
NASA officials say they did not consider the coincidence when scheduling the launch.
22 April 2011, 09:21 PM ET
Despite persistent rumors astronauts have not yet experimented with sex in space, officials say.
20 April 2011, 03:34 PM ET
President Barack Obama and his family will attend NASA's final launch of space shuttle Endeavour on April 29.
20 April 2011, 03:12 PM ET
The STS-134 crew illustrates the mission objectives with animations of the AMS-02 install, spacewalks, iss flyaround and more.
20 April 2011, 10:47 AM ET
Obama said the White House played no part in choosing the museums where NASA's retired space shuttles will be displayed.
19 April 2011, 04:57 PM ET
Top officials at NASA voted unanimously to launch the shuttle Endeavour on its last voyage to space April 29.
19 April 2011, 11:43 AM ET
NASA mission managers are meeting to decide on a launch date for the space shuttle Endeavour's last trip to orbit.
18 April 2011, 08:13 AM ET
An animated look at the passenger and logistics module of the Skylon space plane, a concept vehicle that could be operational by 2020.
15 April 2011, 05:23 PM ET
Shuttle contractor USA will let go of thousands of employees along with the space shuttle's retirement.
15 April 2011, 11:00 AM ET
You could soon be in the co-pilot's seat as Rocketship Tours launches XCOR's Lynx on sub-orbital flights. XCOR president Jeff Greason and former Space Shuttle Commander Rick Searfoss explain what you'll see and feel.
14 April 2011, 02:53 PM ET
A bid to continue flying the orbiters as a commercial service is still in the works – even if it is considered a long shot.
13 April 2011, 06:01 PM ET
A large crowd gathered at New York's Intrepid Sea, Air & Space Museum exploded in cheers when they learned the museum would receive a retired shuttle orbiter.
13 April 2011, 05:40 PM ET
All together, the three shuttles are worth more than $15 billion dollars.
13 April 2011, 02:36 PM ET
The Tigris and Euphrates rivers were part of the first views of Earth by space shuttle astronauts.
13 April 2011, 06:00 AM ET
The era of American space planes is far from over.
12 April 2011, 01:33 PM ET
The final resting homes for NASA's shuttles Discovery, Atlantis, Endeavour and Enterprise are decided.
12 April 2011, 07:29 AM ET
As the the 30th anniversary of the first space shuttle launch nears, SPACE.com talked to the shuttle's first pilot about getting the whole thing started.
12 April 2011, 07:00 AM ET
Politics, funding, and technical challenges put a stop to any attempts to build a 'Space Shuttle 2'
12 April 2011, 06:00 AM ET
The 30th anniversary of the space shuttle and 50th anniversary of Yuri Gagarin's flight make today momentous.
12 April 2011, 12:36 AM ET
Five decades after the historic first human spaceflight on April 12, 1961, there is still much more to explore beyond our home planet Earth.
11 April 2011, 06:10 PM ET
All of the space shuttle orbiters will be sent to museums in places with historical ties to spaceflight.
11 April 2011, 03:47 PM ET
The space shuttle provides pricey but useful lessons for future spaceflight endeavors.
11 April 2011, 12:19 PM ET
The sun rises over Kennedy Space Center as space shuttle Columbia awaits the start of STS-1, the first space shuttle mission, which launched on April 12, 1981.
11 April 2011, 11:22 AM ET
SPACE.com remembers the men and women who lost their lives during spaceflight missions.
11 April 2011, 07:00 AM ET
Some museum officials will be thrilled, and many others disappointed, when the decision is announced on Tuesday.