Get a unique 3-D perspective on the International Space Station and NASA's next Mars rover.
The Webb Telescope may look strange, but this interactive game shows that it has much in common with tube-shaped telescopes.
Do you know how to find a trace of outer space in your home and city? This updated release is loaded with new features.
This 3-D simulation is an interactive animation of several spacewalks planned for the STS-125 mission.
View a slideshow of surprising facts about our home planet.
View NASA satellites in real time with this immersive visualization.
NASA's 3D "Science On a Sphere" film showcases some of the coldest places on Earth.
Fifty years ago America met the Mercury 7 astronauts.
After more than a million online responses, the station module formerly known as Node 3 will be called Tranquility.
Voting has concluded and the results are in. The NASA 2009 Mission Madness winner is the Superpressure Balloon!
Select astronauts, rockets and goals to see which historical mission you will launch.
› Launch It!Discovery and crew deliver the final set of solar arrays to the International Space Station.
Before astronauts could land on the moon, NASA had to prove it had a vehicle to take them there.
The year's top science discoveries, from the Earth to our solar system and beyond.
Take a 3D look at NASA's new Lunar Electric Rover
Honoring NASA's Heroes
After five years, the Mars Exploration Rovers are still studying Mars. Take a closer look at how they work.
Look back on the top exploration and discovery stories of NASA's 50th anniversary year.
Follow the construction of this home away from Earth from the first element to the current configuration.
Learn about the parts and functions of an astronaut's personal spacecraft.