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.
Endeavour and crew deliver equipment to the International Space Station.
NASA celebrates 50 years of innovation and discovery.
Explore virtual pavilions, clickable models and exhibits with your robot guide Automa.
Get a sneak peak at artwork celebrating NASA's half century of exploration.
Look at changes in global conditions over time.
Sally Ride became the first American woman in space on June 18, 1983.
See how astronauts' "personal spacecraft" have changed from Mercury to Shuttle and into the future.
NASA tests future technology for living and working on the surface of the moon.
Discovery and crew deliver the main segment of Japan's Kibo module to the International Space Station.
Explore our interactive model to learn about the tools Phoenix will use to study the northern plains of Mars.
Follow Phoenix in its harrowing and challenging final descent to the Martian surface.
Check out archival videos, share your thoughts, visit a virtual mission control and try your hand at docking an Apollo spacecraft or landing on the moon.
Alan Shepard rode his Freedom 7 capsule into history on May 5, 1961.
As humanity ventures farther into the solar system, the focus on our home planet is as sharp as ever.
NASA Deputy Administrator Shana Dale and other officials visit an archaeological site in Guatemala.