A stroll through the cosmos
What makes NASA's space explorers tick? Find out in the Astronaut Flight Lounge
First Lady Laura Bush and NASA Administrator Mike Griffin watch the launch of Discovery.
Meet the STS-114 crew and explore the Shuttle System.
A new Vision. Twin rovers on Mars. A close encounter with Saturn. The next generation of astronauts. It all happened in 2004
Explorers of Denali
Welcome to NASA.gov
NASA's Shuttle Radar Topography Mission returned from its 11-day shuttle flight with a better map of the world.› View Flash Feature
How much do you know about space travel and the search for extraterrestrial life?› Take the Quiz
An interactive feature of the Expedition 10 crew.
View some of the breathtaking images of the ringed world of Saturn and its moons from the early stages of this exciting mission.
Celebrating the past with a vision for the future.
Meet the 11 new candidates.
The Soyuz TMA-4 vehicle blasts off from the Baikonur Cosmodrome in Kazakhstan April 19, 2004.
Take them out for a spin.
An interactive tribute to the fallen heroes of Columbia
M2K4 is a NASA interactive experience focusing on the latest mission to Mars.
Explore the surface of Mars by dragging your mouse.