Astronauts return to Hubble to extend the life of one of NASA's greatest observatories.
› Servicing Mission 4 PageLearn about the next mission to the International Space Station.
Kepler will monitor 100,000 stars, searching for signs of planets -- including ones as small as or smaller than Earth.
The LCROSS mission's objective is to confirm the presence or absence of water ice in a permanently shadowed crater at the moon's South Pole.
LRO will launch in late 2008 to find safe landing sites, locate potential resources and demonstrate new technology.
The Solar Dynamics Observatory, scheduled for launch in 2008, will help us understand the sun's influence on Earth by studying the solar atmosphere at multiple wavelengths.
The space shuttle is the most complex machine ever built and is helping build the International Space Station, the world's largest orbiting laboratory.
WISE will study the solar system, Milky Way and universe. Among the objects WISE will study are asteroids, the coolest and dimmest stars and the most luminous galaxies.