An unmanned satellite carrying an infrared-sensitive telescope that will image the entire sky.

A scientific experiment that uses Internet-connected computers in the Search for Extraterrestrial Intelligence (SETI). You can participate by running a free program that downloads and analyzes radio telescope data.

News and information about meteor showers, solar flares, auroras, and near-Earth asteroids.

Space history chronicled through missions and programs that didn't happen.

A directory of ways to participate in space exploration.

Explore the universe through the eye of the Hubble Space Telescope.

SDO is the first mission to be launched for NASA's Living With a Star (LWS) Program, a program designed to understand the causes of solar variability and its impacts on Earth.

NASA's vision: To reach for new heights and reveal the unknown so that what we do and learn will benefit all humankind.