National Aeronautics and Space Administration

After two decades of planet searching, Alan Boss has written a book about how far we have come and how close we are to answering the question of whether we are alone in the universe.

Here at Universe Today, the subject of Newtonian gravity always seems to lead to vigorous debate. Now, there’s new research to stoke it.

The Hubble Space Telescope's legendary Wide Field and Planetary Camera 2 has produced one of its last images, a gorgeous shot of a planetary nebula.

Atlantis is set to launch at 2:01 p.m. EDT on a mission to upgrade the world's most famous telescope.

Researchers have developed a new way to measure Earth’s aurora and are using the technique to learn more about a region of the ionosphere that plays a key role in satellite and radio communications during geomagnetic disturbances.

New technologies for NASA's James Webb Space Telescope can be used to enhance the Hubble's Advanced Camera for Surveys (ACS) in the upcoming servicing mission.

The Saturn probe Cassini has snapped a new set of haunting photographs of the ringed gas giant as it circles the planet from some 846,000 miles out.

Launched on August 3, 2004, NASA’s Mercury MESSENGER spacecraft has been rocketing around the inner solar system for the past few years, doing flybys of Earth, Venus, and its primary target—Mercury—as it prepares for the final phase of its mission. If all goes as planned, MESSENGER will enter Mercury orbit in March 2011, and it will spend a year observing the planet’s composition, magnetic field, geology, and exosphere.

Scientists have been studying a unique undersea volcano that appears to be continuously active and supports unique biological communities. The site, dubbed NW Rota-1, is located near the Island of Guam and is helping astrobiologist understand how life can thrive under extreme conditions in the depths of the oceans.

Some of the science explored by Spitzer will be the same and some will be entirely new.