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By Eric Hand of Nature Magazine On 4 January, John Grunsfeld, the fix-it-man for the Hubble Space Telescope, became the head of NASA's Science Mission Directorate. [More]

A false color image of Cassiopeia A using observations from both the Hubble and Spitzer telescopes, and Chandra X-ray Observatory. Credit: NASA/JPL-Caltech They may come from completely different fields of study, but brain scans and supernovae have more in common than you would think. [More]

By Eric Hand of Nature magazine John Grunsfeld, an astrophysicist and astronaut who fixed the Hubble Space Telescope, has been chosen to lead NASA's science mission directorate, according to several sources with knowledge of the selection.

Testing mirror segments for JWST.

Now that Atlantis has safely returned to Earth and the 30-year space shuttle program has drawn to a close, it's time to look back at the reign of Discovery, Atlantis, Endeavour and the tragically shortened careers of Challenger and Columbia . Since 1981 NASA has launched 135 shuttle missions, reaching destinations such as the Mir space station, the Hubble Space Telescope and the International Space Station. [More]

Hubble is amazing, but its replacement, the James Webb, is having problems. That makes a scientific telescope ride aboard a commercial space plane all the more compelling an idea.

As NASA prepares to wrap up its shuttle program , leaving open questions about what comes next for U.S. human spaceflight, the next big thing in NASA's astronomy program has been dealt a blow

I have always been startled and fascinated by the sandlike abundance of galaxies sprinkled across the night sky. The most sensitive optical image ever made by human beings, the Hubble Ultra Deep Field, captures some 10,000 galaxies in an area about 1/100th the size of the full moon

KENNEDY SPACE CENTER--If I'd jumped, I could have touched the belly of the Discovery. Of course, I would have then been escorted unceremoniously from the Orbiter Processing Facility. But I was that close.