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Delayed two days by stormy Florida weather, the shuttle Atlantis glided to a smooth California landing Sunday, closing out a successful mission to overhaul the Hubble Space Telescope with a picture-perfect Mojave Desert touchdown.

With commander Scott Altman and pilot Gregory C. Johnson at the controls, Atlantis crossed the coast of California northwest of Los Angeles on a steep descent to Edwards Air Force Base, rattling the countryside with twin sonic booms.

Taking over manual control at an altitude of about 50,000 feet, Altman guided the shuttle through a sweeping 200-degree left-overhead turn to line up on runway 22 … Read more

Nineteen years after helping launch the Hubble Space Telescope, Charles F. Bolden Jr. has been nominated by President Obama to serve as NASA's next administrator.

Bolden, a former combat pilot and Marine Corps major general, is also a veteran space shuttle commander.

Lori Garver, a former NASA associate administrator for policy and plans and a space policy adviser to the Obama campaign, will serve as Bolden's deputy.

"These talented individuals will help put NASA on course to boldly push the boundaries of science, aeronautics, and exploration in the 21st century and ensure the long-term vibrancy of America'… Read more

Space is an interesting subject. It arguably matters most to our knowledge of life. Understanding issues affecting the universe today will help us recognize them as they impact our lives going forward. And since we simply don't have the ability to explore space the way it would be required to fully understand our history, it's the Hubble Space Telescope that we must rely on to provide that for us.

But it's not without its critics. With each new service mission (including the latest), critics have contended that Hubble simply costs too much for what we're getting. And according to one U.S. legislator, it's to the detriment of other programs.

"We have to make hard choices about whether a Hubble mission is worth it now, when moving ahead is likely to have an adverse impact on other programs, including quite possibly other programs in astronomy," Sherwood Boehlert, a former Republican congressman from New York, said in 2005.

Hubble's cost is certainly high. According to NASA, the telescope has cost the United States $9.6 billion since its launch in 1990. In that time, critics remind us that scientists still haven't determined the real age of the universe; they still don't know, for sure, how the galaxy was formed, and they wonder if all those pictures Hubble sends back are really all that important.

Yes, they are.… Read more

The three-man crew of the International Space Station explored a strange new world Wednesday, boldly going where no other astronauts have gone before: toasting each other with sips of recycled sweat and urine in a major milestone for the lab complex.

With dozens of flight controllers and engineers joining them in a space-to-ground videoconference, station commander Gennady Padalka, flight engineer Michael Barratt, and Japanese astronaut Koichi Wakata held a brief toasting ceremony, touching drink bags, and sipping recycled water for the first time since laboratory analysis confirmed its purity and cleanliness.

"We're just really, really happy for this … Read more

The repaired Hubble Space Telescope was relaunched Tuesday from the shuttle Atlantis after a historic fifth and final in-orbit overhaul.

Astronaut Megan McArthur, operating the shuttle's 50-foot-long robot arm, released the 24,500-pound observatory at 8:57 a.m. EDT as the shuttle sailed 350 miles above the west coast of Africa. The repaired telescope now boasts two new instruments, new gyros, fresh batteries, a new science computer, a refurbished star sensor, and two instruments brought back to life by spacewalking astronauts.

"The release of the Hubble Space Telescope confirmed," mission control commentator Kyle Herring said. "… Read more

Astronomer-astronaut John Grunsfeld, veteran of eight Hubble Space Telescope spacewalks and a self-described "Hubble hugger," inadvertently bumped into one of the observatory's two low-gain antennas toward the end of an otherwise smooth spacewalk Monday, knocking off a small end piece. Groaning with disbelief, Grunsfeld said, "Oh, I feel terrible."

But engineers at the Goddard Space Flight Center quickly reported the antenna was still working normally. Grunsfeld and fellow spacewalker Andrew Feustel were asked to put a protective cover over the cone-shaped device for added insulation before ending the Atlantis crew's fifth and final spacewalk.… Read more

Held up by a stripped screw, spacewalker Michael Massimino applied brute force to an otherwise delicate operation Sunday, breaking off an offending handrail inside the Hubble Space Telescope and then carefully unscrewing more than 100 small fasteners to get inside a dead science instrument.

After pulling out a blown power supply circuit board, Massimino and crewmate Michael "Bueno" Good carefully installed a replacement card, closed the instrument up and began collecting tools and equipment while engineers at the Goddard Space Flight Center sent commands to verify electrical connectivity in a quick-look "aliveness" test.

Somewhere along the … Read more

In what amounted to electronic brain surgery, a space-suited astronaut cut through shielding on a broken camera deep inside the Hubble Space Telescope on Saturday, removed a cover plate that wasn't designed to be taken off in orbit, used a custom tool to pull out four blown circuit boards, and then installed a fresh set.

Running up to an hour ahead of schedule at one point, astronomer-astronaut John Grunsfeld, a self-described "Hubble hugger" making his third visit to the telescope, then spliced in an electrical cable and connected it to a new low-voltage power supply that replaced … Read more

Astronaut Michael Massimino, floating inside the Hubble Space Telescope, and fellow spacewalker Michael "Bueno" Good, on the end of the shuttle Atlantis' robot arm, successfully installed four state-of-the-art gyroscopes Friday. But an alignment problem prevented the astronauts from installing a box containing two final gyros.

Even so, Hubble Program Manager Preston Burch said the refurbished two-gyro rate sensor unit, or RSU, that they installed instead featured two of the three improvements incorporated in newer models and that engineers are confident it will prove as reliable as its partners.

"We've run the reliability models for all the … Read more