Hubble telescope
It lives! Hubble Space Telescope reawakens after breakdown
The Hubble Space Telescope captured by an STS-125 crew member aboard the shuttle Atlantis.
The Hubble Space Telescope is back from the dead more than three tense weeks after it suffered an operational breakdown while carrying out its mission to study and record the distant stars and galaxies of the universe.

This weekend, NASA excitedly announced that Hubble returned to normal operations on Friday, and completed its first scientific observations since October 5 on Saturday.

Hubble, a joint NASA and European Space Agency project, had been out of action since its gyroscope failed. The gyro is a device that measures the speed at which the spacecraft is turning and is crucial in helping Hubble to turn and lock on to new targets.

Although the powerful telescope's human operators successfully activated a backup gyro the next day, that device returned incorrect rotation rates.

Last week, the team commanded Hubble to perform various maneuvers and adjusted the gyro's operational modes to clear what they believe was a blockage between components in the device.

After a series of key tests to confirm that the gyro was stable, the team installed additional safeguards in case the excessive rotation rates return, "although this is not anticipated," according to NASA.

spiral galaxy
© ESA/Hubble & NASA
An image of the spiral galaxy NGC 5033, located about 40 million light-years away, captured by Hubble Space Telescope.
Hubble, originally intended to work for just 15 years, is now once again fully functional more than 28 years after its launch. The craft has been at the forefront of space exploration, and the team expect it will continue to unearth fascinating discoveries for the next decade at least.

It's been a good month for NASA's repair team as engineers also got the Chandra X-Ray Observatory back online after fixing a similar, but less severe, backup gyroscope issue on that spacecraft. Chandra is back up working again and scanning the skies.