Skip to main content

Hubble Telescope functioning again after activation of backup gyro

The Hubble Space Telescope has been responsible for some of the most stunning and informative pictures of deep space since it was launched in 1990, but the telescope suffered a failure on October 5 that placed it into safe mode. Now NASA has announced that the telescope has been fixed and will return to normal operations.

The failure occurred due to a problem with one of the six gyros which measure the speed at which the spacecraft turns. The Hubble instruments had to be deactivated when the third gyro malfunctioned, which caused the telescope to have problems with turning to new directions and locking on to new targets. Fortunately, there was a backup gyro onboard the spacecraft which the NASA team was able to activate remotely. Although the backup gyro was activated the day after the failure, there were issues with the data that it was sending, as it suggested that the craft was rotating far faster than it actually was.

Recommended Videos

It took three weeks to rectify the problem with the backup gyro, during which time the NASA scientists commanded the craft to perform various turns and maneuvers, and switched the gyro between different operational modes. The scientists believe that this fixed the problem by clearing a blockage between parts inside the gyro which was causing the inaccurate readings. With the gyro operating effectively, NASA then performed more tests to ensure that the gyro was stable and installed additional safeguards should the problem arise again in the future. The gyro was recalibrated by setting the telescope to rotate to point at various locations in the sky and by instructing it to lock on to targets, all of which were performed effectively.

The last stage of fixing the telescope was reactivating the instruments which had been powered down, and checking that it was sending back data correctly. All went well, and the telescope started transmitting data back to Earth for the first time since the problem arose on October 5.

Now the gyro is running correctly and the instruments have been reactivated, so Hubble can resume its data collection, capturing beautiful images of space objects.

Georgina Torbet
Georgina has been the space writer at Digital Trends space writer for six years, covering human space exploration, planetary…
Hubble finds mysterious and elusive black hole
An international team of astronomers has used more than 500 images from the NASA/ESA Hubble Space Telescope spanning two decades to detect seven fast-moving stars in the innermost region of Omega Centauri, the largest and brightest globular cluster in the sky. These stars provide compelling new evidence for the presence of an intermediate-mass black hole.

An international team of astronomers has used more than 500 images from the NASA/European Space Agency (ESA) Hubble Space Telescope spanning two decades to detect seven fast-moving stars in the innermost region of Omega Centauri, the largest and brightest globular cluster in the sky. These stars provide compelling new evidence of the presence of an intermediate-mass black hole. ESA/Hubble & NASA, M. Häberle (MPIA)

There's something strange about black holes. Astronomers often find small black holes, which are between five times and 100 times the mass of the sun. And they often find huge supermassive black holes, which are hundreds of thousands of times the mass of the sun or even larger. But they almost never find black holes in between those two sizes.

Read more
See a stunning 3D visualization of astronomy’s most beautiful object
This image is a mosaic of visible-light and infrared-light views of the same frame from the Pillars of Creation visualization. The three-dimensional model of the pillars created for the visualization sequence is alternately shown in the Hubble Space Telescope version (visible light) and the Webb Space Telescope version (infrared light).

This image is a mosaic of visible-light and infrared-light views of the same frame from the Pillars of Creation visualization. The three-dimensional model of the pillars created for the visualization sequence is alternately shown in the Hubble Space Telescope version (visible light) and the Webb Space Telescope version (infrared light). Greg Bacon (STScI), Ralf Crawford (STScI), Joseph DePasquale (STScI), Leah Hustak (STScI), Christian Nieves (STScI), Joseph Olmsted (STScI), Alyssa Pagan (STScI), Frank Summers (STScI), NASA's Universe of Learning

The Pillars of Creation are perhaps the most famous object in all of astronomy. Part of the Eagle Nebula, this vista was first captured by the Hubble Space Telescope in 1995, and has captivated the public ever since with its dramatic rising pillars of dust and gas that stretch several light-years high. The nebula has been imaged often since then, including again by Hubble in 2014 and more recently by the James Webb Space Telescope in 2022.

Read more
Hubble takes first image since switching to new pointing mode
This NASA Hubble Space Telescope features the galaxy NGC 1546.

This NASA Hubble Space Telescope captured an image of the galaxy NGC 1546. NASA, ESA, STScI, David Thilker (JHU)

The Hubble Space Telescope has been through some troubles of late, and the way that it operates had to be changed recently to compensate for some degraded hardware. The telescope's three gyros, which help it to switch between different targets in the sky, have been experiencing issues, with one in particular frequently failing over recent months. NASA made the decision recently to change the way that Hubble points, and it now uses just one gyro at a time instead of all three in order to preserve the two remaining gyros for as long as possible.

Read more