Health Team

Technical glitch hobbles Hubble Space Telescope

Posted October 9, 2018 7:55 a.m. EDT

— NASA scientists are desperately trying to repair the Hubble Space Telescope, which is currently pointing the wrong way because of a technical fault.

The telescope, which travels the Earth at about five miles per second -- equivalent to driving from America's East to West Coast in just 10 minutes -- faces out to space to take pictures of planets, stars and galaxies to help scientists learn about the solar system.

But it has been in "safe mode" since Friday after one of the three gyroscopes used to aim and steady the telescope failed.

"Science operations with Hubble have been suspended while NASA investigates the anomaly," a statement from the space agency said.

Named after astronomer Edwin P. Hubble, the foremost American astronomer of the 20th century, the sophisticated optical observatory was placed into orbit about 600 kilometers (370 miles) above Earth by the crew of the Space Shuttle Discovery on April 25, 1990.

This is not the first time such a fault has occurred. A series of space missions were needed to repair technical problems -- affecting the gyroscopes among other things -- since Hubble's launch in 1990.

The current fault had been anticipated because the gyroscope had been "exhibiting end-of-life behavior for approximately a year," according to NASA.

Though the telescope is temporarily out of action, NASA is confident it will soon be back on track.

On Monday, NASA tweeted: "The Hubble team is working to resume science after Hubble entered safe mode due to 1 of 3 gyros failing. Analysis and testing on the backup gyro are ongoing to determine why it is not performing as expected.

A 2009 servicing mission installed six new gyroscopes, according to NASA. Ideally, Hubble would use three of them simultaneously "for maximum efficiency," but it can continue making observations with one, the agency said in another tweet.

In 2020 NASA will launch Hubble's successor, the James Webb Space Telescope, a more powerful instrument that will offer astronomers unprecedented views of the cosmos.