Hubble Telescope in 'Safe Mode' After Gyro Failure

On Friday, NASA's iconic Hubble Space Telescope, our window into the universe since 1990, went into a protective safe mode after one of its gyroscopes failed.Hubble was built with six gyroscopes designed to keep the telescope pointed the same way for long periods of time. These six gyroscopes were replaced during a 2009 repair mission to the telescope. But, over the years, some of these gyroscopes have failed and stopped functioning properly.
The Trouble With Hubble's Gyros
Before Frid