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Why did two NASA space telescopes disconnected in a week?

1. Two NASA space telescopes go offline : 

 In completely unrelated events, two NASA space telescopes, the Hubble Space Observatory and the Chandra X-ray Observatory, were disconnected in a week.  The Hubble went into safe mode when the third of its six gyroscopes experienced a mechanical failure and a backup was not activated. Kepler, another space telescope, has been in safe mode since September. The Washington Posthas the details. Chandra also experienced a gyroscope failure and closed his eyes with X-rays. Read the full story on Extreme Tech.

  2. A big scare for the astronauts of the ISS :

A Russian Soyuz rocket failed when it launched US astronaut Nick Hague and Russian cosmonaut Alexey Ovchinin toward the International Space Station on Thursday. Instead of leaving the atmosphere safely, for the first time in 20 years, a manned rocket failed and catapulted its passengers to earth. The duo experienced a whopping 9G in their violent reentry through layers of atmosphere, and landed safely in Kazakhstan, although the rocket disintegrated. Currently, there are three astronauts on board the ISS, but Russia has now grounded the Soyuz, which means that the crew launches will not happen soon. Find more in Gizmodo.