Kepler Mission Manager Update
http://www.nasa.gov/mission_pages/kepler/":24omdhm3 said:Feb. 8, 2010
Kepler experienced a safe mode event on February 2, 2010. A safe mode is a self-protective measure that the spacecraft takes when something unexpected occurs. During safe mode, the spacecraft points the solar panels directly at the sun and begins to slowly rotate about a sun-aligned axis. As a safety precaution, the spacecraft turned off a redundant system, photometer, and both star trackers.
The scientific data, collected since the last download of science data in January, was not in danger and was downloaded successfully via the NASA Deep Space Network during recovery operations. Engineers verified that all of Kepler's systems were functioning correctly and successfully recovered the vehicle from safe mode. The spacecraft resumed collecting scientific data on Feb. 5, 2010.