The Kepler spacecraft has a failure

Two of four reaction wheels seized up, critical for precise photometry Excerpt from the Kepler Mission Manager Update. (h/t to Dr. Leif Svalgaard) At our semi-weekly contact on Tuesday, May 14, 2013, we found the Kepler spacecraft once again in safe mode. As was the case earlier this month, this was a Thruster-Controlled Safe Mode.…