Nasa to Fly Deep Space Atomic Clock

[Book O'Dead]

"When people think of space technologies, many think of high-tech solar panels, complex and powerful propulsion systems or sophisticated, electronic guidance systems. Another critical piece of spaceflight technology, however, is an ultra stable, highly accurate device for timing - essential to NASA's success on deep-space exploration missions. "

http://www.nasa.gov/mission_pages/tdm/clock/dsac.html