NASA X-Ray Potential Superfast Deep Space Comms

Where No Man Has Gone Before: A History of Apollo Lunar Exploration Missions (The NASA History Series)
By National Aeronautics and Space Administration, William David Compton

New technology could use X-rays to transmit data at high rates over vast distances in outer space, as well as enable communications with hypersonic vehicles during re-entry, when radio communications are impossible, NASA scientists say.

The technology would combine multiple NASA projects currently in progress to demonstrate the feasibility of X-ray communications from outside the International Space Station.

More information - http://www.space.com/34824-nasa-x-ray-tech-deep-space-communication.html