SpaceX aims to let astronauts avoid a radio blackout during re-entry

SpaceX is about to test a system aimed at overcoming the communications blackout that happens when a spacecraft re-enters Earth’s atmosphere from orbit.

Almost every spacecraft that has returned to Earth has suffered a break in communications during re-entry as the atmosphere slows it down. The same friction that decelerates the spacecraft also heats the air below the craft until it ionises into a glowing, conductive plasma. This quickly forms a…