WASHINGTON — A year from now, the U.S. Navy hopes to launch a pair of small satellites that are able to harvest electrons from space and use them and the Earth’s magnetic field as a propulsion system.

Electrodynamic tether (EDT) can be used propulsion and power generation for a spacecraft in the Jovian system. The environment of the Jovian system has properties which are particularly favorable for ...

(Nanowerk Spotlight) Most of today's rocket engines rely on chemical propulsion. All current spacecraft use some form of chemical rocket for launch and most use them for attitude control as well (the ...