The new satellite is akin to going from flying a commercial plane to a military aircraft, the head of Combat Forces Command said.

Rockets are one way to get things into orbit – but there's a growing number of alternatives in development that aim to do things significantly cheaper, by accelerating launch vehicles to hypersonic ...

Orbital mechanics can be a bit counter-intuitive. We have to slow down an orbiting space craft to convert kinetic energy for gravitational energy. The orbital altitude is raised at its highest point ...