Fleets of radar satellites are measuring movements on Earth like never before

Measuring Earth’s surface like never before, and the world’s fastest random number generator

Astrophysicists create the most accurate 'flat map' of Earth ever

US to support international effort to set rules of behavior in space. US Space Command is taking a central role in this effort amid growing alarm about Russia’s anti-satellite weapon tests and concerns that the proliferation of satellites and debris is rapidly cluttering Earth orbit.