One of the longest-running battles in Washington is not over the war in Ukraine or the wisdom of tariffs and tax cuts but ...

Space-Track.org, an online space launch database, added a peculiar entry. An unidentified object that flew into orbit as TBA, ...

President Donald Trump announced a plan to build a missile defense system, called the Golden Dome. How exactly does it work?

Canada already plays a vital role in the North American Aerospace Defense Command, and dozens of radars in Canada help provide Americans early warning of incoming missiles.