The first U.S. missile defense review in nine years will present the Space Sensor Layer as a necessary upgrade for U.S. forces to confront a growing array of hypersonic boost-glide and cruise missiles.

“To continue delivering for our customers and to succeed in developing interplanetary spacecraft and a global space-based internet, SpaceX must become a leaner company," the company says.

A future sat constellation aimed at tracking zigzagging hypersonic glide vehicles will soon enter the prototyping stage, the U.S. Missile Defense Agency says.

NASA’s New Horizons mission team greeted the first signals on Jan. 1, confirming their spacecraft had successfully carried out its close flyby of Ultima Thule.

A SpaceX Falcon 9 rocket poised to deliver the first satellite of the U.S. Air Force’s next-generation GPS III network remained on the ground Dec. 18 after an automated abort.

Spacewalking cosmonauts Oleg Kononenko and Sergey Prokopyev labored outside the ISS's Russian segment Dec. 11 to survey the site of the small hole in the Soyuz MS-09 capsule’s habitation compartment that was detected in late August.

A week after NASA’s Osiris-Rex asteroid sample return mission spacecraft arrived at the asteroid Bennu, scientists see early signs of a carbon- and water-rich object.

The abort was the first unplanned shutdown during a terminal count of a Delta IV Heavy, which has flown 10 times since its debut in 2004.