The Callisto, program includes five flights, the last one involving landing on a barge in the Atlantic Ocean.

A pair of European- and Japanese-built orbiters are headed to Mercury for a flagship science mission to learn more about the Solar System’s innermost and least-explored terrestrial planet.

House and Senate Democrats differ on how the U.S. military should operate in space, and an influential Senate lawmaker is advocating for a combatant command similar to U.S. Cyber Command.

Allen’s death from non-Hodgkin lymphoma comes as one of his most cherished projects, the Stratolaunch air-launch system carrier aircraft, nears its long-delayed first flight.

NASA intends to conduct its own inquiry into the Oct. 11 Soyuz MS-10 launch abort.

The booster anomaly was identified shortly after liftoff on Oct. 11, triggering a ballistic re-entry of the capsule and subjecting the crew to higher-than-normal G forces.

SpaceX completed a picture-perfect nighttime recovery of the first Falcon 9 booster stage on the U.S. West Coast after launching the SAOCOM 1A radar-imaging satellite for CONEA, Argentina’s national space agency, from Vandenberg AB, California on Oct. 7.

Northrop Grumman plans to wrap up its first round of ISS cargo delivery missions for NASA with a year-long demonstration of its Cygnus freighter’s abilities.