Northrop bids dasvidaniya to rocket’s Russian engines.

Space tourism company makes room for experiments and prototypes.

Launch risks, cryogenic and uranium fuel are among the challenges facing the agencies’ ambitious DRACO space nuclear thermal propulsion orbital demonstration.

Our roundup of the main aerospace and defense stories making the news this week.

Seven missions have been set aside for the third-place winner.

Editors discuss the meaning of exponential smallsat growth, new technologies for flying satellites in formation and U.S. national security space needs.