A NASA spacecraft around the moon has photographed the crash site of a Japanese company's lunar lander.

North and South Korea have been technically at war for almost 70 years now, but their leaders are meeting each other for talks in the demilitarized zone.

Multi-Reward Proximal Policy Optimization, a multiobjective deep reinforcement learning algorithm, is used to examine the design space of low-thrust trajectories for a SmallSat transferring between ...