SpaceX, Blue Origin, and others want enormous orbital data center constellations, prompting warnings over atmospheric pollution, debris, and an astronomy problem satellites are already making worse.

Astronomers have found strong evidence for a Jupiter-mass object orbiting a brown dwarf, potentially marking the first convincing detection of a moon beyond our solar system.

China became the only other entity to recover an orbital rocket booster, but used a cable net on a ship instead of landing legs.