Aerospace

lunar water
NASA “Flashlight” will hunt for hidden water on the moon
methane
NASA detects 50+ methane “super-emitters” from space 
mars crate
Meteorite blasts “biggest new crater” NASA has ever seen into Mars 
positioning system
Starlink satellites can be reverse-engineered to create new GPS
space advertising
Space ads could earn $2 million a day, say Russian researchers 
starlink aviation
SpaceX announces Starlink Aviation service for planes
reusable rocket
First-of-its-kind rocket engine nears first flight test
Dimorphos
NASA’s mission proves it can redirect an asteroid — and potentially save Earth
planetary defense
How NASA plans to stop killer asteroids 
artificial retinas
A cure for blindness may be first product made in space