Spacecraft that could fuel up in orbit would be less weighed down at liftoff and fly deeper into space; making those refills happen is a big challenge ...

Explore Jeff Bezos' plans for Blue Origin, his rivalry with Elon Musk, and the surprising space race to Mars involving NASA ...

Blue Origin is gearing up for the second-ever launch of its New Glenn rocket, set to carry NASA’s ambitious ESCAPADE mission ...

Delaying Mars Sample Return will make the human exploration of Mars significantly more expensive and dangerous — and for the ...