A private space company announced Tuesday that it had landed a rocket upright and gently enough to be used again, a milestone in commercial aeronautics.
Reusing rockets, rather than discarding them, would be a big step toward making space flight less expensive.
The achievement produced "the rarest of beasts: a used rocket," Jeff Bezos, founder of the company Blue Origin, said in a statement. He is the CEO of Amazon.com Inc.
Another private company, SpaceX, has tried to land boosters upright on a barge in the ocean but so far has failed. It has recorded soft landings on the ground by rockets that flew less than a mile high, an altitude far lower than what the...