EditorialAn image from NASA of the Perseverance rover as it is lowered by the sky crane to the surface of Mars on Feb. 18, 2021. (NASA via The New York Times)
EditorialGerald Carr, commander of the Skylab 4 mission in 1973-74, demonstrates zero gravity in the space station, which crashed back to Earth by the time the space shuttles began flying in 1981. (NASA via The New York Times)