NEW YORK — SpaceX’s latest attempt to land a rocket upright on a platform in the Pacific Ocean failed in a spectacular fashion on Sunday. The unmanned mission, powered by a SpaceX rocket, accomplished ...

NASA is set to launch three small rockets into the upper atmosphere late Monday, and some people on the East Coast may be able to see colorful vapor trails that will be released shortly after liftoff.

In an effort to oust the Soviets in the space race, NASA’s Mariner I spacecraft was prepared to make history as the first spacecraft to complete a flyby survey of Venus. Then, on July 22, 1962, the ...