This claim was, in fact, true. McCandless was, indeed, the first astronaut to perform an untethered spacewalk on Feb. 7, 1984 ...

SpaceX’s actual main challenger at the moment is Blue Origin, a firm founded by Jeff Bezos in 2000, 18 months before SpaceX’s ...

After stage separation, the rocket's first-stage booster completed its 20th flight by touching down atop a SpaceX drone ship ...

A new documentary, Spacewoman, explores the inspiring story of the astronaut who led NASA's "Return to Flight" after the ...

Here are the eight science lessons McAuliffe planned on teaching during her trip on the Challenger shuttle ... rocket has to carry into space, the more expensive the launch is.

The space shuttle Challenger had exploded a little more than a minute after launch, killing everyone on board. The commission’s job was to find out what had gone wrong and how it had happened ...

so its first launch unfortunately was the Challenger disaster of January 1986, killing Teacher-in-Space Christa McAuliffe and six NASA astronauts. After the shuttle returned to flight in 1988 ...

Today marked the penultimate flight for the NASA shuttle program with the 25th and final liftoff of the space shuttle Endeavour ... this year in Tucson, AZ during a shooting spree that wounded ...