Seven American spacefarers were killed in a tragic event 40 years ago today that has become widely known as the Challenger disaster.

Wednesday marked 40 years since the space shuttle Challenger accident that killed seven crew members. The mission was not just to launch satellites but to launch the first teacher in space.

CAPE CANAVERAL, Fla. — NASA marked the 20th anniversary of the space shuttle Columbia tragedy Thursday with somber ceremonies and remembrances during its annual tribute to fallen astronauts. More than 100 people gathered under a gray sky at Kennedy Space ...

It's been 10 years since the Columbia space shuttle accident, and spaceflight safety has come a long way — but has it come far enough? Experts say traveling to space is still a risky business, and while future accidents may not be inevitable, they aren't ...

Families of the astronauts lost in the space shuttle Challenger accident are marking that tragic day 40 years ago