NASA has spent over half a century making sure that no human ever floats off into space. Various thruster systems have been developed to help astronauts save themselves in the event of an emergency.

KENNEDY SPACE CENTER — The two new members of the U.S. Astronaut Hall of Fame may be the 112th and 113th members to be enshrined, but they’re part of an even smaller club. They both touched the Hubble ...

The two solid rocket boosters flew in different directions as the external fuel tank became a fireball.(AP: Bruce Weaver / File) Forty years ago, the Challenger space shuttle disintegrated just after ...