On April 7, 1983, astronauts took the first spacewalk outside of a space shuttle during mission STS-6. This was the maiden voyage of the space shuttle Challenger. The goal of this mission was to

NASA's Artemis II mission will launch with SLS rocket engines that have flown multiple times on past space shuttle missions. Here's their story.

In 1989, President George H.W. Bush announced the Space Exploration Initiative with the goals of going back to the moon "to stay" and, eventually, missions to Mars, Muir-Harmony said. The initiative was ended by Bush's successor, President Bill Clinton, due to costs and in favor of less expensive missions.

For the first time in more than 50 years, humans are preparing to travel beyond low-Earth orbit and return to the Moon.

In high-stakes roles, NASA launch and mission control teams on the ground will keep the Artemis II astronauts safely on track during a 10-day journey around the moon.

On January 28, 1986, Space Shuttle Challenger broke apart just 73 seconds after liftoff. Pilot Michael Smith's final words revealed something was very wrong.