A distant supernova, SN 2025mkn, became visible from nine billion light years away after a galaxy’s gravity bent and brightened its light, helping scientists study it in detail.

Seven astronauts were killed in the 1986 space shuttle Challenger disaster. Because a teacher was aboard, millions of schoolchildren watched the event live in school. Forty years later, many of those ...

A critical fire erupted this week at a SpaceX during testing in Texas.

Forty years ago today, Americans were stunned, shocked and saddened when the Challenger space shuttle exploded 73 seconds after liftoff on a cold, cloudless day in Florida. A booster leak ignited the ...