On January 28, 1986, the Space Shuttle Challenger exploded after it was launched from Kennedy Space Center in Florida in just 73 seconds which claimed the lives of seven astronauts.
Jan. 23, marks a day of remembrance for NASA and the Astronauts Memorial Foundation. The solemn ceremony pays tribute to the lives lost in three of the most tragic moments in NASA's history.
While SpaceX lost the upper stage of its new Starship in a flight test, the futuristic spacecraft presages a spaceflight revolution, says a leading U.S. space scholar.