However, during these early years of spaceflight, NASA engineers and astronauts cut their teeth on a variety of spaceflight ...

Across July 14-15, 1965 (depending on your time zone), the Mariner 4 mission was doing something incredible. This early NASA mission performed the first flyby of Mars and took the first close-up ...

Last year, scientists detected a mysterious, powerful burst of radio waves originating from within our galaxy. Now, astronomers think it was caused by a long-dead NASA satellite — but they're not sure ...

"That Mars is habitable by beings of some sort or other is as certain as it is uncertain what these beings may be," wrote Percival Lowell in the early 20th century. While other astronomers had their ...