In 1947, a pilot spotted a fleet of “saucer-like” aircrafts speeding across the sky. It was only a matter of time until paranoia set in.

Every 10 years, astronomers weigh in on the state of their field. For the first time, they're tackling Earth-centric issues like gender bias and diversity. 

The history of the search for extraterrestrial life is a good way to understand the unintended consequences of fence-building and boundary-setting in other disciplines.

Space is getting closer, thanks to small, cheap “satlets” that network themselves to solve problems in flight.

Space entrepreneurs tend to share a fondness for libertarian principles. So before checking into your space hotel, be sure to read your Heinlein.