Whenever UFOs make the news, standards of skepticism start to slip.
After Puerto Rico’s Arecibo telescope collapsed late last year, the researchers who depended on it are in a tough position.
Have we become too squeamish about the inevitable human cost of exploration?
How astronomers deputized early internet users to help find alien civilizations
A vocabulary that captures the expanse of the universe could help us to make sense of it.
Recent scandals have forced the field to confront a pervasive culture of gender discrimination and abuse.
A half-century ago, a rejected scientist turned violent.
Better technology means people can record more data about what's happening in space than ever before. It also means we're seeing things we never knew were there.