Radio telescopes detect signals from billions of years ago, but radio-frequency interference presents challenges.

For over 100 years, scientists have been hell-bent on talking to aliens, and new technology could give that hunt a boost.

Most of them flare just once, randomly, making them impossible to predict, and very difficult to trace back to a source. Some ...

Astronomers have detected mysterious radio signals from Proxima Centauri, the closest star system to Earth. Could this be the ...

Suspicious late-night radio signals in coded Bengali, Urdu, and Arabic detected by amateur Ham radio operators along the Indo-Bangladesh border have raised concerns about potential extremist ...

A dead galaxy shouldn't produce bursts of radio light. Yet this 11 billion-year-old one did — throwing scientists for a loop.

Strange radio signals might be a sign of an artificial transmission from an alien species. But our Milky Way galaxy is swimming in radio emissions of all sorts, from exploding stars to the ...

A powerful solar flare unleashed by the Sun on Sunday caused a radio blackout across parts of the Pacific Ocean, the US ...

The FCC requires that a translator be identified. There are two ways. You can announce the call letters of the translator ...