Astronomy
The Search for Technosignatures from Advanced Extraterrestrial Civilizations
Quick fact
Modern searches for technosignatures scan for narrowband radio signals, pulsed lasers, or even giant structures that block starlight, but so far, no confirmed technosignature has been found. However, the search has only covered a tiny fraction of the sky and a narrow slice of the electromagnetic spectrum.
Why this is interesting
Have you ever wondered if we are not alone in the universe? Astronomers are actively looking for signals of advanced extraterrestrial technology—what would that signal look like?