When we think about asteroids that could threaten Earth, we often imagine massive, city-sized rocks hurtling through space. But what if the real danger comes from much smaller, barely detectable ones?

The White House has proposed unprecedented cuts to NASA’s budget - the largest in the agency’s history. If approved, this withdrawal of funding would force the cancellation of many major programs, ...

The question “are we alone in the universe?” has fascinated people for centuries. In 1959 two Cornell University physicists described how we might answer that question through interstellar ...

Stunning stellar explosions occur every second across the cosmos – some observable, most too distant to ever know, all of ...

The SETI Institute partners with Unistellar, a company that intends to reinvent popular astronomy through the development of the Enhanced Vision Telescope (eVscope), a mass-market digital scope that ...

This spring, skywatchers have been treated to the captivating and unpredictable display of a new comet, called C/2025 F2 ...

For decades, many scientists have relied on the "hard steps" model to suggest that intelligent life is rare — the improbable ...

In 1974, the most powerful broadcast ever deliberately beamed into space was made from Puerto Rico. The broadcast formed part of the ceremonies held to mark a major upgrade to the Arecibo Radio ...

SETI Live is a weekly production of the SETI Institute and is recorded live on stream with viewers on YouTube, Facebook, LinkedIn, X (formerly known as Twitter), and Twitch. Guests include astronomers ...

What is the Allen Telescope Array? The Allen Telescope Array (ATA) is located at the Hat Creek Observatory in the Cascade Mountains of California, approximately 300 miles to the north of San Francisco ...

For 40 years, the SETI Institute has been a leader in the search for life and intelligence beyond Earth. Recent discoveries, such as exoplanets, have brought us closer than ever to answering the ...