I n 1963, the Arecibo Observatory became operational on the island of Puerto Rico. Measuring 305 meters (~1000 ft) in ...

In a theoretical study, researchers explored how a twin Earth with human-like life and technology might detect our ...

Using the Five-hundred-meter Aperture Spherical radio Telescope (FAST) and by analyzing archival Arecibo Observatory data, ...

If an extraterrestrial civilization existed with technology comparable to ours, would they be able to detect Earth?

A research team led by Dr. Sofia Sheikh of the SETI Institute, in collaboration with the Characterizing Atmospheric ...

Virkki used radar to track near Earth objects at the Arecibo Observatory in Puerto Rico until the 900-ton equipment platform ...

If extraterrestrial civilizations exist with technology similar to ours, could they detect Earth? A team of SETI researchers ...

Note: As of January 2025, the site is closed to the public until further notice. The Arecibo Observatory has a rich history. Scientists used the site's massive telescope to collect data about ...

SETI scientists try to determine whether aliens at a similar technology level to humans could detect Earth and from how far ...

Earth's pollution and technology might reveal our presence to aliens. From radio signals to city lights, scientists study ...

The latest research aims to not only assess how detectable we are but also to refine the methods used in the search for other ...