Even at this early stage in our spacefaring age, humanity has already begun sending probes that will eventually reach other ...

Strange interstellar comet speculated to be alien spacecraft is older than Solar System - Scientists say comet represents ...

New research suggests that alien radio signals may be transformed by plasma from their home stars — and scientists on Earth ...

A NASA‑linked study argues that alien probes could already be in our Solar System, but our surveys are still too crude to ...

Astronomers studying the interstellar comet 3I/ATLAS say it could be a 12‑billion‑year‑old relic formed in near‑absolute‑zero ...

Somewhere out there, a planet roughly the size of Earth may be orbiting a distant star in conditions that could support life. The problem is not finding the star.

Deep within Uranus and Neptune, immense pressure and heat are transforming carbon into diamonds that rain down through the ...

The winds on seven hellish alien worlds are moving in the wrong direction. That strange anomaly just cracked open one of exoplanet science's biggest mysteries.

In 1988, the Soviet Union launched two of its most ambitious spacecraft ever built not toward Mars itself, but toward one of ...

James Webb has revealed that the sunrise and sunset sides of WASP-121 b have surprisingly different atmospheres.

Scientists propose building a lab on the moon to screen Mars and other space samples for alien microbes before they ever ...