How can radio astronomers successfully identify extraterrestrial radio signals while discerning them from Earth-based radio signals? This is what a recent study published in The Astronomical Journal ...

Scientists have proposed building a lunar quarantine facility to examine samples returned from Mars and other celestial ...

Protecting planets from extraterrestrial invasion might sound like a job that only exists in science fiction. But NASA recently posted a "Help Wanted" ad for exactly this position, under the name ...

What are the chances that aliens would visit? Andromeda, pictured here, is our nearest galaxy. There are an estimated 100 billion galaxies – and 40 billion Earth-sized planets orbiting in the ...

A “selfie” taken by the Perseverance Mars rover as it examines Cheyava Falls, an arrowhead-shaped rock in the center that contains potential biosignatures of past Martian life. Credit: ...