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 ...
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 ...
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 ...
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