Wow! Signal: Origin of possible alien signal narrowed down

The Wow! alien signal may have come from the constellation Sagittarius.

Researchers may have pinpointed the source of a famous supposed alien broadcast discovered nearly a half century ago.

The prominent and still-mysterious Wow! Signal, which briefly blared in a radio telescope the night of Aug. 15, 1977, may have come from a sun-like star located 1,800 light-years away in the constellation Sagittarius.

"The Wow! Signal is considered the best SETI candidate radio signal that we have picked up with our telescopes," Alberto Caballero, an amateur astronomer, told Live Science.

SETI, or the search for extraterrestrial intelligence, is a field that has been listening for possible messages from otherworldly technological beings since the middle of the 20th century

The now-deconstructed Big Ear telescope looked for messages at the electromagnetic frequency band of 1420.4056 megahertz, which is produced by the element hydrogen.

Since hydrogen is the most abundant element in the universe, there is good logic in guessing that an intelligent civilization within our Milky Way galaxy desirous of attracting attention to itself might broadcast a strong narrowband beacon signal at or near the frequency of the neutral hydrogen line

"I don't think it’s a coincidence that the point in human history where we start putting intelligent signals in space is also the same point in history where we get the idea to look for intelligent signals from space," Charbonneau said.

Universe Is Acting Weird Cosmic lenses may help reveal why