'Alien' signals pinpointed as fast radio bursts come from dwarf galaxy

Rare and brief bursts of cosmic radio waves have puzzled astronomers since they were first detected nearly 10 years ago. Some suggested these mysterious bursts of energy could be a sign of alien life trying to contact us. Now the signals have finally been tied to a source - a dwarf galaxy more than 3 billion light years from Earth. Rare and brief bursts of cosmic radio waves have puzzled astronomers since they were first detected nearly 10 years ago. Now the signals have finally been tied to a source - a dwarf galaxy more than 3 billion light years from Earth. Rare and brief bursts of cosmic radio waves have puzzled astronomers since they were first detected nearly 10 years ago. Now the signals have finally been tied to a source - a dwarf galaxy more than 3 billion light years from Earth. Artist's impression pictured TRACKING DOWN THE ALIEN SIGNALS Fast radio bursts, or FRBs, were first 'heard' by radio telescopes back in 2007. A repeating burst discovered in 2012, however, provided the opportunity for a team of researchers from the University of California, Berkeley and Cornell University to repeatedly monitor its area of the sky. The team used the Karl Jansky Very Large Array in New Mexico and the Arecibo radio dish in Puerto Rico, in hopes of pinpointing its location.

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