Strange Signals

On April 28, 2020, two ground-based radio telescopes detected an intense pulse of radio waves. It only lasted a mere millisecond but, for astonished astronomers, it was a major discovery, representing the first time a fast radio burst (FRB) had ever been detected so close to Earth.

Located just 30,000 light-years from our planet, the event was firmly within the Milky Way, and it was, to all intents and purposes, almost impossible to miss. The Canadian Hydrogen Intensity Mapping Experiment (CHIME) and the Survey for Transient Astronomical Radio Emission 2 (STARE2) certainly had no problems picking it up. 

"CHIME wasn’t even looking in the right direction and we still saw it loud and clear in our peripheral vision," said Kiyoshi Masui, assistant professor of physics at the Massachusetts Institute of Technology. "STARE2 also saw it, and it’s only a set of a few radio antennae literally made out of cake pans."

Until that point, all FRBs had been observed outside our galaxy. "They’ve been billions of light years away, making them a lot harder to study," said doctoral candidate in physics Pragya Chawla from McGill University in Canada. 

April 2020’s discovery was also notable for being the most energetic radio blast that astronomers have ever recorded in the Milky Way, but what made it most exciting is that scientists are now closer to determining the origin of FRBs than at any point since they were first discovered.  TO READ MORE, CLICK HERE...