Oei and his colleagues used the Low Frequency Array - a sprawling network of radio dishes spread across 8 European countries - to scan a swath of the sky for long, rolling radio waves from supermassive black holes feasting on the entrails of their host galaxies. They found more than 8,000 pairs of what astronomers call relativistic jets: beams of energy and high-speed charged particles spewing outward from the poles of a supermassive black hole.
In other words, one black hole is continuously erupting energy and plasma into space across a distance more than 140 times longer than our whole galaxy, and it's carrying the power of trillions of stars. Oei and his colleagues nicknamed the pair Porphyrion.
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