We found some strange radio sources in a distant galaxy cluster. They're making us rethink what we thought we knew. - The Conversation Indonesia

One of the objects is a ‘fossil’ radio source – a leftover from the death of a supermassive black hole that once shot out huge jets of plasma.

The universe is littered with galaxy clusters huge structures piled up at the intersections of the cosmic web. A single cluster can span millions of light-years across and be made up of hundreds, or … [+5592 chars]

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