‘Ghosts of the radio universe’: astronomers have discovered a slew of faint circular objects #astronomy #radioastronomy #AstroSci https://theconversation.com/ghosts-of-the-radio-universe-astronomers-have-discovered-a-slew-of-faint-circular-objects-249141?utm_source=bluesky&utm_medium=bylineblueskybutton
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