‘Ghostly sky circles’ that baffled astronomers might be explosions from distant galaxies
The rings were unlike anything seen before, and we had no idea what they were. We dubbed them odd radio circles or ORCs. They continue to puzzle us, but newdatafrom South AfricasMeerKATtelescope are helping us solve the mystery. We can now see each ORC is centered on a galaxy too faint to be detected earlier. Our paper showing these resultshas been peer-reviewed and accepted for publication by Monthly Notices of the Royal Astronomical Society....