Astronomers Detect Signals From Mysterious Objects Outside The Milky Way - Mashable India

In their paper, astronomers have reported that these objects are part of a new class of the astronomical objects that have been named as odd radio circles or ORCs.

The astronomers mentioned in their paper, which is still under review by Nature Astronomy, “We have found an unexpected class of astronomical objects which have not previously been reported, in the Evolutionary Map of the Universe Pilot survey, using the Australian Square Kilometre Array Pathfinder telescope.”.

All four ORCs were found to only be observable at radio wavelengths and didn’t show up on either the optical, infrared or X-ray wavelengths.