The puzzling circular objects were captured on cameras during a survey involving the Australian Square Kilometre Array Pathfinder telescope, and proved to feature, quite unexpectedly, no commonly observed optical, infrared, or X-ray counterparts to the diffuse emission.

An Australia-based research group has discovered a never-before-seen space phenomenon – circles of radio waves now dubbed “odd radio circles”, or more commonly ORCs, leaving scientists puzzled as to what could have caused them, a review in Nature Astronomy suggests. The results of the study have yet to be peer-reviewed.

The objects were zoomed in on while the researchers were conducting a survey of the universe using the Australian Square Kilometre Array Pathfinder telescope (ASKAP).

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