Strange, never-before-seen circles of radio waves have been discovered in space. Researchers in Australia say what is producing the "odd radio circles"—or ORCs—is unknown.

Giant, ‘Odd’ Circles of Radio Waves in Space May Finally Have an Explanation The mystifying orbs could be caused by galactic winds, propelled by a period of rapid star formation and death ...

Astronomers have captured a close-up image of a rare and mysterious space object, prompting a renewed push to discover its origin. Odd radio circles (ORCs) are gigantic rings of radio waves.