The South African Radio Astronomy Observatory’s MeerKAT radio telescope (SARAO) has captured a new detailed image of ‘astronomy’s newest mystery’: odd radio circles or ORCs.
“So far, they are unexplained. Since their discovery in 2019, astronomers have proposed different explanations for them, including galactic shockwaves, or the throats of wormholes. What are they?”
https://earthsky.org/space/odd-radio-circles-orcs-new-image/