Astronomers Solve the Mystery of Giant Radio Circles

The circles could be  shells created by outflowing galactic winds, maybe from massive supernovae explosions. These extremely quick outflowing winds can be produced by massive “starburst” galaxies

Giant radio galaxies defies conventional wisdom

When we look far into the distant universe - we expect to find distant giant radio galaxies comparatively small. But to our surprise the new research found that these giants still appear enormous even though they are so far away.