hero-image.fill.size_... jpg
(120.33 KB, 1248x702)

images-2.fill.size_20... jpg
(142.01 KB, 1999x958)

> Exceptionally rare radio sources detected in the distant universe

Astronomers have spotted a pair of exotic features believed to be the aftermath of a colossal cosmic smackdown — not between two galaxies, but two groups of galaxies. 

These glowing arcs of radio energy are known as "radio relics," faint clouds resulting from powerful shockwaves surging through hot gas that fills the space amid a galaxy cluster.

The team, led by Kamlesh Rajpurohit, an astronomer at the Harvard & Smithsonian Center for Astrophysics, thinks the newfound radio relics formed when shock fronts sped through space following two clusters wrecking. These waves can force particles to shine in radio light.

https://mashable.com/article/galaxy-collision-rare-radio-relics-image