Exceptionally rare radio sources detected in the distant universe

[slater]

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

[8bitsrule]

Article: "Astronomers have previously detected less than 30 such clusters with relic pairs. But the upcoming Square Kilometre Array being built in South Africa and Australia could be a "game changer,"

Radio observing got off to a slow start (after Jansky), but considering the size of those arrays ... yeah!