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Ludwig M. Böss et al 2023 ApJL 957 L16
When an infalling galaxy meets an outward-moving shock wave, it can invert the typical arc-like shape of a radio relic and create a “wrong way” relic instead.

Mackenna L. Wood et al 2023 AJ 166 247
A new age of 41 million years has been calculated for the Carina association, one of the closest stellar associations to Earth; this age is consistent with the older end of previous age estimates.
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