Two galaxies that didn't quite merge

https://www.legacysurvey.org//viewer/?ra=359.0947&dec=-0.2678&layer=hsc-dr2&zoom=12

These appear to be separate galaxies that have little interaction with one another, but if you look carefully you can see streams of stars connecting the two and spreading out on the other side of the smaller one. The two galaxies seem to have had a “close encounter” but gone their separate ways, spewing millions of stars out into open space between them. This is one of the longest interaction trails I have seen, thanks to the depth of the HSC DR2 images.

2 Likes