The newly-discovered dark dwarf galaxy Antlia 2’s collision with the Milky Way may be responsible for our galaxy’s characteristic ripples in its outer disc, according to a study led by Rochester Institute of Technology Assistant Professor Sukanya Chakrabarti.
![](https://3c1703fe8d.site.internapcdn.net/newman/csz/news/tmb/2019/2-newevidences.jpg)
Source:
https://phys.org/news/2019-06-evidence-antlia-gave-milky-ripples.html