Around the Milky Way, there are many river-like structures made up of stars. They are called stellar streams. How these stellar streams formed remains unclear.
![](https://scx1.b-cdn.net/csz/news/tmb/2021/themilkyways.jpg)
Source:
https://phys.org/news/2021-03-milky-merging-history-reconstructing-cetus.html
Only the Autodidact is Free
Around the Milky Way, there are many river-like structures made up of stars. They are called stellar streams. How these stellar streams formed remains unclear.
Source:
https://phys.org/news/2021-03-milky-merging-history-reconstructing-cetus.html