Astronomers have mapped about a million previously undiscovered galaxies beyond the Milky Way, in the most detailed survey of the southern sky ever carried out using radio waves.
![](https://scx1.b-cdn.net/csz/news/tmb/2020/wevemappedam.jpg)
Source:
https://phys.org/news/2020-12-weve-million-previously-undiscovered-galaxies.html