Using one cosmic mystery to probe another, astronomers have analyzed the signal from a fast radio burst, an enigmatic blast of cosmic radio waves lasting less than a millisecond, to characterize the diffuse gas in the halo of a massive galaxy.
![](https://scx1.b-cdn.net/csz/news/tmb/2019/galaxyfoundt.jpg)
Source:
https://phys.org/news/2019-09-galaxy-tranquil-sea-halo-gas.html