https://academic.oup.com/mnras/article/528/1/693/7513209
ABSTRACT. In this paper, we construct the circular velocity curve of the Milky Way out to ∼30 kpc, providing an updated model of the dark matter density profile
The Milky Way is spinning. It's spinning wrong based on the stuff we see. So, scientists think there must be stuff we can't see making it spin that way. Some scientists have drawn a picture of what it would look like if we could see the stuff.
Clicked link hoping for picture of stuff we can't see, got words instead. 0/10 would not look at again
Edit: on second thought, article delivered exactly what was described verdict changed to 10/10 would recommend
The "dark" in dark matter means we can't see it or detect it, Even though we can "see" the effects of it.
While scientists search for what the answer can be, it's just called dark matter as a placeholder.
"Dark matter" is a stupid and misleading name. The fact is we have no idea if it's even matter.