![Visualization of a black hole with an orange accretion disk. The parts of the disk circling over and under the hole are actually gravitationally lensed from the back side of the black hole.[126][127]](https://cdn.deepswipe.app/images/0.2.0/fb881ca0833d776284de97629626b204e1aadd8b6a9ac942a2e60a8df1fabee0.jpg)
A black hole as ‘dense’ as water?
The average density inside the horizon drops as mass rises. A 10^8‑solar‑mass black hole has density comparable to water.Black Holes: The Big Ones Can Be ‘Low‑Density’
Why bigger looks ‘fluffier’
The radius grows with mass, but the enclosed volume grows even faster. Spread the mass across that huge volume, the average density plummets.Black Holes: The Big Ones Can Be ‘Low‑Density’
