

When the first image of black hole was due to be released, a few science channels had videos on what we should see (and did). And was also depicted as in the movie Interstellar.
had one of the first and supposedly the best and easiest to understand using visual aids.
The very simplest reason is because of the accretion disk, which is the only part we can actually see, and how the black hole’s gravity warps the back part of the disk around so we see many sides of it that we wouldn’t without the strong gravity bending the light. I.e., we don’t see the part of Saturn’s rings that are behind the planet.




I could think of a few subjects, but with such a short time to prepare I’d probably ramble on like a rabbit hole of connections to related stuff. It wouldn’t be a great TED talk overall.