Is There a Black Hole?

This gas cloud wasn't going to get that close. It was going to approach like a couple hundred a u, but close enough so you could get some information about the black hole. But wait, how close did it get? I thought we we could only see up to like 12 a u. That's the closest that anything has ever come to the black holes. You cald measure, for example, like the slope of the gravitational field weri.