Well it's black, and it might be a hole...
But as I said it's impossible to try to draw a black hole, that's why I couldn't recognise it (I've seen it in so many different ways!), and I prefer to represent it with a time-space singolarity.
Here's another image that shows how big known universe is (click to see the bigger image):

I guess space is even bigger if you believe theories stating that there are other universe's. I have my own theory which in 4 years is going to be my university thesis