I know it's odd to hear now after 2 years but... none of the "photo's" of blackholes real...
Taking a look at NASA's site, any that show the actual blackhole are stated as "An artist's drawing..."
We actually don't have any telescopes to resolve any known blackholes (they're too far and waaay to small.)
Speaking of small, a blackhole with an event horizon that big would be magnitudes more massive than our sun. As comparison our sun would only be around 3 km (1.9 mi) across as a blackhole and the earth would be 9mm (0.35in)
I know it's odd to hear now after 2 years but... none of the "photo's" of blackholes real... Taking