it gets slowed down as soon as it enters the event horizon.

No, it doesnt. It speeds up as it approaches singularity. We visually percive it as slowing down, because the space/time connection is distorted, due to extraordinary gravitational force.

I liked this remark :P, we can all be reading about this on wiki or any other link, and repeat theories with wich scientists came up but one of the real facts still is that scientist dont know that much about functions of a black hole,and also "im just going to say it" *scientist can be wrong* no scientist ever jumped in a black hole and got out "*?on the other side?*" if there even is such a thing, so yeah the only way to start understanding how it really works is to replicate it so we can study it, but should we dumbf*cks really be screwing with forces like that. Even if Chances were 1 in a billion that a freak accident happens wich disrupts our athmosphere, the fact that we know we do not yet know about these chances either because of the not knowing how it really works. It would seem logical to me to take these studies with baby steps. Maybe first learn how to get into deep space on a spot with allmost no planets or stars and do our little science thingy there.
I think its a typical human trade to be experimenting like this, a little patience never hurt anyone, the atom bomb did.

But then again, maybe a black hole could help us get into deep space...

Oh, you're talking about light orbiting a black hole? Sounds plausible, but no way we'd ever see it.

Lol. Orly?
That is completely contradictory to most of what we know about black holes :P
The only way we can observe black holes, is to see the orbiting material, and conclude that said material is in orbit around an invisible singularity. So, we assume black hole. If we can see the orbiting material, then light is present; ergo light is in the orbit of any observable black hole.

ITT people keep talking about shit they know nothing about.

At least people have started to drop words from the first 3 sentences of wikipedia, like "singularity" and "event horizon", but still state what is essentially theoretical physics pertaining to general relativity as though it is fact.

I'd suggest everyone stop posting and learn the subject matter first.

Suck my white hole, it'll only take you 500 years and you'll be finished by lunch time this arvo.

No.
Black holes are observable because they are a hole.

>implying black holes are distinguishable from "empty" space

Lol. Again. Black holes aren't holes at all. Its like saying the sun is a hole, just because it exerts gravitational force.

The X-ray emissions could point to the presence of the black hole
Or, if a massive black hole were surrounded by large amounts of orbiting material gas, dust, even stars their rapid motion close to the hole could be observable via shifts in the energy of the radiation they emit.
To confirm that black holes actually exist, we'll need to be able to observe the gravitational waves they produce as they form or interact.