Upsilon wrote:has anyone known if we (humans) have ever seem somthing enter into a black hole. Not that it would be very interesting. But have we even seen a black hole either? Sending some type of extremely small transmitter through it be possible?
Well, we have seen things that are in the process of falling into a black hole. Matter that is being sucked in tends to form "accretion disks" and emit increasingly high frequency radiation as they accelerate. But of course, once inside the event horizon, matter is no longer observable.
As for seeing hole, it depends on precisely what you mean by that. We can see the effects of black holes, but so far, we haven't been able to see a black hole directly. By that, I mean we don't have a picture that shows a little black dot, surrounded by matter; although some scientists say that such a picture could come sometime within the next 5 years or so, as technology continues to improve.