re: Someone Explain to me what a Black Hole is..

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When you have some stuff, it attracts other stuff -- something we usually call gravity; the most obvious example is when you jump and are tugged back down to Earth. One neat caveat of gravity is that it grows stronger when dealing with more massive stuff (i.e. things with more mass). Gravity tends to compact things tighter and tighter together, which usually ends up being round (that's why planets tend to be spherical!). Anyways, imagine you have a lot of stuff in space. Gravity pulls more stuff towards it, and so you end up having even more stuff which thus attracts even more -- all being compacted into a small space. Black holes are places with so much stuff in such a compact place that gravity doesn't let anything escape the area -- not even light! Black holes are usually formed by something called gravitational collapse, much like what I described earlier. Some scientists think black holes might possibly be created using high-energy particle accelerators like the CERN lab in Switzerland, but it's mostly speculation.

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