Well, unfortunately, I lost my paper in a format, so I will start form scratch
A star is made by numerous gases (mainly Hydrogen) being pulled together by gravity. As all of the gases get compacted together, they burn and release light. The Hydrogen then forms Helium, which gives off much radiation when it burns (because of the very strong bonds) and turns into heavier elements. Eventually, it turns to lead or iron (I cannot remember which) in the center of the star. Eventually, the energy of the exploding gases and the high gravity of the solid, non-combustible core cannot keep the star from collapsing. The star does not collapse when it is young because of the frequency and energy of the explosions. Since there is less fuel to burn, it collapses on itself. If the mass is low for a star, it forms a neutron star (which I do not know much about). If the mass is too high, it forms a Black Hole, an object with such high gravity that not even light can escape its surface.
Most of the matter of the star (minus the gases that were blown off in the supernova) is crushed into an infinitely small, infinitely dense point called a singularity. Black Holes can "eat" entire solar systems and eventually galaxies (there is a theory that I believe in that says that there is a black hole in the center of every galaxy that will eventually consume the entire galaxy, INCLUDING the Milky Way...). When a black hole feeds, the prey's gases swirls around the black hole, accelerating to infinity. (When it gets to infinity, it is said to leave space-time as we know it, I will get into that later). The gases heat up do to friction and release light, which is why we can "see" black Holes. A recent theory by Stephen Hawking shows that when a black hole is not feeding, energy (which is now called 'hawking radiation') does escape from the black hole, which will eventually cause it to evaporate. This is caused by a theoretic phenomenon.
At every instant in empty space, virtual particles are being created and destroyed at every moment. A virtual particle and anti-particle are created for the sole purpose of being destroyed. This does NOT violate the conservation of energy because they cancel each other out. If a virtual photon and anti-photon are created and one gets sucked into the black hole, the other has no purpose because its sole purpose was to be destroyed (it is a sad life for a virtual particle) so it becomes a real photon. I really do not understand too much about this.
Now, on to relativity. Gravity, as told by Einstein, is said to bend space-time, AKA the fabric of time, AKA the 4th dimension. Imagine a rubber sheet, which represents space-time. Place a heavy ball (represents a massive body, such as a star or planet) on the center. This bends the rubber sheet. The heavier the ball, the more it bends the sheet (the more gravity it has). Now, take a ball bearing (a "photon") and roll it on a straight line past the heavy ball. The ball bearing curves around it and eventually rolls into the Ball. Now, at the speed of light, that bearing will change course briefly and will not slow down and go into the Ball. This is relativity in a nutshell. Since gravity accelerates everything, no matter what, light has to be accelerated. But, the speed of light in a vacuum is constant. Since the definition of acceleration is a change in speed or direction, speed in this case cannot change. So gravity changes its direction, so it causes light to curve.
In the case of a black hole, it bends space time to infinity, so it puts a hole in space time. When a photon travels too close to a black hole, it curves around it. It curves so much that it gets closer to the center. When it passes the so-called "Event Horizon," the curvature of the path of the photon goes to infinity and is lost forever. This is like being flushed down the toilet. This is the end of time for anything that enters the black hole.
You can read much more in Stephen Hawking's Best-Sellers A Brief History of Time and/or The Universe in a Nutshell
Hope this has enlightened you, it took a while to type, so please do not copy it and take credit for it. Comments & Criticism welcome and encouraged, I would hope to discuss this further.
