The hole is perfectly spherical and has only three attributes: it's mass, it's spin, and it's electric charge. After a black hole is created, the gravitational force continues to pull in space debris and other type of matters to help add to the mass of the core, making the hold stronger and more powerful. Most black holes tend to be in a consistent spinning motion. This motion absorbs various matter and spins it within the ring that is formed around the black hole. This ring is known as the "Event Horizon." This event horizon is the point where the black hole's gravitational pull begins. Once you cross the event horizon, there is no turning back. If an object were to approach the event horizon, time would slow down to the point in which it would take an infinite amount of time to reach the black hole. The first to really take an in depth look at black holes and the collapsing of stars, were a professor, Robert Oppenheimer and his student Hartland Snyder, in the early nineteen hundreds. They concluded on the basis of Einstein's theory of relativity that if the speed of light was the utmost speed over any massive object, then nothing could escape a black hole once in its clutches. The name "black hole" was named such, because of the fact that light could not escape from the gravitational pull from the core, thus making the black hole impossible for humans to see without using technological advancements for measuring such things like radiation. The second part of the word was named "hole" due to the fact that the actual hole is where everything is absorbed and where the center core presides. Suppose that you are standing on the surface of a planet. You throw a rock straight up into the air. If you threw the rock hard enough you could make it escape the planet gravity entirely. It would keep on rising forever. The velocity you need to break through or away from a gravitational pull is called the "escape velocity.
