Black Holes
In simplest terms a black hole is an area of space that has so much mass concentrated in it that there is no way for nearby objects to escape its gravitational pull. To understand the magnitude of this gravitational pull we need to explore our best theory of gravity, at the present moment, Einstein's general theory of relativity. His premise states that anything with mass will bend the fabric of space and time. The greater the mass the more distortion in the fabric of the universe. Imagine the universe as a giant rubber sheet with objects, varying in weight, placed upon it, representing planets, asteroids, moons, etc. The objects with greater mass distort the fabric more and hence have a stronger gravitational field. For another object to escape the pull it must achieve something called escape velocity. Escape velocity is the speed you must achieve to get away from a planet and into space. The earth escape velocity is 25,000 mph, while the moon, with a smaller mass, is about 5,300 mph. A black hole has such a large concentration of mass in such a small area that the escape velocity is faster than the speed of light. Then, since nothing travels faster than light, nothing can escape a black holes gravitational field. Even a beam of
Certainly black holes are extremely interesting and cool phenomenon. Therefore when scientists apply these equations to cosmology, they can be confident that their calculations are correct. There are three main categories of black holes, and several sub-categories. So how do you find, or even see, something like this (http://www. So let's suppose that as you are flying in, and your feet are closer to the singularity than your head, your feet would feel the force stronger than your head. In reality scientist work in a much less demanding atmosphere, shaped by observation and consensus. As I stated before a black hole is a mass in space where the gravitational pull is so strong that nothing, not even light can escape. He would only see the last light rays you emitted before crossing the event horizon (http://web. It is important to note that the light doesn't come from the black hole itself, but is created by the energy released by the astronomical speed at which the black hole is moving towards or away from you (http://web. Another, more complicated, method of finding them is called the Shifting. As you get closer and closer the pull on your body becomes stronger and stronger, and eventually, because your feet are being pulled more than your head, you will be ripped apart, to better understand this you can think if how the tides on earth work (http://web. However as you get closer and closer to the singularity you begin to feel a tidal, or tremendous pulling, gravitational force. Indirectly they tell us that Einstein's theory of relativity is, for the most part, correct.
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Acceptance Essays
