Black Holes

Where do we observe black holes

Supermassive black holes are a million to billion times bigger then are sun and are found in centers of galaxies . Most galaxies and maybe all of them harbor such a black hole. So in our region of the universe there are some 100 billion supermassive black holes. The nearest one is in the center of the milky way galaxy 28 thousand light-years away. The most distant one that we know of lives in a quasar galaxy billions of light-years away.

How do black holes form

When a large star runs out of fuel it can no longer support its own weight. The pressure from the star's massive layer of hydrogen press down forcing the star to get smaller and smaller and smaller. Eventually the star will get even smaller than an atom.
Black Holes
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Features of a black hole

Black holes are made up of 3 main parts. The outer layer of a black hole is called the outer event horizon. Within the outer event horizon you would still be able to escape from a black holes gravity because the gravity is very weak. The middle layer of a black hole is called inner event horizon. If you didn't escape the black holes gravity before you entered the inner event horizon then you have missed you chance to escape. The gravity in this layer is much stronger and it does not let go of objects it captures. At this point you would begin to fall towards the center of the black hole. The center of the black hole is called the singularity. The singularity is where the black holes gravity is the strongest.

How astronomers find black hole

Black holes do not emit any detectable type of light. However astronomers can find black holes by measuring the visible light, X-rays and radio waves emitted by material around the environment of black holes. For example when a normal star orbits a black hole we can measure the speed of the star by studying the visible light that it emits. Knowledge of this speed can be combined with the law of gravity to prove that the star is orbiting a black hole.
Space School- Strange Things In Space

Who discovered black holes

The concept of black holes was first conceived by an amateur astronomer named John Michell in 1783. He was laboring under the Newtonian that light particles had mass. So, using Newton’s equation for gravity. Michell suggested that if there were an object with 500 times the radius of the sun but with the sun’s average density, then its escape velocity would be faster than the speed of light. A few years later the French mathematician and astronomer Simon Pierre Laplace came to a similar conclusion.

The reason that black holes interest me

The reason that black holes interest me is because they come form dead star and it is strong enough that light cant escape it.
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Intersting facts about black holes

Black holes evaporate overtime This surprising discovery was first predicted by Stephen Hawking in 1974. The phenomenon is called Hawking radiation after the famous physicist. Hawking radiation disperses a black hole's mass into space and over time will actually do this until there is nothing left, essentially killing the black holes. This is why Hawking radiation is also known as black hole evaporation.


Black holes could create new universes

It might sound crazy that black holes could create new universes. especially since we're not sure other universes exist but the theory behind this is an active field of research today. A very simplified version of how this works is that our universe today, when you look at the numbers, has some extremely convenient conditions that came together to create life. If you tweaked these conditions by even a miniscule amount, then we wouldn't be here. The singularity at the center of black holes breaks down our standard laws of physics and could in theory, change these conditions and spawn a new, slightly altered universe.

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