BLACK HOLES AND STEPHAN HAWKİNG

Hello ! I am going to talk about black holes and Stephan Hawking.

What Is a Black Hole?

A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying. Because no light can get out, people can't see black holes. With specials telescopes and tools can help us to see black holes.

 

How Big Are Black Holes?

Black holes can be big or small. Scientists think the smallest black holes are as small as just one atom. Black holes are very tiny but they have a mass as a mountain or hundreds of time sun. The mass is the amount of matter. The black hole is also called by ''stellar''. In Milky Way ,Earth's galaxy,there are lot of stellars.

The largest black holes are called "Suppermasive". These black hole's masses more than 1 million suns together. The scientists know that all galaxies have a suppermasive in their center. In Milky Way center we have suppermasive called "Sagittarius A". 

People think wrongly about black holes. They think black holes are deathly you can`t escape a black hole but in black hole's center you split your atoms. If you are caught by a black hole first your feet are pulled by black hole and you stretch as a spaghetti. That means you are dead but if you get in and get out in a black hole you use a wormhole and you travel back in the time.Thats only a theory. no one sees. It might be true.




How Do Black Holes Form?

Scientists think the smallest black holes formed when the universe began.Stellar black holes are made when the center of a very big star falls in upon itself, or collapses.

After a star death, it causes supernova and creates a black hole. The supernova is an exploding star that blasts part of the star into space.

And scientists think the suppermasive black holes were made at the same time as the galaxy they are in.



Could a Black Hole Destroy Earth?

Black holes do not go around in space eating stars, moons and planets.Earth will not fall into a black hole because no black hole is close enough to the solar system for Earth to do that.
Even if a black hole the same mass as the sun were to take the place of the sun nothing going to be changed without heats. The planets go to orbit the black hole as they orbit the sun.Because gravity of black hole is the same with the sun.

And NASA says : The sun will never turn into a black hole. The sun is not  big enough to make a black hole.

I don`t belive that because all stars are going to explode and they will make a supernova and black hole. It doesn`t have to be big but there will be. If you look at the sun and sun is bigger than normal and more red that means a star doesn`t have to be and the sun is dying and the solarsystem is going to change or might be deleted because of supernova's heat.
And cosmologs are still searching for information about black holes. The physic rules in the black hole are more different than everything  you think.

In a black hole time takes so slowly because there is a bending time  if you get in a black hole. Also, your friends look at you when you get to the event horizon and your friends will not see you because of pulling power. So, if you spend 2 hours in the black hole in real life, you spend billions year. And your friends will not wait for you because they are dead. In addition, if you go to the earth you will not find anything because the sun will explode in 4.5-1.5 billion year.

   WHO IS THIS STEPHAN HAWKİNG?

  Stephan Hawking was born in Oxford / England in 1942. His father Frank was a biologist. Annesi Isobel worked in different jobs.
  Stephan started studying at the age of 11. He then went to Oxford Universitiy College. He was very successful in mathematics and physics.
  Stephan married Jane Wilde in 1965. He had a daughter and two sons. Then, I was infected with ALS. This illness was the beginning of a painful, wheelchair-bound lifestyle, but a happy family life continued.
  The title of Lucasian Professor was given to Hawking at Cambridge University by a title given to Newton and Dirac.
  Hawking was the founder of the Great Union Theory, which was very up-to-date in theoretical physics, trying to explain the four kinds of forces in physics together, and at the same time trying to integrate Einstein's relativity theory with quantum mechanics. Hawking wrote a book called "A Brief History of Time" that almost anyone could understand about cosmology and the universe. The hardest part of scientific writing was that it was a scientific subject written in a way that foreigners could understand. For example, you should not use a formula. Because the formulas scare people who are not accustomed. Hawking said to a friend: "Every formula you put in the book will reduce the number of readers." After a long and meaningful life, he died on March 14, 2018