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Saturday, August 4, 2018

BLACK HOLES

Blackholes
So first have a look at how does a black hole looks like  :-                                                                        

                                            Birth of a black hole

It just starts when a massive star runs out of fuel and due to massive size resulting into uneven or we can say heavy gravitational pull of the metallic core of the star it just collapse into the core due to large graviational pull of the core .. if the size of the star is large enough to take the density of the collapsed star upto damn high it just form dense ball like structure with a density of like earth collapsed into egg




Why can't we see a black hole



  1. Well we can't clearly say that...  but yes they are not visible still their presence can be easily identified.
    1. By gravitational lensing
    2. Gamma ray brusts
    3. hawking radiations
  2. So why they are not visible .. simple reason is that they bend space-time way too much that light cant even escape from it thats the only reason why we are still not able to find out what's inside event horizon

What if we accidently fell into a black hole

It could happen to anyone. Maybe you're out trying to find a new habitable planet for the human race, or maybe you're just on a long walk and you slip. Whatever the circumstances, at some point we all find ourselves confronted with the age-old question: what happens when you fall into a black hole?

The outermost boundary of the hole is its event horizon, the point at which the gravitational force precisely counteracts the light's efforts to escape it. Go closer than this, and there's no escape. The event horizon is ablaze with energy. Quantum effects at the edge create streams of hot particles that radiate back out into the universe. This is called Hawking radiation, after the physicist Stephen Hawking, who predicted it. Given enough time, the black hole will radiate away its mass, and vanish. You might expect to get crushed, or maybe torn to pieces. But the reality is stranger than that.

Now Without waiting lets just dive into a blackhole ..near the blackhole you are able feel a small stretch on your body but still you can use you cell phone flash to single ... but by the time reaches near the event horizon .. you got freezed there as the time stops there to the curving of spacetime .. if you wanted to see whats next if you somehow managed to go more deeper then your body will be converted into ashes as soon as you got exposed to blazing hawking radiations

How big Blackholes actually are ?


Black holes can be big or small. Scientists think the smallest black holes are as small as just one atom. These black holes are very tiny but have the mass of a large mountain. Mass is the amount of matter, or "stuff," in an object. Another kind of black hole is called "stellar." Its mass can be up to 20 times more than the mass of the sun. There may be many, many stellar mass black holes in Earth's galaxy. Earth's galaxy is called the Milky Way. The largest black holes are called "supermassive." These black holes have masses that are more than 1 million suns together. Scientists have found proof that every large galaxy contains a supermassive black hole at its center. The supermassive black hole at the center of the Milky Way galaxy is called Sagittarius A. It has a mass equal to about 4 million suns and would fit inside a very large ball that could hold a few million Earths.

Could a Blackhole have sufficient energy to 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, Earth still would not fall in. The black hole would have the same gravity as the sun. Earth and the other planets would orbit the black hole as they orbit the sun now. The sun will never turn into a black hole. The sun is not a big enough star to make a black hole

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