1. About Black hole
By Kota Katsunuma

2. What are black holes ?
Scientists think a black hole form when a supergiant star Colipases form the force of its own gravity. It leaves

3. John Archibald Wheeler
Who Is said black hole ?
John Archibald Wheeler 
He is American scientist

4. How many kinds of black hole ?
Stellar black hole
supermassive black hole
Miniature black hole

5. Stellar black hole
Stellar black hole, with masses less than about 100 times that of the sun, comprise one of the possible evolutionary, endpoints, of high mass stars.

6. supermassive black hole
Supermassive black holes, which can have a mass equivalent to billions of suns, likely exist in the centers of most galaxies, including our own galaxy, the Milky Way.

7. Miniature black hole
miniature black hole, which would have a mass much smaller than that of our Sun. But it's possible that miniature black holes could have formed shortly after the "Big Bang," which is thought to have started the universe 13.7 billion years ago.

8. url
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