COSMOLOGY

What is the shape of universe ? Sometimes when you sit quietly somewhere you got stuck by some really surprising questions.So today when i was taking a cup of tea and enjoying the nature i found that everything i am looking around me having a shape.Everything is having a height ,length and width.I started to think about the space i mean (it's a little silly)i have always been wondered if earth is in space floating under the gravity or moving in a path made by mass of the sun,than what is above and down the earth.Is there any above and down of earth i mean if its is space then where space is floating in.What is the shape of universe is it finite or infinite . HOW UNIVERSE IS MADE/CREATED/OCCURRED IT SELF ? So far the big bang theory is the only theory that is satisfying all the needs that can explain how the universe created. Before the big bang there was no time .The big bang created all the matter and stuffs in a fraction of sec and from the very beginning it has been exp...

First let us know what is black hole  A black-hole is a highly dense thing in space which has a massive gravitation pull that even light can not escape from its gravity.its a distortion in space time curvature  where gravity pulls so much that even light can not get out  . As black holes have massive mass it have mssive gravity.To become a black hole it needs two main factor first chandrasekhar limit and the second one is Schwarzschild radius What is chandrasekhar limit The  Chandrasekhar limit  ( / tʃ ʌ n d r ə ˈ s eɪ k ər / ) is the maximum mass of a  stable   white dwarf   star . The currently accepted value of the Chandrasekhar limit is about 1.4  M ☉  ( 2.765 × 10 30  kg ).exceeding chandrasekhar limit a star undegoes formation ofblack hole.by chandrasekhar limit theory our own sun even cant become a black hole. So to convert  earth a black hole it needs more mass. What is Schwarzschild radius  The...