Post History

I haven't studied to much. I don't have any idea of Physics. Last few moments, I was just passing my time by reading theories. I have little bit idea of inflationary theory.

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![History of the universe](https://upload.wikimedia.org/wikipedia/commons/thumb/d/db/History_of_the_Universe.svg/350px-History_of_the_Universe.svg.png)

If you think of a balloon than, if it suddenly burst then, it will spread. Something happened with the Universe. When Bang happened right there. It spreads too faster. Alan Guth had gave the idea of inflationary. The faster expansion of Universe at first moment is known as Inflationary theory. Currently, the universe is expanding also (not for Inflationary theory). It is happening for Dark Energy. Dark energy is pushing "objects" apart. 

$$F=\frac{GMm}{d^2}$$

When distance is increasing Gravitational force is decreasing that's why the expansion "speed" is increasing rapidly day by day.

- Space Expands :

$$ds^2=-(1-\Lambda r^2)dt^2+\frac{1}{1-\Lambda r^2}dr^2+r^2d \Omega^2$$

Equation source [Wikipedia](https://en.wikipedia.org/wiki/Inflation_(cosmology)). 

$s$ is entropy. $\Lambda$ is expansion of Universe. $\Omega$ is free space maybe (I forgot).

You can read about [GR](https://en.wikipedia.org/wiki/General_relativity) for current expansion(which is happening for Dark Energy).