Wednesday 21 May 2014

Universe, A short introduction

What comes to your mind when someone says universe? Vastness of space and time taking you nowhere to the infinity or the very basic fundamental subatomic particle yet unknown to man.
In this article i will give you the most basic idea about the universe, centuries ago man used to wonder how vast the sky is what are these shinning heavenly bodies in the sky?
As the time goes along we have innovated ourselves, invented telescope and figured out that we are not alone in the universes there are other planets circling the sun and the solar system became known to us which is very very vast itself.

Decades later came Sir Edwin Hubble,
This guy changed our perspective about how we used to look at the universe by aiming the powerful new weapon at the sky the mighty hooker telescope (2,500mm). Hubble saw that small patches of blurry sky are not gas clusters but the entire galaxies which can carry billion of starts















Above is the image of Andromeda galaxy, the closest galaxy to earth has about 1 Trillion Stars
and  it is 2538,000 light years away.




300 to 400 billion are the estimated number of stars in our own milky way galaxy, our Sun is one of them. Unfortunately its seems like we will never going to see the picture of milky way in this life because we live inside it and the edge of the galaxy is estimated to be 25,000 light years away.




















Suppose this spiral galaxy illustrated above is milky way then our solar system is some where around near the arrow pointer. The closest star to earth beside our own sun is about 24,000,000,000,000 miles away, and there are about 300 to 400 billion stars in our galaxy.

What is a light year?
Traveling with the speed of light for exactly about one year. the total distance covered will be measured as 1 light year, this makes exactly 5865,696,000,000 miles that's a long way to go.

The universe is filled with not thousands but about one hundred and fifty billion galaxies just talking about facts Hubble also discovered these galaxies are moving further apart from each other and according to modern science, the universe is still expanding and expanding to the infinity, that makes me wonder how vast the universe is and who knows if this is the only universe that exists or if there is a whole range of multiverse, beside many physicists believes in multiverse theory.

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