How big is our Universe..???



Imaginary tour of Universe



How big is the universe..? that is the question a man has been asking since the beginning of the time. Let's take a imaginary tour of universe. 



Imagine if we travel at the speed of light departing from our own star sun on a trip across the Cosmos on 1st January midnight. Let's imagine if we are travelling at the speed of 186000 mile per second we just quickly pass the orbit of Mercury then Venus and span of 93 million miles that separate the Earth from the Sun in just 8 minutes 19 second. We continue on passing Mars then the gas Giant planet Jupitor, Saturn, Uranus, Neptune. Finally after 5 hours 31 minutes we passed the Pluto and companion moon. Our journey has taken us over 3.5 billion miles to the outer limits of our solar system, it's still January 1st.


Now we travel in the direction perpendicular to our Galaxy, behind us 9 planet and Sun quickly vanished the emptiness of space has broken only by the light of stars so distant that they don't yet appear to move. A year passes, then 2 years, 3 years, 4 years, finally on April 19th of the 5th year we reach Alpha Centauri A, the nearest star to our solar system.



We have travelled more than 25 trillions miles and our journey has scarcely begun...
When we are 10 light years from the Sun, far enough out in a space that the stars in our galaxy appears to converge. In 100 light years from the sun gas and nebulous material from the arms of the Milky Way fill our view. In 1000 light years the galaxy's arms and disks become more defined. Yet it's not untill we have travelled at the speed of light for 100000 years that the entire Spiral of Milky Way is recognised. From here on each point of light we see is no longer as individual star but an entire Galaxy. 


If you add 22 zeros behind 10 and whatever figure it is, there are approx, that many stars in each Galaxy. 5 million years after, the Milky Way seems the part of the 30 galaxies cluster known as local group. 50 million light years out we encountered the large burger cluster containing more than 2000 galaxies, and so it goes as our travel continues to take us deeper into the Cosmos. 


Finally after 10 billion years past we decelerate and pause to observe a theoretical view of the universe. Now we can see countless billions of galaxies are no more than a micro dot here (as many as 10 rest to 20 galaxies), it's a spectacular. So vast and divers its designs that the power of its creator must truly surpasses human understandings.



The Creator of this Universe how Powerful..! Creative and Extraordinary He would be... That is the question we must ask ourself... That He has created such a beautiful World.



                               Writer :  Dhiman Das

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