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The “Nebulae” of the Universe

18 February 2016 No Comment by jawad

Cosmology studies of the universe at large and its size, its shape and its evolution. Seeking to grasp the universe the mind of the cosmologist has  to wander often at distances as great as 10 billion light years  and over time  as long as 10 billion years or  longer.

Until the early part of this century  astronomers thought the universe to be much smaller.

They thought that the in the universe the furthest stars at the edge of our galaxy were about 30,000 light years away and that there  was nothing but dark empty space  beyond the distance. But in  1920’s Edwin Hubble used the 100 inch telescope on Mt wilson to establish that the faint wispy “nebulae” found in all parts of the sky were actually  gigantic conglomeration of stars, similar to own galaxy. But located  at very great distance from us.

He developed methods for  measuring  these enormous  cosmic distances and discovered that some of the remote galaxies were  more than a billion light years  away from us.

Hence when we see a star with our naked eye , we must realize  the point that this faint sparkle has travelled thousands of light years to reach us.

Also one realizes that there are hundreds of thousands of galaxies that yet are to  discovered and explored. And our Hubble telescope brings  us images beyond our imagination. These galaxies are  so huge with billions of stars associated with them. The stars are billions of light years away and you can catch  a glimpse of them through technological ways like the images of the Hubble telescope on the internet.

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