Knowledge World !!!

The Universe 

No one knows the exact number of galaxies in the universe, but it is estimated that there are more than 50 billion galaxies inthe universe!(How huge the universe is!!!)

The matter in the universe is so thinly dispersed that the universe can be compared with a building twenty miles long, twenty miles wide, and twenty miles high, containing only a single grain of sand.

While astronomers used to believe that galaxies were distributed more or less evenly through space, they have now found regions where galaxies are rare or absent. The largest of these regions is located in the direction of the constellation Bootes, and measures more than 300 million light years across.