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Synopsis :

The word “galaxy” is derived from the Greek word galaxias which means "milky", a reference to our very own Milky Way. However, there is much more to them. Galaxies range in size from dwarfs with few billion stars to giants with one hundred trillion stars. Most galaxies are gravitationally organized into associations known as galaxy groups, clusters, and super clusters. Find out more in this one hour special and discover the different types of fascinating Galaxies in our Universe.