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Cosmos vs Astronomy

 Cosmos

Cosmos means every thing which is around us. It is pretty big. Cosmos is originally a Greek word , meaning both "order" and "world" , because the ancient Greeks thought that the world was perfectly harmonious and impeccably put in order.

Astronomy 

Astronomy is a natural science that studies about celestial objects and phenomenon. It uses mathematics, physics and chemistry in order to explain their origin and evolution. The objects of interest include planets, stars, solar systems, nebulae, black holes, and many other things.
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