52.The Solar System.
The solar system the people of the past were suffering from a great want to trace the the origin of the sun and other planets around . although they have been trying their level best ever since people have not been able to disclose this mystery yet.
The solar system is a family of planets including our earth .it is headed by the it was Copernicus who proved that the other planets such as mercury Venus earth mars Jupiter Saturn Uranus Neptune and Pluto rotate around the sun they do so along an oval like track .
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