Document Type : Research Paper

Author

Abstract

In the third issue of Sepehr, we presented a discussion about the shape of the Earth and its hypothetical divisions (orbits and meridians), and the importance of each one. Before we go into the discussion of the movements of the Earth, it will not be out of place if we first obtain brief information about the Earth in space, as understanding of many geographic concepts will relate to
this information.
For centuries, man thought that Earth was the center of the universe, but today's man has gained amazing information about the universe. It is now assumed that our Earth is a small planet that moves along eight other planets around the Sun, and the Sun is a star that moves with thousands of other stars in a galaxy among millions of galaxies in an infinite universe.