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So the sun, sitting in truth as on a royal throne, governs the family of stars that makes him the crown

begin to think of the Earth in the Universe.
We have always said that the Earth is spherical . But that evidence
I? We have the pictures taken by astronauts during space missions.
But the ancients? All believed that the Earth was flat?
No! But how could they prove the sphericity? They had noticed that
:
- when a ship is close to the port before you see the tree, then the castle and finally the hull, and the reverse happens when it leaves the port;



- other solar system bodies seem to form a sphere; isolated in space. By analogy this should also apply to the Earth
- at the same time day or night the sky looks different to observers placed at different places of the Earth
- for an observer who climbs a mountain along the sides of the horizon while being circulated, and extended himself as they increase the quota. Among the infinite geometric figures only the sphere has the property to appear circular from anywhere you look.



- the Earth's shadow on the surface of the Moon during the lunar eclipse is always circular. We did a

experiment taking a coin and a ball. We have projected the shadow on the cabinet by changing the direction of light rays. Varied as the shadow?