ancient greek ideas about the solar system

People are interesting to know how the world is discovered and how it works, when the people where born and who is the first birth. For this questions answer is "Ancient Greek". Greeks where the first people to examine about the world. They discovered about the ideas on solar system. Later other peoples of roman, medieval Europeans and Arabs enlarged and followed the ideas of the ancient Greek. First Greek philosopher is "Thales" between 624-546 B.C. He was the first person to ask for what the Universe is made, during that no one knows about the gods and demons.

Later Greek philosopher made a list of  "seven wise men", Abaxinabder was the first person who realized why the earth the earth is in round shape why not in flat shape. He also suggested that earth has a cylindrical shape. In sixth century B.C., a tunnel was dug on the Aegean island of samos under the control of Greeks. Tunnel's two ends met couple of time and it a stunning achievement during that period.