Week 1

• Greeks


  They are much noted for their contributions in different fields. They were not only great philosophers but great scientists and mathematicians as well
• Ptolemic Model


  It claims that the planets moved in a complicated system of circles
• North star


  Believe to be in a fixed position in the sky. However, when the Greeks traveled to places near the equator like Egypt, it was closer to the horizon.
• Oblate spheroid


  The shape of the earth. It has bulging equator and squeezed poles.
• Eratosthenes


  A greek philosopher who computed the earth's circumference and gave the most accurate size during their time
• Which planets are easily seen in the sky without the aid of telescope

  Mercury venus jupiter saturn