VIDEO REVIEW | Solar System Models

The word APPARENT comes from the word APPEAR. APPARENT DAILY MOTION means that the objects in space only appear to move across the sky. What is actually causing them to appear to be moving?

• The Earth's daily rotation.

• The Earth's yearly revolution.

What does the 'geo' in 'geocentric' refer to?

• Geo is short for George

• Geo means 'Earth' as in 'Geology' is the study of the Earth.

What other astronomer supported Copernicus's idea of a sun-centered system? His observations convinced him long before Galileo changed his ideas after his discoveries with the telescope!

• Kepler

• Brahe

Can you think of any reason why it would be useful to predict where planets were going to be at any given time?