Today
What do we observe in the sky?
Sun, Moon, Stars, Planets
Ancient Observations - which are still useful!
Ancient Cosmologies - facts or invention?
- Problem of the Planets (Wanderers)
- The strange motion of the planets has led to two competing world views
- Astronomy searches for explanations in simple laws - leads to new science
- Astrology treats the motion as somehow related to life on earth - leads to fortune telling, horoscopes, ….