In this episode Sagan start by addressing the drastic differences between astronomy and astrology. He then goes into the historic divide between the heliocentric and geocentric models of the universe. The most popular geocentric model was proposed by Ptolemy and was the reigning model of the universe until Nicholas Copernicus came along and proposed the …
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Episode 2
This episode was centered on the ideas of natural selection and how the universe evolved. Sagan spends some time addressing the idea of intelligent design and then goes on the explain some of the likely cases for extraterrestrial life. I thought it was interesting how he laid out the potential criteria for a planet, or …
Episode 1
Episode 1 was kind of like a general overview of many different aspects of our universe. I really liked the use of the dandelion seed as an analogy of a spaceship. I also enjoyed how they showed that Eratosthenes calculated the circumference of the earth over 2,000 years ago. Last, i liked how they broke …
Who am I?
Hi! My name is Isaac Ingalls and i’m in astronomy 109. I come from Parker Colorado, a small town located about 45 minutes south of Denver, and I lived there with my family until moving to Greely to go to school. I have always had a casual fascination with astronomy and have always wanted to …
Astronomy 109 Blog 