Astronomy 1021 Chapter 2: Astronomy 1021: Chapter 2.4

• School: Western University
• Department: Astronomy
• Course: Astronomy 1021
• Professor: Robert Cockcroft

Document Summary

Astronomy 1021 chapter 2 reading notes: discover the universe for yourself. Chapter 2. 4: the ancient mystery of the planets. Why was planetary motion so hard to explain: planets do not move along the sky in an easy to see path, rather, they can move east and west through constellations. Stellar parallax: the apparent shift in position of a nearby star (relative to distant objects) that occurs as we view the star from different positions in the earth"s orbit of the sun every year. The greeks thought the earth was at the center of the universe because they did not imagine that stars could be so far away. 5 planets that we can see with the naked eye: jupiter, saturn, mercury, venus, and.