Astronomy 1021 Lecture Notes - Lecture 2: Tidal Locking, Apsis, Retrograde And Prograde Motion

• School: Western University
• Department: Astronomy
• Course: Astronomy 1021
• Professor: Chris Racknor

Document Summary

Astronomy notes chapter 2: discovering the universe for yourself. A region of the sky with well-deined borders; the familiar paterns of stars merely help us locate these constellaions. Stars in a constellaion appear close together but in reality may be very diferent distances from. Illusion is caused by our lack of depth percepion when we look into space. Greeks did not understand and thought everything rested on a celesial sphere that surrounded the earth. Useful anyway as we can map the sky as seen from earth. It crosses the celesial equator at a 23. 5 angle, because that is the ilt of. The band of light we call the milky way wraps all the way around the earth"s celesial sphere. Important relaionship to the milky way galaxy: it traces our galaxy"s disk of stars-the galacic plane- as it appears from our locaion within the galaxy.