01:750:109 Lecture Notes - Lecture 1: Coma Supercluster, Andromeda Galaxy, Virgo Supercluster
19 Oct 2018
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Document Summary
One planet in a star system, orbiting a star, in the milky way, with 20 or 40 different galaxies. Andromeda is the only one as big as the milky way (the rest are small), in a supercluster. Galaxies arrange themselves in filament structures enclosing relatively empty spaces. Power of progression: zoom out so field of view increases by factor of ten. Zoom out - see a bigger part. (info increases each time) meter to 10 meters to 100 meters to a kilometer, to 10 kilometers. Meters are a good standard of measure for earth. North pole and south pole exactly 100, 000 kilometers apart - how meter was created by french. Au - astronomical unit (150 million kilometers - distance from earth to sun) Distance between planets much smaller than the distance between stars. Distance between stars much larger than the size of the stars. (a few aus vs. more than 4 light years)
