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Unformatted text preview: AST201 May 17, 2011 Lecture 1- Tutorial: Tuesdays HA 401 Where are we?- Our Address: Earth, Solar System, Milky Way Galazyt, Local Group, Local Supercluster, Universe Relative Sizes of Objects in the Solar System:- Terrestrial Planets (made of rocks) Earth, Venus, Mars, Mercury- Jupiter, Saturn, Uranus, Neptune- Jupiter is 10 times in diameter of Earths Relative Size of Stars:- Sun is 100 times in diameter of Earths- Antares, Betageuse- Sun is low mass small star Relative Sizes of Galaxies:- Milky Way is midsized Galaxy- Andromeda, slightly bigger, is our neighbor- Virgo A is extremely huge- Whirlpool Galaxy, Themglum Galaxy, Nebeula Minor Relative Distances:- Galaxies are relatively close to each other, Stars are relatively far for their size and therefore galaxies often collide Common Distance Units Used in Astronomy:- 1 AU = average distance between the Earth and Sun (used within the Solar System)- 1 ly = distance light travels in 1 year (used to describe within the Milky Way...
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This note was uploaded on 06/23/2011 for the course AST 201 taught by Professor Abraham during the Summer '08 term at University of Toronto- Toronto.
- Summer '08
- Solar System