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Thursday, April 21, 2011
1.35 Recall that the solar system is part of the Milky Way galaxy: describe a galaxy as a large collection of billions of stars, state that the universe is a large collection of billions of galaxies
What is a GALAXY?
Which galaxy are we in?
Source an image of our galaxy
Source:
http://www.atlasoftheuniverse.com/galaxy.gif
What type of galaxy are we in?
How many galaxies are there is the Universe?
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