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Lecture 21: 5/2—Galaxies

Some possibly helpful links for this lecture:

SEDS Page on Galaxies
Cambridge Cosmology on Galaxies
Classifying Galaxies
The Milky Way and Other Galaxies
Stars and Galaxies
The Galaxies Web Page
Galaxies Behind the Milky Way
Galaxies Galore, Games and More
A Long Time Ago in a Galaxy Far, Far, Away...
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