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WATCH: Life Cycle of Stars Review

Sources for images in PowerPoint lecture
http://www.schools.utah.gov/curr/science/core/earth/sciber9/Stand_1/html/2e.htm
http://www.lcsd.gov.hk/CE/Museum/Space/EducationResource/Universe/framed_e/lecture/ch15/ch15_cnt.html
http://hubblesite.org/
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Earth Systems (A)