'Many astronomers' presentation slideshows

The Milky Way

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Study Notes for Chapter 30:

Study Notes for Chapter 30:. Stars, Galaxies, and the Universe. 1. A galaxy is made of stars, dust, and gas bound together by ______. gravity. 2. A large, bright star whose hot core has used most of its hydrogen is a _____. giant. 3. A light-year is the distance ____ travels in a year.

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Sentence variety

Sentence variety. Vary sentence length. Sentences average between 15 and 25 words, but you want variety. Make some very short (under 10 words) Make some very long (about 40 words). Problem: Short sentences. If most of your sentences are short (10-15 words or less):

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