Transcription of Galaxies through Space and Time
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Galaxies through Space and Time2 ContentsINTRODUCTION 4 About the Hubble Space Telescope 5 Our Understanding of Galaxies : A Timeline 7 CHAPTER 1: Our Galactic Neighborhood 10 Seeking the Source of Falling Gas ..12 Studying Ancient Stars in the Milky Way ..14 Tracing the Origin of an Intergalactic Cloud ..16 Surveying Star Clusters in the Andromeda Galaxy ..17 Measuring a Giant Halo around the Andromeda Galaxy ..19 CHAPTER 2: Intriguing Galaxies across the Universe 20 Excavating a Prehistoric Galaxy in Our Cosmic Backyard.
French comet-hunter Charles Messier publishes the first version of his catalog of non-stellar objects, which eventually includes over three dozen galaxies even though he has no idea of their nature or great distances. 1845 William Parsons, Ireland’s third Earl of Rosse, uses the world’s largest telescope of the time
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