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| Description: The Universe Distances to the stars are very large Units of measurement Kilometers or astronomical units are too cumbersome to use Light-year is used most often Distance that light travels in 1 year One light-year is 9.5 trillion kilometers (5.8 trillion miles) Other methods for measuring distance are also used Interstellar Matter Between the stars is “the vacuum of space” Nebula Cloud of dust and gases Picture Stats: Views: 251 Filesize: 2.69MB Height: 918 Width: 1271 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=39662 |