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| Description: Compression Wave in Traffic Flow When normal traffic flow is slowed down, cars bunch together. In a grand-design galaxy, a density wave moves through the stars and gas. The wave is merely a region of slightly denser matter, which, in turn, creates more gravitational force. This force compresses the gas and enhances star formation, which highlights the spiral density wave Picture Stats: Views: 1029 Filesize: 322.85kB Height: 675 Width: 1350 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=18712 |