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| Description: Galaxies with Rings (a) A composite image of the Cartwheel Galaxy. This ring-shaped assemblage 500 million ly from Earth is likely the result of one galaxy, probably the blue-white one below it at the eight o’clock position, having passed through the middle of the larger one. Astronomers suspect that the passage created a circular density wave in the Cartwheel that stimulated a burst of star formation, creating many bright blue and white stars. Ultraviolet is in blue, visible light in green, infrared in red, and X ray in violet Picture Stats: Views: 577 Filesize: 160.97kB Height: 900 Width: 731 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=18731 |