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| Description: This giant refracting telescope, built in the late 1800s, is housed at Yerkes Observatory near Chicago. The objective lens is 102 cm (40 in.) in diameter, and the telescope tube is 19 ⅓ m (63 ½ ft) long. (Yerkes Observatory) Picture Stats: Views: 805 Filesize: 316.49kB Height: 900 Width: 769 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=15892 |