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| Description: Hubble’s Tuning Fork Diagram Hubble summarized his classification scheme for galaxies with this tuning fork diagram. Elliptical galaxies are classified by how oval they appear, whereas spirals and barred spirals are classified by the size of their central bulges and the correlated winding of their spiral arms. An S0 or SB0 galaxy, also called a lenticular galaxy, is an intermediate type between ellipticals and spirals. It has a disk but no spiral arms. Picture Stats: Views: 652 Filesize: 188.41kB Height: 868 Width: 1350 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=18723 |