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| Description: (b) Astronomers denote the brightnesses of objects in the sky by their apparent magnitudes. Stars visible to the naked eye have magnitudes between m = –1.44 (Sirius) and about m = +6.0. However, CCD (charge-coupled device) photography through the Hubble Space Telescope or a large Earth-based telescope can reveal stars and other objects nearly as faint as magnitude m = +30. (a: Okiro Fujii, L’Astronomie) Picture Stats: Views: 667 Filesize: 111.39kB Height: 900 Width: 711 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=18380 |