tag:blogger.com,1999:blog-1962710819651351653.post6852538183307153441..comments2023-09-04T06:34:17.760-06:00Comments on Franklin Chronicle: Art for Art's Sake: GizmoThe Franklin Familyhttp://www.blogger.com/profile/05862004696538769633noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-1962710819651351653.post-1499780321340056742007-09-26T12:09:00.000-06:002007-09-26T12:09:00.000-06:00An umbra is the fully dark part of a shadow, as op...An umbra is the fully dark part of a shadow, as opposed to the partly dark part, the penumbra. It's mostly used to describe lunar eclipses.David Groverhttps://www.blogger.com/profile/17200717518145919923noreply@blogger.com