Encyclopediaumbra:umbra: see eclipse; sunspots. The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2007, Columbia University Press. All rights reserved. More on umbra from Fact Monster:
- sunspots - sunspots sunspots, dark, usually irregularly shaped spots on the sun's surface that are ...
- eclipse - eclipse eclipse [Gr.,=failing], in astronomy, partial or total obscuring of one celestial body by ...
- eclipse: Lunar Eclipses - Lunar Eclipses Since the earth and moon shine only by the reflected light of the sun, each casts a ...
- Georg Heym - Heym, Georg Heym, Georg , 1887–1912, German poet and novelist of early expressionism. ...
- eclipse: Solar Eclipses - Solar Eclipses A total solar eclipse can occur only when the moon is in its new phase. At this time ...
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