The solar eclipse of November 3, 2013, as seen from space.
Meteosat 10 captured the moon’s shadow as it traversed the eastern Atlantic and western Africa (hi-res version). You can see two distinct portions of the eclipse shadow. The dark area in the center is the umbra, where the sun is completely obscured by the passing moon. The intermediate shadow is the penumbra, where the sun is only partially eclipsed, a smoky gradient of fading light reaching out from the umbra. See Wikipedia for more umbrology, and check out Phil Plait’s Bad Astronomy for more eclipse images.