Solar eclipse

Solar eclipse

Fig. 5.5 . During a solar eclipse, the Moon casts its shadow upon the Earth. No portion of the Sunís photosphere can be seen from the umbra region of the Moonís shadow (small gray spot); but the Sunís light is only partially blocked in the penumbra region (larger half circle). A total solar eclipse, observable only from the umbra region, traces a narrow path across the Earthís surface.

Copyright 2010, Professor Kenneth R. Lang, Tufts University