We explore the incredible geometry behind total and annular solar eclipses.
crosses the ecliptic it causes a solar eclipse, which it can do during every year's two eclipse seasons.
This inner shadow is narrow, cone-shaped and projected as a path across Earth in addition to the penumbra. That path moves across Earth's surface from west to east because the moon orbits west to east. During a total solar eclipse, the tip of that cone touches Earth and is called the umbra. It's also why eclipse-chasers are sometimes called umbraphiles, according to
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