What determines when we have an eclipse?

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Video source record: https://images.nasa.gov/details-GSFC_20170614_Eclipse_m12534_Plane

What determines when we have an eclipse?
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Summary

Description Why are eclipses rare? The moon's orbit is tilted. Sometimes the moon's shadow is too high above the Earth. Sometimes it is too low. Other times, it is just right.
Date 2017-06-14
Source images.nasa.gov

Licensing

Public Domain (US Government Work)

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