In history, we have learned much about the Sun, Moon, and Earth from careful observation of them. In fact, perhaps the first use of the scientific method dates back to Aristotle's observations of lunar eclipses.
Lets look at how eclipses have enriched our knowledge as well as thrilled our senses, especially total solar eclipses, such as coming to the United States on August 21, 2017.
Eclipses are rare events, because the geometry you explored in this interactive must be just right. Lets compare the two types of solar eclipses, for instance.
Let's use the geometry again, to explore the duration of a total solar eclipse under the best of conditions.