This site, created by Fred Espenak of the National Aeronautics and Space Administration (NASA) looks at solar eclipses, lunar eclipses, planetary transits, and moon phases. This site tells you about past occurrences of these phenomenon and future ones. The page features historic data from around the turn of the 20th century onward. It also features sky calendars for each month up to 2020. This is a great repository of information for everything involving eclipses. The information is well organized and can be easily navigated.
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