bn:15450576n
Noun Concept
Categories: Lunar eclipses
EN
tetrad  Lunar tetrad
EN
In astronomy, a tetrad is a set of four total lunar eclipses within two consecutive years. Wikipedia
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astronomy
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EN
In astronomy, a tetrad is a set of four total lunar eclipses within two consecutive years. Wikipedia
An occurrence of 4 total lunar eclipses in a row with intervals of 6 lunations Wikipedia Disambiguation
A set of four total lunar eclipses within two years Wikidata
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