Back Tétrade lunaire French Tetrad (fenomena astronomi) ID 사분식 Korean Tétrade lunar Portuguese Tetradă lunară Romanian நிலவு மறைப்பு நாற்தொடர் Tamil
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In astronomy, a tetrad is a set of four total lunar eclipses within two consecutive years.[1]
The frequency of tetrads varies by century with the frequency of total lunar eclipses. This repeating cycle is called a tetradia. See Eclipse cycle for more information.