HM stands for various terms. Discover the full forms, meanings, and possible interpretations of HM across different fields and industries.
Full Moon occurring about autumnal equinox As angle between Moon's orbit and ecliptic is very small, Moon rises at same time for several days Can occur only when Moon's ascending node is in Aries, every 18- years (about): 1969 was last occurrence During the Harvest Moon the moon rises as the sun sets and sets as the sun rises
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