<Ul> <Li> The term black moon is not formally established in astronomy and is used at best in the popularization of astronomy . </Li> <Li> There is no single definition of the term black moon . </Li> <Li> The new moon itself cannot be observed . </Li> <Li> The lack of a new or full moon in February can only be assigned to the month, not to any particular date; as such, this is also not observable . </Li> <Li> The event of a black moon is an artefact of how the Gregorian calendar or the seasons map onto lunations . There is no physical or geometric difference between a black moon and other instances of a new moon . </Li> </Ul> <Li> The term black moon is not formally established in astronomy and is used at best in the popularization of astronomy . </Li> <Li> There is no single definition of the term black moon . </Li> <Li> The new moon itself cannot be observed . </Li>

What is the meaning of the black moon
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