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ASTRONOMY: What does it mean when the moon is a quadrature?
I'm doing an astronomy assignment and it keeps referring to the moon being at quadrature. What does this mean?
Answer: In astronomy, quadrature occurs when two celestial bodies appear 90° apart from one another as viewed from a third celestial body. As an example, the Moon and the Sun are in quadrature with respect to the Earth when the Moon is in its exact first quarter or last quarter phases. The symbol for astronomical quadrature is a hollow square
