In astronomy, the point in the sky directly opposite the moon as seen from Earth, similar to how the anti-sun would be opposite the sun.
From anti- (against) + Selene (Greek moon goddess). This technical astronomical term combines the Greek anti- prefix with the classical name for the moon, following the naming convention of terms like 'antisolar point.'
The antiselene is useful for astronomers studying lunar phenomena—when Earth is between the sun and moon at full moon, the antiselene is directly opposite where we see the moon, creating perfect conditions for studying Earth's shadow on the lunar surface.
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