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13 points
APHELION is validvalid
the point in a planetary orbit farthest from the sun [n APHELIA, APHELIONS] : APHELIAN [adj]
(Greek) the farthest point of a planet's orbit from the sun [n APHELIONS or APHELIA]
the point in a planetary orbit farthest from the sun [n APHELIA, APHELIONS] : APHELIAN [adj]
(Greek) the farthest point of a planet's orbit from the sun [n APHELIONS or APHELIA]