noun
Aries; the Ram
The first sign of the zodiac; used in astrology and astronomy.
彼女の星座は白羊宮です。
Her zodiac sign is Aries.
おひつじ座 is the more common modern Japanese name for the constellation Aries, while 白羊宮 is the traditional astrological term.
From Chinese 白羊宮 (báiyánggōng), literally 'white sheep palace', a calque of Latin Aries.