Signs of the Zodiac

The signs of the zodiac are a well-known set of names given to $30^\circ$ long segments of the ecliptic circle. Thus, the sign of Aries extends over the range of ecliptic longitudes $0^\circ$-$30^\circ$, the sign of Taurus over the range $30^\circ$-$60^\circ$, and so on. Note that, as a consequence of the precession of the equinoxes, the signs of the zodiac no longer coincide with the constellations of the same name (see Figs. 15 and 16). The 12 zodiacal signs are listed in the table below. It can be seen from the table that ecliptic longitude $72^\circ$ corresponds to the twelfth degree of Gemini, and ecliptic longitude $242^\circ$ to the second degree of Sagittarius, etc.

Sign	Abbr.	Longitude	Sign	Abbr.	Longitude	Sign	Abbr.	Longitude
Aries	AR	$~~0^\circ$-$30^\circ$	Leo	LE	$120^\circ$-$150^\circ$	Sagittarius	SG	$240^\circ$-$270^\circ$
Taurus	TA	$30^\circ$-$60^\circ$	Virgo	VI	$150^\circ$-$180^\circ$	Capricorn	CP	$270^\circ$-$300^\circ$
Gemini	GE	$60^\circ$-$90^\circ$	Libra	LI	$180^\circ$-$210^\circ$	Aquarius	AQ	$300^\circ$-$330^\circ$
Cancer	CN	$90^\circ$-$120^\circ$	Scorpio	SC	$210^\circ$-$240^\circ$	Pisces	PI	$330^\circ$-$360^\circ$