How is the constellation determined?

Western constellations originated in ancient Greece, and the earliest mention of constellations was in a poem Phaenomena written by the Greek poet Aratus in 270 BC. As can be seen from this poem, the word constellation was known to mankind before Aratus. Aquarius 65438+1October 20th-February 18

Pisces February 65438+March 20th, 2009

Aries March 21-April 19

Taurus April 20-May 20

Gemini may 2 1- June 2 1

Cancer June 22-July 22

Leo July 23-August 22

Virgo August 23-September 22

Libra September 23rd-65438+1October 23rd.

Scorpio 65438+1October 24th-165438+1October 2nd1.

Sagittarius165438+1October 22nd-65438+February 2nd1.

Capricorn 65438+February 22 -65438+ 10/9