Answer:
Constellation is a formation of stars.
Step-by-step explanation:
A constellation is a formation of stars making an imaginary pattern in space. According to history, these formations are representations of ancient gods and as such named after ancient gods mostly of the Greek or Egyptian myths. In modern times, Scientists name constellations after instruments or animals. 
The most common use of the constellations is the zodiac sign which represents the Gregorian 12 calendar months of the year. 
January - Capricorn 
February - Aquarius 
March - Pisces 
April - Aries 
May - Taurus 
June - Gemini 
July - Cancer 
August - Leo 
September - Virgo 
October - Libra 
November - Scorpio 
December - Sagittarius 
Constellations also have spiritual meanings in relation with the zodiac signs to predict the nature of an individual according to the time of birth.