A constellation is an area on the celestial sphere in which a group of visible stars forms a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object.
The relationship of the Earth's tilt to the Sun's apparent path governs how the zodiac will be orientated overnight.
Babylonian tablet recording Halley's Comet in 164 BC
Egyptian star chart and decanal clock, from the ceiling of Senenmut's tomb, c. 1473 BC
The Milky Way as seen from Earth, with prominent dark features labeled in white, as well as prominent star clouds labeled in black. Below center left are the Large and Small Magellanic Clouds. The star-like objects are globular clusters of the Milky Way.
The zodiac is a belt-shaped region of the sky that extends approximately 8° north and south celestial latitude of the ecliptic – the apparent path of the Sun across the celestial sphere over the cours
Constellation
…Naming constellations also helped astronomers and navigators identify stars more easily. Twelve (or thirteen) ancient constellations belong to the zodiac (straddling the ecliptic, which the Sun, Moon, and planets all traverse). The origins of the zodiac remain historically uncertain; its astrological…
The Earth's orbit around the Sun causes the apparent motion of the latter along the ecliptic (red). Earth is axially tilted 23.4° relative to this plane; its equator, extended to the stars, is shown in light blue.
Astrophotos of the twelve zodiac constellations
Roman Egyptian coin of Antoninus Pius (dated year 8 of his reign or 145 AD) showing his portrait and a Zodiac wheel with the busts of Helios and Selene in the center
A sixth-century mosaic zodiac wheel in synagogue Beth Alpha incorporating Greek-Byzantine elements, Israel