What do you know about constellations?

In order to identify the stars easily, the ancients divided the celestial sphere into many regions called constellations, with a total of 88 constellations. Each constellation can be identified by the special distribution of bright stars in it. Their boundary is roughly an arc parallel to and perpendicular to the celestial equator.

Babylonians observed these constellations for a long time, determined the ecliptic through observation, and divided the ecliptic into 12 equal parts, each equal part was 30 degrees, which was called 1 segment. The sun travels around the ecliptic in 12 months/cycle, so it travels on the ecliptic every month 1 segment. In the eyes of the ancients, the sun was Apollo, and its resting place must be a magnificent palace. Therefore, they called the 1 section of the ecliptic 1 palace. In this way, the section 12 on the ecliptic becomes the "zodiac".

The names of the zodiac signs are the same as those of the 12 constellation near the ecliptic, namely Aries, Taurus, Gemini, Cancer, Lion, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius and Pisces. But they are fundamentally different. The zodiac indicates the position of the sun on the ecliptic. Every house is 30 degrees, and the time when the sun enters every house is basically fixed. But the size of constellation 12 is different. For example, the width of Pisces is 49 degrees, while the width of Cancer is only 2 1 degree. 12 constellation is not necessarily located on the ecliptic, but distributed within 8 degrees on both sides of the ecliptic.