Sidereal and tropical astrology

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What Wikipedia says

In astrology, sidereal and tropical are terms that refer to two different systems of ecliptic coordinates used to divide the ecliptic into twelve "zodiac signs". Each sign is divided into 30 degrees, making a total of 360 degrees.

Excerpt from the Wikipedia article “Sidereal and tropical astrology”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Tomruen, CC BY-SA 4.0, via Wikimedia Commons.