Constellation: Difference between revisions

The Zodiac is a ring of constellations that is directly in line with where the sun "passes" over the earth during the year. Or more accurately, where the earth rotates so that it ''appears'' that the sun is moving, when really it is the earth ''orbiting''. This band is broken up into twelve parts, which are visible at different times throughout the year. Each Zodiac is 30⁰ of spherical rotation throughout the year. So all twelve of them put together make up one year, with a different Zodiac for each month. For this reason, they were used in ancient times as a sort of calendar to keep track of the months. Especially in more mild climates where the summers and winters are hardly distinguishable.