In the equatorial coordinate system, the position of the celestial body is represented according to the specified latitude and longitude, referred to as a red river (α), and deficit / 赤 (δ). The equatorial and Earth's publicly track surface is also the zodiac, and there is a angle between 23 ° between the two (astronomical "is called" Yellow Docation "). In this way, the daytime is two intersections, and the two intersections are fixed in the air. The zodiac from the East, from the intensive point to the north of the equator, in the astronomy, called "Spring Point". We set the wires through this point as 0 ° of the equals equatorial coordinate system. Unlike the earth's degree, the red is not divided into east, Western, it is from 0 ° to the west to 360 °. Moreover, its unit is still not "degrees", but time, minutes, seconds, the range is 0 ~ 24. The latitude specification of the equler equatorial coordinate system is similar to the global latitude. It is just not called "South Laun" and "North Lay", and Ning Naki is positive, the south is negative.
