Video Link: https://www.youtube.com/watch?v=RABrgTLU0JE

Absolute Equatorial Coordinates english version
Video explanation of the realization of coordinate measurements in astronomy. Thanks to Heraldo Soares de Oliveira (Brazil) for their help in translating subtitles in Portuguese. For comments and suggestions (errors in the translation of subtitles, for example), type your comments on this page. Thank you. http://www.pawean.com The coordinates measured from the plane of Equator, are called Absolute Equatorial coordinates. The reference plane is the plane of Equator and the starting point or reference to start measuring is the Aries point or Vernal point. Aries point is the position of the center of the sun when it passes through Equator, ie when its declination is 0, and it changes from negative to positive. This position is given on March 21, the day of early spring. We know that the sun crosses the ecliptic circle apparent for a year. The March 21 crosses the Equator from a negative declination to a positive declination, ie passes the southern hemisphere to the northern hemisphere. It is the spring equinox. On September 23 the route is reversed, the declination goes north to south. It is the autumn equinox. These days are called equinoxes because the nights are the same length as the day. Aries point is taken as a starting point, but not fixed, because it moves slowly because it will affect two movements: the precession of the equinoxes, very slow and the nutation of a regular basis. Aries Point 2000 years ago coincided with the position of the Sun in the constellation Aries ...From:Antonio Gonzlez EstvezViews:0 0ratingsTime:08:37More inScience Technology

Go here to see the original:

Absolute Equatorial Coordinates english version - Video