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A star chart drawn 5000 years ago by the Indians in Kashmir, which also depict a supernova for the first time in human history. [7] The Nebra sky disk, a 30 cm wide bronze disk dated to 1600 BC, bears gold symbols generally interpreted as a sun or full moon, a lunar crescent, several stars including the Pleiades cluster and possibly the Milky Way.
The rotation axis of the Earth describes over a period of about 25,800 years a small circle (blue) among the stars, centred on the ecliptic northpole (blue E) and with an angular radius of about 23.4°: the angle known as the obliquity of the ecliptic. The orange axis was the Earth's rotation axis 5000 years ago when it pointed to the star Thuban.
In 2016, the International Astronomical Union (IAU) organized a Working Group on Star Names (WGSN) [2] to catalog and standardize proper names for stars. The WGSN's first bulletin, dated July 2016, [3] included a table of 125 stars comprising the first two batches of names approved by the WGSN (on 30 June and 20 July 2016) together with names of stars adopted by the IAU Executive Committee ...
The IAU defined the constellation boundaries without consideration of astrological purposes. The dates the Sun passes through the 12 astronomical constellations of the ecliptic are listed below, accurate to the year 2011. The dates will progress by an increment of one day every 70.5 years. The corresponding tropical and sidereal dates are given ...
The Sidereal Zodiac is drawn based on the Earth's position in relation to the constellations, and follows their movements in the sky. Due to a phenomenon called precession of the equinoxes (where the Earth's axis slowly rotates like a spinning top in a 25,700-year cycle), there is a slow shift in the correspondence between Earth's seasons (and ...
The equinox was located at the western edge of the constellation Aries when western astrology was codified in the Tetra Biblos, but as a result of the precession of the equinoxes the positions of tropical astrology's zodiacal signs no longer overlap the constellations they were named for, because the starting point of the system of signs at the ...
The zodiacal signs are an abstraction from the physical constellations, and each represent exactly 1 ⁄ 12 th of the full circle, but the time spent by the Sun in each sign varies slightly due to the eccentricity of the Earth's orbit. Sidereal astrology assigns the zodiac sign approximately to the corresponding constellation. This alignment ...
The following lists of constellations are available: IAU designated constellations – a list of the current, or "modern", constellations; Former constellations – a list of former constellations; Chinese constellations – traditional Chinese astronomy constellations; List of Nakshatras – sectors along the Moon's ecliptic