The first point of Aries defines the ecliptic coordinate of (0°, 0°). It is on the celestial equator at both the left and right extremes of the sky chart, with the ecliptic (the orange dotted sine curve) passing through it.
The first point of Aries, also known as the cusp of Aries, is the location of the March equinox (the vernal equinox in the northern hemisphere, and the autumnal equinox in the southern), used as a reference point in celestial coordinate systems. In diagrams using such coordinate systems, it is often indicated with the symbol ♈︎. Named for the constellation of Aries, it is one of the two points on the celestial sphere at which the celestial equator crosses the ecliptic, the other being the first point of Libra, located exactly 180° from it. Due to precession of the equinoxes since the positions were originally named in antiquity, the position of the Sun when at the March equinox is now in Pisces; when it is at the September equinox, it is in Virgo (as of J2000).
Along its yearly path through the zodiac, the Sun meets the celestial equator as it travels from south to north at the first point of Aries, and from north to south at the first point of Libra. The first point of Aries is considered to be the celestial "prime meridian" from which right ascension is calculated.
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They are rarely seen, although were first proposed over 100 years ago. FirstpointofAries and firstpointof Libra: names referring to the astrological...
equinoxes and knew that the firstpointofAries no longer existed in the constellation ofAries. Pico not only knew that the vernal point had shifted back into...
enumerate from the first day of spring, known as the FirstPointofAries, which is the vernal equinox. The astrological signs are Aries, Taurus, Gemini...
defines the starting point for measurement, the first degree of which is historically known as the "firstpointofAries". The first 30° along the ecliptic...
of the year the position on the Earth's surface (in declination and Greenwich hour angle) at which the Sun, Moon, planets, and FirstPointofAries[clarification...
plane crosses the prime hour circle (the hour circle occupied by the FirstPointofAries), also known as the equinox. Fundamental plane Plane (geometry) Reference...
religions. The point where the Sun crosses the celestial equator northwards is called the FirstPointofAries. However, due to the precession of the equinoxes...
plane, and the FirstPointofAries (FPA) as the origin of longitude. In this case, the longitude is also called the right ascension of the ascending node...
from the firstpointofAries (sidereal hour angle, SHA). The hour angle is paired with the declination to fully specify the location of a point on the...
commonly express the timing of perihelion relative to the FirstPointofAries not in terms of days and hours, but rather as an angle of orbital displacement...
constellation of zodiac". Earth Sky. Retrieved 19 July 2019. Gleason, Edward. "Why is the vernal equinox called the "FirstPointofAries" when the Sun...
north is known as the March equinox, also known as the firstpointofAries and the ascending node of the ecliptic on the celestial equator. The crossing...
counterclockwise in right ascension from the FirstPointofAries and is based on Earth's equator and the meridian of the equinox point both extended upwards indefinitely;...
45-51: The Surya Siddhanta identifies the vernal equinox with the FirstPointofAries and hence does not distinguish between the sidereal and tropical...
positions of celestial bodies with respect to the FirstPointofAries (Sun's location at the March equinox). Because of Earth's precession of the equinoxes...
Solwold Jr. (born April 15, 1978), better known by his ring name Austin Aries, is an American professional wrestler. He is known for his time with Impact...
−10, passed into Taurus in December 1989, and is expected to pass into Aries in year 4609. The southern solstice passed from Capricornus into Sagittarius...
visualizes the celestial equator as a semicircle passing through the zenith, the point directly overhead. As the observer moves north (or south), the celestial...
classified as first magnitude stars. FirstPointofAries (♈︎) The location of the March equinox upon the celestial sphere, used as a reference point in celestial...
systems in use: the heliocentric inertial (HCI) system, the heliocentric Aries ecliptic (HAE) system, the heliocentric Earth ecliptic (HEE) system, and...
through the celestial poles and the two equinoxes: the firstpointofAries and the firstpointof Libra. The equinoctial colure passes through the following...
ascension is measured from the Sun at the March equinox i.e. the FirstPointofAries, which is the place on the celestial sphere where the Sun crosses...
zodiac, a norming point near 9 degrees in Aries, the trine aspect, planetary exaltations, and the dodekatemoria (the twelve divisions of 30 degrees each)...
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