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- The equatorial plane is the plane of Earth's equator12. When projected outwards to the celestial sphere, it defines the celestial equator1. The celestial equator is the fundamental plane of the equatorial coordinate system using spherical coordinates2. In the cycle of Earth's seasons, the equatorial plane runs through the Sun twice a year: on the equinoxes in March and September1.Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.The plane of Earth's equator, when projected outwards to the celestial sphere, defines the celestial equator. In the cycle of Earth's seasons, the equatorial plane runs through the Sun twice a year: on the equinoxes in March and September.en.wikipedia.org/wiki/EquatorThe equatorial coordinate system using spherical coordinates. The fundamental plane is formed by projection of Earth 's equator onto the celestial sphere, forming the celestial equator.en.wikipedia.org/wiki/Equatorial_coordinate_system
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Equatorial coordinate system - Wikipedia
The fundamental plane is the plane of the Earth's equator. The primary direction (the x axis) is the March equinox . A right-handed convention specifies a y axis 90° to the east in the fundamental plane; the z axis is the north polar axis. See more
The equatorial coordinate system is a celestial coordinate system widely used to specify the positions of celestial objects. It may be implemented in spherical or rectangular coordinates, both defined by an See more
Use in astronomy
A star's spherical coordinates are often expressed as a pair, right ascension and declination, … See moreGeocentric equatorial coordinates
There are a number of rectangular variants of equatorial coordinates. All have:
• The origin at the centre of the Earth.
• The fundamental plane in the plane of the Earth's equator. See moreThis description of the orientation of the reference frame is somewhat simplified; the orientation is not quite fixed. A slow motion of Earth's axis, precession, causes a slow, continuous turning of the coordinate system westward about the poles of the See more
• MEASURING THE SKY A Quick Guide to the Celestial Sphere James B. Kaler, University of Illinois
• Celestial Equatorial Coordinate System University of Nebraska-Lincoln
• Celestial Equatorial Coordinate Explorers University of … See moreWikipedia text under CC-BY-SA license Celestial equator - Wikipedia
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WEBNov 16, 2022 — The fundamental plane is the plane of the Earth's equator. The primary direction (the x axis) is the vernal equinox. A right-handed convention specifies a y axis 90° to the east in the fundamental plane; …
Equator - New World Encyclopedia
WEB35 rows — The equator is the intersection of the Earth's surface with the plane perpendicular to the Earth's axis of rotation and containing the Earth's center of mass. In more simple language, it is an imaginary line …
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