Equatorial coordinate system - Wikipedia
WebThe 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.
Equator - Wikipedia
WebThe 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.
Celestial equator - Wikipedia
WebCelestial equator. ecliptic axial tilt obliquity rotation axis orbital plane. The celestial equator is the great circle of the imaginary celestial sphere on the same plane as the equator of Earth. By extension, it is also a plane of …
Equator | Definition, Location, & Facts | Britannica
WebMar 26, 2024 · Equator, great circle around Earth that is everywhere equidistant from the geographic poles and lies in a plane perpendicular to Earth’s axis. This geographic, or terrestrial , Equator divides Earth into the Northern and Southern hemispheres and forms the imaginary reference line on Earth’s surface from which latitude is reckoned; in other ...
6.3: Equatorial Coordinates - Physics LibreTexts
WebThe equatorial coordinate system is used to specify the positions of celestial objects. It may be implemented in spherical or rectangular coordinates, both defined by an origin at the centre of …
Equator - New World Encyclopedia
WebThe 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 on the Earth's surface that is everywhere equidistant from the North Pole and South Pole .
Celestial coordinate system - Simple English Wikipedia, the free ...
WebImagine the Earth's equator extended out to an infinite distance. The equatorial describes the sky as seen from the solar system. Modern star maps almost exclusively use equatorial coordinates. Eclyptic system. The fundamental plane is the plane of the Earth's orbit, also called the ecliptic plane. There are two versions: the geocentric ...
Web1 The Equatorial Coordinate System We can de ne a coordinate system xed with respect to the stars. Just like we can specify the latitude and longitude of a place on Earth, we can specify the coordinates of a star relative to a coordinate system xed with respect to the stars. Look at Figure 1.5 of the textbook for a de nition of this coordinate ...
Astrodynamics/Coordinate Systems - Wikibooks
WebApr 10, 2023 · The geocentric-equatorial coordinate system uses the center of the earth as the origin, and uses the circle of the Earth's equator as the fundamental plane with the positive vertical axis is the north pole of the earth. Two different coordinate frames are generally employed: the Earth-centered, Earth fixed (ECEF) frame, which is non-inertial ...
Equator - National Geographic Society
WebOct 19, 2023 · An equator is an imaginary line around the middle of a planet or other celestial body.It is halfway between the north pole and the south pole, at 0 degrees latitude.An equator divides the planet into a northern hemisphere and a southern hemisphere. Earth is widest at its Equator. The distance around Earth at the Equator, its …
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