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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 ...
The equatorial coordinate system is a celestial coordinate system widely used to specify the positions of celestial objects.
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 ...
The ecliptic or ecliptic plane is the orbital plane of Earth around the Sun. From the perspective of an observer on Earth, the Sun's movement around the ...
Jan 19, 2017 · The equator is the only line of latitude which is also a great circle — that is, one whose plane passes through the center of the globe. The ...
A near-equatorial orbit is an orbit that lies close to the equatorial plane of the object orbited. Such an orbit has an inclination near 0°.
The orbital plane of a revolving body is the geometric plane in which its orbit lies. Three non-collinear points in space suffice to determine an orbital ...
An inclination of 0° means the orbiting body has a prograde orbit in the planet's equatorial plane. · An inclination greater than 0° and less than 90° also ...
The intersections of the equatorial and ecliptic plane with the celestial dome are great circles known as the celestial equator and the ecliptic. The ...