Ecliptic - Wikipedia
The ecliptic forms one of the two fundamental planes used as reference for positions on the celestial sphere, the other being the celestial equator. Perpendicular to the ecliptic are the …
Celestial equator - Wikipedia
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 reference in the equatorial coordinate system .
Orbits and the Ecliptic Plane - HyperPhysics
In the Earth's frame of reference, the Sun's apparent path is called the ecliptic. The ecliptic plane is inclined at 23.5° with respect to the celestial equator because of the tilt of the Earth's …
What Is the Ecliptic? - Sky & Telescope
2022年7月28日 · The ecliptic, simply put, is the plane of Earth’s orbit around the Sun. It extends beyond that to include the seven other planets — and, because it’s imaginary, actually beyond …
Ecliptic | Definition, Facts, Obliquity, & Zodiac | Britannica
2024年10月21日 · Ecliptic, in astronomy, the great circle that is the apparent path of the Sun among the constellations in the course of a year; from another viewpoint, the projection on the …
Ecliptic coordinate system - Wikipedia
In astronomy, the ecliptic coordinate system is a celestial coordinate system commonly used for representing the apparent positions, orbits, and pole orientations [1] of Solar System objects.
Ecliptic vs. Celestial Equator: Understanding Differences
2024年6月24日 · In this blog, we'll explore the distinctions between the ecliptic and the celestial equator, shedding light on their significance in astronomy. The ecliptic is the apparent path …
Celestial Sphere - University of Illinois Urbana-Champaign
The celestial sphere is tipped relative to the observer in the same way as is the Earth. The extension of the Earth's rotation axis to the sky defines the North and South Celestial Poles …
(2) The Path of the Sun, the Ecliptic - NASA
Planets seen in the sky are always near the ecliptic, which means that their orbits are never too far from the plane of the ecliptic. In other words, the solar system is rather flat, with all its major …
Chapter 2: Reference Systems - NASA Science
Another important feature intersecting the celestial sphere is the ecliptic plane. This is the plane in which the Earth orbits the Sun, 23.4° from the celestial equator.