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Angular distance (measured in the plane of the object's orbit and in the direction of its motion) from the ascending node to the perihelion point.
Industry:Astronomy
The point in a planetary orbit that is at the greatest distance from the Sun.
Industry:Astronomy
A system of three lenses which, taken together, correct for spherical aberration, chromatic aberration, and coma.
Industry:Astronomy
The point in the orbit of one component of a binary system which is farthest from the center of mass of the system.
Industry:Astronomy
a satellite made by humans which is gravitationaly bound and in orbit of a larger physical object
Industry:Astronomy
In the orbit of a solar-system body, the point where the body crosses the ecliptic from south to north: for a star, out of the plane of the sky toward the observer.
Industry:Astronomy
