Astronomy
- apoapsis
(astronomy) the point in an orbit farthest from the body being orbited.
- periapsis
(astronomy) the point in an orbit closest to the body being orbited.
- node
(astronomy) a point where an orbit crosses a plane.
- equinoctial point
(astronomy) either of the two celestial points at which the celestial equator...
- culmination
(astronomy) a heavenly body's highest celestial point above an observer's horizon.
Sphere
- apex
The point on the celestial sphere toward which the sun and solar system appear to be moving...
- nadir
The point below the observer that is directly opposite the zenith on the imaginary sphere...
- zenith
The point above the observer that is directly opposite the nadir on the imaginary sphere...
Also contains
- pole
One of two points of intersection of the Earth's axis and the celestial sphere.
- antapex
The point opposite in direction from the solar apex; the point the solar system is moving...
- exaltation
The location of a planet in the zodiac at which it is believed to exert its maximum ...