- eclipse
- spring point
- rectascensis
- angular distances
- motions of space bodies
- parallax
- world equator
- ephemerides
- time change of coordinates
- equinox
- ecliptic
- polar axis
- aspects of planets
- celestial phenomena
- zenith
- distance of space bodies
- obscurations
- coordinate systems
- constellations of stars
- declination (astronomy)
- azimuth
- hour angle
- radiant
- star elevation
- horizon
- apex
- nadir
- zodiac
- world pole
- nautical triangle
- world sphere