thingsaurus
This is a 'thesaurus for things' or similarity engine: results show things that have something in common with what you enter. The more stars, the more things in common! You can use it for research, recommendations or simply to explore ideas and related subjects.
Here are your results for Astronomical coordinate systems...
Stars indicate closer matches.
Planetary coordinate system 
- First point of Aries
- Solar longitude
- Constellation
- 45×90 points
- Azimuth
- Compass rose
- Geodesy
- Geographic coordinate system
- Grid north
- Projected coordinate system
- Isoazimuth
- Rhumb line
- Rhumbline network
- Romer
- Rule of marteloio
- Rutter (nautical)
- True north
- Almucantar
- Apparent longitude
- Barycenter (astronomy)
- Barycentric and geocentric celestial reference systems
- Circumpolar star
- Colure
- Declination
- Earth-centered inertial
- Ecliptic
- Ecliptic coordinate system
- Equator
- Celestial equator
- Equatorial coordinate system
- Equinox (celestial coordinates)
- Galactic coordinate system
- Galactic quadrant
- Gaussian year
- Geocentric model
- Horizon
- Horizontal coordinate system
- Hour angle
- Hour circle
- International Celestial Reference System and its realizations
- Invariable plane
- Meridian (astronomy)
- Nadir
- Northern celestial hemisphere
- Orbital normal
- Orbital pole
- Parallactic angle
- Polar distance (astronomy)
- Celestial pole
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