Astronomy and astrophysics Spherical astronomy and astrometry Concept
Celestial sphere
Summary
The celestial sphere is an imaginary sphere centred at the observer on which every celestial object is drawn at the point in its direction. It forgets distances and keeps only directions. All astronomical coordinate systems are coordinate systems on this sphere.
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Further reading
About this page
| Tag | W7GD4WR497 |
|---|---|
| URI | m2://W7GD4WR497 |
| Kind | concept |
| Writing | W0 stub |
| MSC | 85A04 |
| Same as | |
| Changed | 3 November 2026 |
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Definitions
Used by
- Stellar parallax
- Equatorial coordinate system
- Celestial coordinate system
- Spherical astronomy
- Ecliptic coordinate system
- Galactic coordinate system
- Hour angle
- Horizontal coordinate system
- Aberration of light