Glossaire beginning with C
- Coma
-
Gas and dust cloud surrounding the nucleus of a comet.
- Constellation
- Imaginary figure (mythological being, animal, instrument, etc.) used as a mnemonic device to locate the position of the stars. Constellations are now defined as parts of the sky roughly bounded by portions of celestial parallels and meridians.
- Continuous spectrum
- Emission or absorption covering a wide wavelength range without preferred wavelength.