Astronomy Glossary
There are currently 2 names in this directory beginning with the letter N.
N
natural satellite
Also moon.
Any astronomical body that orbits a planet, minor planet, or sometimes another small Solar System body.
Any astronomical body that orbits a planet, minor planet, or sometimes another small Solar System body.
nebula
Any astronomical object of indistinct nebulosity. In modern usage, the term typically refers to an interstellar cloud of dust, hydrogen, helium, and other ionized gases. Historically, it was also used to refer to extended sources of luminosity that could not be resolved into their individual components, such as star clusters and galaxies.
