520 Astronomy

Star Trek Spectral Classification

"Stars can generally be classified by their color. A purple star is always Class O, a yellow star is always Class G. However, there can be vast differences within each class. Most Class M stars are tiny and don't emit much light... however, many K- and G-type stars can evolve into red giants. That makes them Class M, but they are NOTHING like the tiny stars that make up the vast majority of Class M stars. Since most stars spend most of their lives on the Main Sequence, the descriptions on this page can be applied to the majority of stars.

Star Trek Nebula Classification

"A nebula is an interstellar cloud of dust, gas, and plasma, where star formation usually occurs. In the year 2400, the Federation introduced a new system to classify nebulae. The new system first assigns the nebula a letter designation based upon its general composition. If the nebula has any unusual quirks, it is assigned an additional number designation. For example, a Class F2 Nebula is a Dark Nebula that contains disruptive electromagnetic radiation."

Star Trek Planetary Classification

"A planet is a celestial body in orbit around a star or stellar remnants, that has sufficient mass for self-gravity and is nearly spherical in shape. A planet must not share its orbital region with other bodies of significant size (except for its own satellites), and must be below the threshold for thermonuclear fusion of
deuterium. If a celestial body meets those requirements, it is considered a planet; at that point, the planet is further classified by its atmosphere and surface conditions into one of twenty-two categories."

Vocabulaire des Sciences et Techniques Spatiales

"Ce vocabulaire fait partie d’une collection de vocabulaires thématiques édités par la Délégation générale à la langue française et aux langues de France, au titre du dispositif d’enrichissement de la langue française. Les différents vocabulaires rassemblent les termes et expressions recommandés par la Commission générale de terminologie et de néologie, qu’elle publie régulièrement au Journal officiel de la République française, en application du décret du 3 juillet 1996 relatif à l’enrichissement de la langue française.

"This vocabulary is part of a collection of thematic vocabularies published by the General Delegation for the French Language and the Languages ​​of France, under the French Language Enrichment Device. The various vocabularies contain the terms and expressions recommended by the General Commission on Terminology and Neology, which it publishes regularly in the Official Journal of the French Republic, pursuant to the decree of 3 July 1996 on the enrichment of the French language.

Unified Astronomy Thesaurus

"The Unified Astronomy Thesaurus (UAT) is an open, interoperable and community-supported thesaurus which unifies the existing divergent and isolated Astronomy & Astrophysics thesauri into a single high-quality, freely-available open thesaurus formalizing astronomical concepts and their inter-relationships. The UAT builds upon the existing IAU Thesaurus with major contributions from the Astronomy portions of the thesauri developed by the Institute of Physics Publishing and the American Institute of Physics.