protostars

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• Protostars — Infobox Book | name = Protostars title orig = translator = image caption = author = edited by David Gerrold and Stephen Goldin cover artist = Gene Szafran country = United States language = English series = genre = Science fiction short stories… …   Wikipedia

• Nebular hypothesis — Star formation Interstellar medium Molecular cloud …   Wikipedia

• Star formation — is the process by which dense parts of molecular clouds collapse into a ball of plasma to form a star. As a branch of astronomy star formation includes the study of the interstellar medium and giant molecular clouds as precursors to the star… …   Wikipedia

• Univers (magazine) — Univers était un magazine de science fiction français initialement dirigé par Jacques Sadoul et Yves Frémion, qui parut de 1975 à 1990 aux éditions J ai lu, d abord sous forme trimestrielle, puis sous forme annuelle. Sommaire 1 La revue… …   Wikipédia en Français

• Deuterium burning — is a nuclear fusion reaction that occurs in stars and some substellar objects, in which a deuterium nucleus and a proton combine to form a helium 3 nucleus. It occurs as the second stage of the proton–proton chain reaction, in which a deuterium… …   Wikipedia

• Molecular cloud — See also: Solar nebula Within a few million years the light from bright stars will have boiled away this molecular cloud of gas and dust. The cloud has broken off from the Carina Nebula. Newly formed stars are visible nearby, their images… …   Wikipedia

• Variable star — A star is classified as variable if its apparent brightness as seen from Earth changes over time, whether the changes are due to variations in the star s actual luminosity, or to variations in the amount of the star s light that is blocked from… …   Wikipedia

• List of Firefly planets and moons — Serenity over Whitefall This is a list of fictional planets and moons from the Firefly / Serenity fiction. Characters in the story refer colloquially to these planets as worlds . During the short television run of the Firefly series, it was not… …   Wikipedia

• cosmos — /koz meuhs, mohs/, n., pl. cosmos, cosmoses for 2, 4. 1. the world or universe regarded as an orderly, harmonious system. 2. a complete, orderly, harmonious system. 3. order; harmony. 4. any composite plant of the genus Cosmos, of tropical… …   Universalium

• star — starless, adj. /stahr/, n., adj., v., starred, starring. n. 1. any of the heavenly bodies, except the moon, appearing as fixed luminous points in the sky at night. 2. Astron. any of the large, self luminous, heavenly bodies, as the sun, Polaris,… …   Universalium

• Color–color diagram — In astronomy, color–color diagrams are a means of comparing the apparent magnitudes of stars at different wavelengths. Astronomers typically observe at narrow bands around certain wavelengths, and objects observed will have different brightnesses …   Wikipedia