- helium poor stars
- estrellas pobres en helio
English-Spanish dictionary of astronomy terms. 2014.
helium poor stars
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Helium hydride ion — The hydrohelium(1+) cation, HHe+, is a positively charged ion formed by the reaction of a proton with a helium atom in the gas phase, first observed in 1925. [cite journal | author = T. R. Hogness and E. G. Lunn | title = The Ionization of… … Wikipedia
Helium fusion — is a kind of nuclear fusion, with the nuclei involved being helium.The fusion of helium 4 nuclei (alpha particles) is known as the triple alpha process, because fusion of just two helium nuclei only produces beryllium 8, which is unstable and… … Wikipedia
Metallicity — The globular cluster M80. Stars in globular clusters are mainly older metal poor members of Population II. In astronomy and physical cosmology, the metallicity (also called Z[1]) of an object is the proportion of its matter made … Wikipedia
Main sequence — A Hertzsprung Russell diagram plots the actual brightness (or absolute magnitude) of a star against its color index (represented as B V). The main sequence is visible as a prominent diagonal band that runs from the upper left to the lower right.… … Wikipedia
List of astronomy acronyms — This is a compilation of acronyms commonly used in astronomy. Most of the acronyms are drawn from professional astronomy and are used quite frequently in scientific publications. However, a few of these acronyms are frequently used by the general … Wikipedia
Sun — This article is about the star. For other uses, see Sun (disambiguation). The Sun … Wikipedia
Red giant — A red giant is a luminous giant star of low or intermediate mass (roughly 0.5 ndash;10 solar masses) that is in a late phase of stellar evolution. The outer atmosphere is inflated and tenuous, making the radius immense and the surface temperature … Wikipedia
Planetary habitability — is the measure of a planet s or a natural satellite s potential to develop and sustain life. As the existence of life beyond Earth is currently uncertain, planetary habitability is largely an extrapolation of conditions on Earth and the… … Wikipedia
Metallicite — Métallicité Pour les articles homonymes, voir Métal (homonymie). En astronomie, on appelle métal tout élément chimique plus lourd que l hydrogène et l hélium. Ces éléments se distinguent de l hydrogène et l hélium car, contrairement à ceux ci,… … Wikipédia en Français
Métal (astronomie) — Métallicité Pour les articles homonymes, voir Métal (homonymie). En astronomie, on appelle métal tout élément chimique plus lourd que l hydrogène et l hélium. Ces éléments se distinguent de l hydrogène et l hélium car, contrairement à ceux ci,… … Wikipédia en Français
Métallicité — Pour les articles homonymes, voir Métal (homonymie). En astronomie, on appelle métal tout élément chimique plus lourd que l hydrogène et l hélium. Ces éléments se distinguent de l hydrogène et l hélium car, contrairement à ceux ci, ils sont très… … Wikipédia en Français
