lithium poor stars

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• Lithium — (pronEng|ˈlɪθiəm) is a chemical element with the symbol Li and atomic number 3. It is a soft alkali metal with a silver white color. Under standard conditions, it is the lightest metal and the least dense solid element. Like all alkali metals,… …   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

• 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

• 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

• Brown dwarf — Brown dwarfs are sub stellar objects which are too low in mass to sustain hydrogen 1 fusion reactions in their cores, which is characteristic of stars on the main sequence. Brown dwarfs have fully convective surfaces and interiors, with no… …   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

• Life Sciences — ▪ 2009 Introduction Zoology       In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …   Universalium

• Nuclear fusion — Nuclear physics Radioactive decay Nuclear fission Nuclear fusion Classical dec …   Wikipedia

• Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …   Universalium