Това са думите examples, свързани с metallicity. Щракнете върху която и да е дума, за да отидете на страницата с подробности за думата. Или, отидете на дефиницията на metallicity.
The greater a star's metallicity, the better its chances to have planets.
If the metallicity is too low, there is not enough material to build Earth-like planets.
The process can make planets with enriched metallicities as seen in our own solar system.
For example, the radial galactic metallicity gradient determines isotope concentrations, silica and magnesium concentrations, etc., all of which are important for forming habitable planetary systems.
The bar will hence be able to relocate stars, and stars with low or high metallicity could be found far away from their original orbits.
For example, until sufficient metallicity has developed by the stellar burning of light elements, terrestrial type planets will not form.
This occurs more rapidly in stars that are more massive and lower in metallicity.
Thus, high metallicity stars could be found in all parts of a barred galaxy.
In particular, the association of planet size and occurrence frequency with stellar mass and metallicity will be investigated.
This rules out the outer parts of the disc where the metallicity is low due to slow star formation.
Observations of extrasolar planetary systems indicate that the presence of giant extrasolar planets at small distances from their host stars is strongly correlated with high metallicity of the host stars.
Metallicity tends to play a large role in the formation of planets, determining if they form, and what kind of planet they will form.
In practice, corrections are required to account for variations in age or metallicity from galaxy to galaxy.
The unit often used for metallicity is the dex which is a (now-deprecated) contraction of decimal exponent.
Stars of higher mass and metallicity tend to have more numerous and more massive planets.
The lower metallicity decreases the opacity of their outer layers and decreases the radiation pressure, resulting in a smaller, hotter star for a given mass.
The explanation of their underluminosity lies in their low metallicity: these stars are unenriched in elements heavier than helium.
A moving group is distinguished by its members having about the same age, composition (or metallicity) and motion through space.
