- elemental abundance
- 元素丰度
Medical Chinese dictionary (湘雅医学词典). 2013.
Medical Chinese dictionary (湘雅医学词典). 2013.
Abundance of the chemical elements — Estimated proportions of matter, dark matter and dark energy in the universe. Only the fraction of the mass and energy in the universe labeled atoms is composed of chemical elements. The abundance of a chemical element measures how relatively… … Wikipedia
spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… … Universalium
Abiogenic petroleum origin — is a largely abandoned hypothesis that was proposed as an alternative to theory of biological petroleum origin. It was relatively popular in the past, but it went largely forgotten at the end of the 20th century after it failed to predict the… … Wikipedia
Nucleosynthesis — Nuclear physics Radioactive decay Nuclear fission Nuclear fusion Classical decays … Wikipedia
Vega — Starbox begin name=Vega Starbox image caption = Location of Vega in the constellation Lyra. Starbox observe epoch=J2000.0 constell=Lyra ra=RA|18|36|56.3364cite web author=Staff date=October 30, 2007 url=http://simbad.u strasbg.fr/simbad/sim… … Wikipedia
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
Cosmic ray — For the film, see Cosmic Ray (film). Cosmic radiation redirects here. For some background types of cosmic radiation, see cosmic background radiation and cosmic background. The energy spectrum for cosmic rays Cosmic rays are energetic charged… … Wikipedia
Abundances of the elements (data page) — … Wikipedia
72 Herculis — Constelación Hércules Ascensión recta α 17h 20min 39,57s Declinación δ +32º 28’ 03,9’’ Distancia … Wikipedia Español
Estrella de mercurio-manganeso — Saltar a navegación, búsqueda Se denominan estrellas de mercurio manganeso a una clase de estrellas peculiares no magnéticas que presentan una línea prominente a 398,4 nm[1] en su espectro, debido a la absorción de mercurio ionizado. Suelen ser… … Wikipedia Español
Psi Cancri — Constelación Cáncer Ascensión recta α 08h 10min 27,18s Declinación δ +25º 30’ 26,4’’ Distancia … Wikipedia Español