Télécharger Cauldrons in the Cosmos: Nuclear Astrophysics (Theoretical Astrophysics) Livre

Main sequence Wikipedia ~ When nuclear fusion of hydrogen becomes the dominant energy production process and the excess energy gained from gravitational contraction has been lost the star lies along a curve on the Hertzsprung–Russell diagram or HR diagram called the standard main sequence

주계열 위키백과 우리 모두의 백과사전 ~ 성간매질의 기체와 먼지로 이루어진 거대분자운이 진즈 불안정성에 의해 붕괴되면 원시별이 형성된다 원시별의 초기 조성은 수소 70 헬륨 28 나머지 그외 원소들로 대체로 균질하다 항성의 초기질량은 분자운 속에서 원시별 주위의 환경에 의해 결정된다

Sequência principal – Wikipédia a enciclopédia livre ~ Todas as estrelas da sequência principal têm um núcleo onde energia é gerada por fusão nuclear de hidrogênio em hélio A temperatura e densidade desse núcleo estão no nível certo para produzir uma quantidade de energia suficiente para sustentar o resto da estrela

Hauptreihe – Wikipedia ~ Die Hauptreihe wird in der Astronomie durch die Sterne gebildet die ihre Strahlungsenergie durch Wasserstoffbrennen im Kern freisetzen Der Name kommt daher dass die Mehrheit aller beobachteten Sterne solche Sterne sind und im HertzsprungRussellDiagramm HRD und ähnlichen Diagrammen eine dicht bevölkerte Linie bilden

Cosmic ray Wikipedia ~ Cosmic rays are highenergy protons and atomic nuclei which move through space at nearly the speed of light They originate from the sun from outside of the solar system or even from distant galaxies Upon impact with the Earths atmosphere cosmic rays can produce showers of secondary particles that sometimes reach the surface

Nukleosynthese – Wikipedia ~ Die Kerne chemischer Elemente schwerer als Wasserstoff entstehen laufend durch Kernreaktionen im Innern von Sternen Noch bevor erste Sterne entstehen konnten bildeten sich im Rahmen der primordialen Nukleosynthese bereits Deuterium Helium3 Helium4 sowie Spuren von Lithium7

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