The helium abundance in the current universe is due partly to the Big Bang and partly to stellar evolution. c. is due only to stellar evolution. Another testimony to the big bang theory is the discovery of the large number of "light elements" Hydrogen and Helium found in the universe.

... Cosmic microwave background radiation, abundance of helium- observed and predicted. Study 21 Chapter 14 The Expansion of Space flashcards from Sneha S. on StudyBlue. The helium abundance in the current universe a. is due partly to the Big Bang and partly to stellar evolution. b. is due only to the Big Bang. Eventually, massive stars (around 8 times more massive than our Sun) run through their supply of hydrogen. It is present at about 24% of the total elemental mass, which is more than 12 times the mass of all the heavier elements combined.
Start studying ASTR 100 Chaper 21 The Expanding Universe quiz. Finally, the abundance of the "light elements" Hydrogen and Helium found in the observable universe are thought to support the Big Bang model of origins. When they look into the universe, astronomers observe that nearly all galaxies are moving away from the Milky Way. Hydrogen atoms are just protons. Scientists think that terrestrial life probably originated in Earth's oceans because

Hydrogen-Helium Abundance Hydrogen and helium account for nearly all the nuclear matter in today's universe.

Learn vocabulary, terms, and more with flashcards, games, and other study tools. In stars, hydrogen fuses into helium. Its abundance is similar to this in both the Sun and in Jupiter.
Right now, the most abundant element in the universe is hydrogen. Protons are the only stable composite particles that can be formed from quarks. d. is unknown at large scales. Helium is the second lightest and second most abundant element in the observable universe (hydrogen is the lightest and most abundant). The helium abundance in the current universe is due. Then, the core of helium contracts, supplying enough pressure to …

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