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The early Universe appears to have contained only light elements, mostly hydrogen and helium, and ...

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The early Universe appears to have contained only light elements, mostly hydrogen and helium, and ...

The early Universe appears to have contained only light elements, mostly hydrogen and helium, and yet, at the present time, there are significant amounts of heavier elements, those from which the Earth (and ourselves) are made. From where have these heavy elements come?

(a)   Nuclear fusion and element synthesis in the deep interiors of stars.
(b)   Repeated energetic collisions of light element nuclei (cosmic rays) in space which produced heavier elements by nuclear fusion.
(c)   Minor amounts of heavier elements, formed in the initial Big Bang at the formation of the Universe, became concentrated in certain parts of galaxies to form solar systems such as our own.

Textbook

Discovering the Universe

Edition: 7^th

Authors: Kaufmann, Comins

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7 years ago

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