Nucleosynthesis Small Stars

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By this time the universe had cooled to a few billion kelvins (10 K) and the rate of nucleosynthesis had slowed down significantly.By the time the universe was three minutes old the process had basically stopped and the relative abundances of the elements was fixed at ratios that didn't change for a very long time: 75% hydrogen, 25% helium, with trace amounts of deuterium (hydrogen-2), helium-3, and lithium-7.The lightest elements (hydrogen, helium, deuterium, lithium) were produced in the Big Bang nucleosynthesis.

By this time the universe had cooled to a few billion kelvins (10 K) and the rate of nucleosynthesis had slowed down significantly.By the time the universe was three minutes old the process had basically stopped and the relative abundances of the elements was fixed at ratios that didn't change for a very long time: 75% hydrogen, 25% helium, with trace amounts of deuterium (hydrogen-2), helium-3, and lithium-7.

Le travail est inspiré du site Jennifer Johnson, Ohio State University. Exploding massive stars = éléments créés lors de la mort des étoiles massives.

Cosmic rays fission = éléments créés par l'interaction de la matière avec les rayons cosmiques Dying low-mass stars = éléments issus des étoiles plus petites.

Update heavy elements to match and add elements to lawrencium, key for synthetic elements, and textures to help the colour blind, as per Nu...

For an independent study course at my high school, I am researching the formation of the elements, both light and heavy.

However, we do see elements higher than iron around us. This is the reason why it is said that most of the stuff that we see around us come from stars and supernovae (the heavy elements part). After that, he worked at the Institute for Astronomy at the University of Hawaii as the Submillimeter Postdoctoral Fellow.

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If you go into technical details, then there are two processes of neutron capture called rapid process (r-process) and the slow process (s-process), and these lead to formation of different elements. Jagadheep is currently at the Indian Institute of Space Scence and Technology.

In the very massive stars, the reaction chain continues to produce elements like silicon upto iron.

Elements higher than iron cannot be formed through fusion as one has to supply energy for the reaction to take place. In a supernova explosion, neutron capture reactions take place (this is not fusion), leading to the formation of heavy elements. s-process and r-process Jagadheep built a new receiver for the Arecibo radio telescope that works between 6 and 8 GHz. These masers occur at sites where massive stars are being born. D from Cornell in January 2007 and was a postdoctoral fellow at the Max Planck Insitute for Radio Astronomy in Germany.

Big Bang nucleosynthesis produced no elements heavier than lithium.

To do that you need stars, which means waiting around for at least 200 billion years.

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