“The conditions we create in one of these implosions are very similar in density and very similar in temperature to the interior of a star.” The first three experiments in the campaign focused on the “proton-proton 1” chain of nuclear reactions, at the beginning of the stellar nucleosynthesis cycle.
In the core of the sun and other stars, nuclear fusion converts hydrogen into helium, and a small amount of matter is turned into energy in the process.
The Simons Observatory will be built in the Chilean Atacama desert at an ...
A rocky extrasolar moon (exomoon) with bubbling lava may orbit a planet 550 light-years away from us.
Big Bang nucleosynthesis begins about one minute after the Big Bang, when the universe has cooled enough to form stable protons and neutrons, after baryogenesis.
From simple thermodynamical arguments, one can calculate the fraction of protons and neutrons based on the temperature at this point.He tells of the increase in our confidence in the standard model of cosmology to the extent ...Most of the nuclear reactions that drive the nucleosynthesis of the elements in our universe occur in very extreme stellar plasma conditions.We show that the observed Li versus Fe trend provides a strong discriminant between alternative models for Galactic chemical evolution of the light elements at early epochs.We critically assess current systematic uncertainties and determine the primordial Li abundance within new, much tighter limits: (Li/H) is now limited as much by uncertainties in the nuclear cross sections used in big bang nucleosynthesis (BBN) calculations as by the observed abundance itself.This intense environment found in the deep interiors of ...Astronomers like to say we are the byproducts of stars, stellar furnaces that long ago fused hydrogen and helium into the elements needed for life through the process of stellar nucleosynthesis. The silence of an immense desolate land in which to search for reverberations coming from the time at which everything began.“Models of the production of nuclei in the cosmos depend on having accurate data to inform those models.And studying those reactions in conditions that are actually applicable to the interior of stars or to the universe during the Big Bang is very challenging.Thus, we are able to remove the threat that Thank you for your interest in spreading the word about Science.NOTE: We only request your email address so that the person you are recommending the page to knows that you wanted them to see it, and that it is not junk mail.