In astrophysics, stellar nucleosynthesis is the creation of chemical elements by nuclear fusion reactions within stars. Stellar nucleosynthesis has occurred since the original creation of hydrogen, helium and …

Nov 9, 2025 · Fusion reactions are the primary energy source of stars and the mechanism for the nucleosynthesis of the light elements.

May 25, 2025 · The most common fusion reaction in stars is between two isotopes of hydrogen: deuterium and tritium. These fuse to form helium and release a neutron and a large burst of energy.

Oct 22, 2025 · This simple and engaging activity explains nuclear fusion and how radiation is generated by stars, using marshmallows as a delicious model. The toolkit includes the above video, a …

Sep 16, 2025 · In stars, nuclear fusion occurs in their cores, where temperatures and pressures are extremely high. These conditions are necessary for the atomic nuclei to overcome the electrostatic …

Fusion reactions power the Sun and other stars. In fusion, two light nuclei merge to form a single heavier nucleus. The process releases energy because the total mass of the resulting single nucleus is less …

For stars like the sun which have internal temperatures less than fifteen million Kelvin, the dominant fusion process is proton-proton fusion. For more massive stars which can achieve higher …

Sep 1, 2024 · Stellar nucleosynthesis is how stars turn lighter elements into heavier ones through fusion. Early stars formed when hydrogen and helium were pulled together by gravity to start fusion. Heavier …

Sep 21, 2022 · It is nuclear fusion that supplies the stars — including the sun — with their energy, allowing them to generate light. The vast majority of energy that Earth receives comes from the sun, …

Apr 24, 2017 · Most of what makes up a star is hydrogen gas, along with some helium and a mixture of trace elements. The enormous pressure and heat in the Sun's core is sufficient to cause hydrogen …