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Vor 2 Tagen · The helium nucleus, which the reader may identify with the \(\alpha \)-particle emitted in radioactive decay, is a strongly bound state; there is a mass deficit for the products which appears as energy, again through the famous equation \(E = mc^2\). If we had only four protons in the Sun, the energy generated is tiny, but there are billions and billions of them, and that keeps the Sun burning.
Vor 2 Tagen · The Carnot cycle. – In 1824 Sadi Carnot proposed a theoretical heat engine to show that the efficiency was based upon the temperatures between which it operated. – Carnot’s imaginary engine could perform a series of operations between temperatures T1 and T2, so that at the end of these operations the system was restored to the original state.
Vor 4 Tagen · There are two main types of stellar nucleosynthesis: Gaseous carbon-nitrogen-oxygen cycle and the triple-alpha process. The CNO cycle occurs in stars of the following sizes: 1. 5 and 2. 5 solar masses in which carbon nitrogen and oxygen are found where fusion takes place.
Vor 5 Tagen · There, in the so-called carbon-nitrogen-oxygen (CNO) cycle, the nuclei of these elements come together in different ways to form elements from helium onwards. When a star runs out of nuclei...
Vor 3 Tagen · CNO cycle: It refers to the Carbon-Nitrogen-Oxygen cycle, a process of stellar nucleosynthesis in which stars on the Main Sequence fuse hydrogen into helium via a six-stage sequence of reactions. Supernova: A supernova happens when a star has reached the end of its life and explodes in a brilliant burst of light.
Vor 4 Tagen · Stellar Nucleosynthesis. Source: TH. Stellar nucleosynthesis is the process by which stars create the elements inside their cores. The only element not formed in this way is hydrogen, the most abundant and lightest element in the universe. Stellar cores have crushing pressures and temperatures, reaching up to 15 million °C in the Sun's core.
Vor 4 Tagen · More massive stars follow the carbon-nitrogen-oxygen (CNO) cycle, where the nuclei of these elements come together in different ways to form elements starting from helium. As a star runs out of nuclei to fuse, its core contracts, increasing the temperature and triggering further nuclear fusion.
