What is another word for proton-proton chain?
Pronunciation: [pɹˈə͡ʊtɒnpɹˈə͡ʊtɒn t͡ʃˈe͡ɪn] (IPA) 
The proton-proton chain is a process that occurs in stars, where hydrogen nuclei combine to form helium. There are several synonyms that can be used to refer to this process in astrophysics, including the PP chain, hydrogen-burning chain, and the Bethe-Weizsäcker cycle. The PP chain is the most common synonym used in literature, while the hydrogen-burning chain emphasizes the fact that hydrogen is the fuel used during this process. The Bethe-Weizsäcker cycle is named after the two physicists who proposed the theory behind the PP chain, and is less commonly used in scientific literature. Overall, these synonyms refer to the same process that occurs in stars to release energy in the form of light and heat.
