Kind Ib supernovae are the more common and end result from Wolf–Rayet stars of kind WC which nonetheless have helium in their atmospheres. [201] The majority of the material ejected by Form II supernovae is hydrogen and helium.[202] The significant factors are made by: nuclear fusion for nuclei up to https://cesaricbyp.bloggadores.com/34925327/the-ultimate-guide-to-harvard-case-study-writing-help