Variety Ib supernovae are the greater popular and consequence from Wolf–Rayet stars of variety WC which however have helium of their atmospheres. Supernovae activities deliver heavier features which can be scattered through the bordering interstellar medium. The increasing shock wave from the supernova can induce star formation. Galactic cosmic rays https://juliusvncom.ageeksblog.com/34594325/harvard-case-study-help-an-overview