Wolf rayet stars are rare type of stars with one of the massive stars in the galaxy and universe. Their temperature is very hot 30,000 kelvin to 210,000 kelvin, their spectra shows highly ionized oxygen, helium, nitrogen and carbon and other heavy elements on their surface. They are found in different types such as WN ,WO and WC. The wolf rayet star is a exposed layer of a massive O type star which is very hot. This happened to very massive O type stars when a massive star evolved into giant star. The star shed its outer cool layers and expose its inner hotter layers.<br />Music:- Our Journey - tubebackr [Audio Library Release] · Free Copyright-safe Music<br />#wolfrayet #sizecomparison #massivestars<br />...<br /><a href="https://www.youtube.com/watch?v=pLlcSzC9jXs" target="_blank" rel="nofollow">https://www.youtube.com/watch?v=pLlcSzC9jXs</a>