Le site de vulgarisation scientifique de l’Université de Liège. ULg, Université de Liège
Spectral type O star

Stars are divided into different types, following their spectral characteristics. Those of type O are blue and extremely hot because at their surfaces there reins a temperature of 30,000K and 45,000K, against our Sun’s 6000K. They are also very massive. Their spectrums are characterised by intense lines of helium.


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