The Wolf-Rayet phase is a relatively short-lived phase in the life of massive stars, typically 10% of the total life-time of these stars and as such any galaxy is likely to contain few of these.
A fase Wolf-Rayet é unha fase de duración relativamente curta na vida das estrelas masivas, normalmente do 10% do tempo da vida total destas estrelas e é probable todas as galaxias que conteñan unhas poucas destas estrelas.