What is the approximate rarity of O-type stars within the Milky Way galaxy?

Answer

About one in every ten million stars

O-type stars are exceedingly rare, constituting only about one in every ten million stars found in the Milky Way galaxy.

What is the approximate rarity of O-type stars within the Milky Way galaxy?

#Videos

Why Are O-Type Stars the Hottest and Bluest? - YouTube

astronomytemperaturestarsstellar classificationO-type stars