Meaning Of The Word O star

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O star Meaning

O star Definition
O star Definition

What's The Definition Of O star?

O star in American English
noun: a very hot, massive, blue star of spectral type O, having a surface temperature between 30,000 and 50,000 K and an absorption spectrum with few lines, though the Balmer series of hydrogen lines is present and lines of ionized helium are detectable

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