O star

American  

[oh stahr] / ˈoʊ ˌstɑr /

noun

1. 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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Example Sentences

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O star

Our Sun, a type G star, has a surface temperature of 5800 K. We know, therefore, that it is cooler than a type O star and hotter than a type M star.

From Textbooks ● Oct. 13, 2016

Given what you learned about the temperature ranges of these types of stars, how many times hotter than our Sun is the hottest type O star?

From Textbooks ● Oct. 13, 2016

Estimating the luminosity class of an M star is much more important than measuring it for an O star if you are determining the distance to that star.

From Textbooks ● Oct. 13, 2016

How long, O star of ill-omen, wilt thou afflict me?

From The Book of the Thousand Nights and a Night — Volume 11 [Supplement] by Sir Richard Francis Burton

With starry eyes she unfolded it and read: “O Morning Star that smilest in the blue, O star, my morning dream hath proven true, Smile sweetly, thou! my love hath smiled on me.”

From The Camp Fire Girls' Larks and Pranks or, The House of the Open Door by Hildegard G. (Hildegard Gertrude) Frey

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