| 释义 |
WordReference Random House Unabridged Dictionary of American English © 2024O star (ō′ stär′),USA pronunciation - Astronomya 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.
Cf. spectral type. |