noun
blue giant
Astronomical term for a hot, luminous star of spectral type O or B. Used in scientific and educational contexts.
青色巨星は、太陽よりもはるかに大きくて熱い星です。
A blue giant is a star that is much larger and hotter than the sun.
赤色巨星 (red giant) is a cooler, evolved star, while 青色巨星 is a hot, massive main-sequence or slightly evolved star.
Compound of 青色 (blue) and 巨星 (giant star), a calque of English 'blue giant'.