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Noun
1. blue giant (star)Astronomy
Wikipedia definition
2. Blue giantIn astronomy, a blue giant is a star with a spectral type of O or B (thus being noticeably blue in appearance) and a luminosity class of III. In the standard Hertzsprung-Russell diagram, blue giants are found in the upper left corner, due to their high luminosity and early spectral type. A blue giant is a massive star that has exhausted the hydrogen fuel in its core and left the main sequence.
Read “Blue giant” on English Wikipedia
Read “青色巨星” on Japanese Wikipedia
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