| 单词 | red giant |
| 释义 | red giant noun[C] physicsspecializeduk/ˌred ˈdʒaɪ.ənt/us/ˌred ˈdʒaɪ.ənt/a verylargecoolstarthat gives out areddishlight 红巨星Astronomy
Examplesofred giantred giant First, when stars of at least 0.4 solar masses exhaust their supply of hydrogen, their outer layers expand to form aredgiant. From theCambridge English Corpus Evolution towards theredgiantbranch for the first time is very rapid while stars can spend much longer on the horizontal branch. From Wikipedia  This example is from Wikipedia and may be reused under a CC BY-SA license.Most stars retain more of their hydrogen after the firstredgiantphase, and eventually become asymptotic giant branch stars. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.This is the first ionized nebula to be have been discovered around aredgiantstar. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Serpentis, a coolredgiantthat pulsates between magnitudes 5.89 and 7.07 in 87 days. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Although many of those sources are expanding dust envelopes aroundredgiantstars, a few are found to be associated with solar-type stars. From theCambridge English Corpus Sun-like stars will enter theredgiantbranch as subgiants. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Once a star has evolved sufficiently to become aredgiant, its circumstellar habitable zone will change dramatically from its main-sequence size. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.The star, which is estimated to be at least nine billion years old, has passed theredgiantphase. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.In another few million years it will likely cease hydrogen fusion, expand, and brighten as it becomes aredgiant. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.On an inspiration, they scan "inside" theredgiantstar, and discover a truly ancient rocky world which the star had enveloped in its expansion. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.The star is now approaching the end of its life, and has expanded its outer envelope to become aredgiantstar. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.The s-process is a slow neutron capture of lighter elements inside pulsatingredgiantstars. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.This type of low-mass star has consumed the hydrogen at its core, evolved away from the main sequence, and passed through theredgiantstage. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.It is believed that the surface of the star oscillates slightly, a common feature ofredgiantstars. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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