A very large star of high luminosity and low surface temperature. Red giants are thought to be in a late stage of evolution when no hydrogen remains in the core to fuel nuclear fusion.
〔天文〕红巨星
Example sentencesExamples
It will then turn into a swollen red giant, burning to a frazzle any life left here on Earth.
About a billion years before a sun-like star ‘dies,’ or stops generating energy via nuclear fusion, it becomes a red giant, growing dramatically to a hundred times its original diameter.
Multiple collisions involving red giants and other stars might yield the random orbits her team has observed.
It is believed that eventually the sun will expand into a red giant, swallowing all of the inner planets, and destroying all life on earth.
When its fuel runs out, an old star expands into a red giant and then collapses to become a white dwarf.
Definition of red giant in US English:
red giant
nounˈˌred ˈjīəntˈˌrɛd ˈdʒaɪənt
Astronomy
A very large star of high luminosity and low surface temperature. Red giants are thought to be in a late stage of evolution when no hydrogen remains in the core to fuel nuclear fusion.
〔天文〕红巨星
Example sentencesExamples
It will then turn into a swollen red giant, burning to a frazzle any life left here on Earth.
About a billion years before a sun-like star ‘dies,’ or stops generating energy via nuclear fusion, it becomes a red giant, growing dramatically to a hundred times its original diameter.
When its fuel runs out, an old star expands into a red giant and then collapses to become a white dwarf.
It is believed that eventually the sun will expand into a red giant, swallowing all of the inner planets, and destroying all life on earth.
Multiple collisions involving red giants and other stars might yield the random orbits her team has observed.