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  2. Red giant - Wikipedia

    en.wikipedia.org/wiki/Red_giant

    Fluid dynamics simulations of a red giant, with giant convection cells and puffy surface. A red giant is a luminous giant star of low or intermediate mass (roughly 0.3–8 solar masses (M ☉)) in a late phase of stellar evolution.

  3. Red supergiant - Wikipedia

    en.wikipedia.org/wiki/Red_supergiant

    Higher-mass stars never cool sufficiently to become red supergiants. Lower-mass stars develop a degenerate helium core during a red giant phase, undergo a helium flash before fusing helium on the horizontal branch, evolve along the AGB while burning helium in a shell around a degenerate carbon-oxygen core, then rapidly lose their outer layers ...

  4. The red giant star Betelgeuse is closer than we thought ... - AOL

    www.aol.com/red-giant-star-betelgeuse-closer...

    This red giant star will, one day, explode as a supernova. ... Image credit: NASA / ESA / E. Wheatley / STScI. At the end of 2019, Betelgeuse appeared to dim significantly as seen from Earth ...

  5. List of largest stars - Wikipedia

    en.wikipedia.org/wiki/List_of_largest_stars

    This is the nearest red giant to the Earth, and the fourth brightest star in the night sky. Pollux (β Geminorum) 9.06 ± 0.03 [95] AD The nearest giant star to the Earth. Spica (α Virginis A) 7.47 ± 0.54 [101] One of the nearest supernova candidates and the sixteenth-brightest star in the night sky. Regulus (α Leonis A) 4.16 × 3.14 [102]

  6. Detailed image of red giant confirms theory about massive stars

    www.aol.com/news/2018-01-30-detailed-image-of...

    The red giant π1 Gruis is 530 light-years away, and it's reaching the end of its natural life. Soon, scientists think it will become a planetary nebula. But before it dies, astronomers are using ...

  7. Astronomers discover strange new type of star hidden in the ...

    www.aol.com/news/never-seen-old-smoker-stars...

    Red giants form when stars have exhausted their supply of hydrogen for nuclear fusion and begin to die. In about 5 or 6 billion years, our sun will become a red giant, puffing up and expanding as ...

  8. HD 18438 - Wikipedia

    en.wikipedia.org/wiki/HD_18438

    HD 18438 is a red giant star in the deep northern constellation of Cepheus, located about 730 light-years (220 parsecs) from Earth.With an apparent magnitude of 5.49, it is visible by the naked eye under dark skies as a red-hued dot of light about 10 degrees away from the celestial north pole.

  9. VY Canis Majoris - Wikipedia

    en.wikipedia.org/wiki/VY_Canis_Majoris

    VY Canis Majoris (abbreviated to VY CMa) is an extreme oxygen-rich red hypergiant or red supergiant (O-rich RHG or RSG) and pulsating variable star 1.2 kiloparsecs (3,900 light-years) from the Solar System in the slightly southern constellation of Canis Major.