red supergiant

American  

[red soo-per-jahy-uhnt] / ˈrɛd ˈsu pərˌdʒaɪ ənt /

noun

red supergiants plural

1. Astronomy. a supergiant star with relatively low surface temperature and light that appears reddish.

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red supergiant Scientific  

1. An extremely large red giant star with a minimum of 15 solar masses. The best known red supergiant is Betelgeuse, with a luminosity about 10,000 times that of the Sun. When a supergiant collapses into a supernova, it may result in either a neutron star or a black hole.

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Other Word Forms

Derived Forms

• red-supergiant
  adjective

Inflected Forms

noun

• red supergiants
  plural

Example Sentences

It is a red supergiant of extraordinary size, large enough to contain more than 400 million Suns.

From Science Daily • Jan. 10, 2026

The deluge of dust could help explain why astronomers have struggled to find red supergiant progenitors.

From Science Daily • Oct. 9, 2025

That's the red supergiant Betelgeuse - one of the largest dying stars in the Milky Way!

From Space Scoop • Aug. 20, 2025

The star is Betelgeuse, a red supergiant in the constellation Orion.

From Seattle Times • Dec. 8, 2023

“We think it was quite a complicated merger,” Shenar says—one that possibly involved a helium-rich lower mass star spiraling into the puffy stellar atmosphere of an accompanying red supergiant.

From Scientific American • Aug. 17, 2023