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Learn about red supergiants, the largest stars in the universe by volume, with spectral types K and M. Find out their properties, classification, variability, and examples of bright and famous red supergiants.
Red supergiants are the largest stars in the universe, but not the most massive. They form when high-mass stars fuse helium rapidly and expand, becoming red due to their low surface temperature. They eventually explode as supernovae or leave behind neutron stars or black holes.
Learn how red giant stars form, evolve and die, and how they affect their planetary systems. Find out when our sun will become a red giant and what will happen to Earth and other planets.
Betelgeuse is a red supergiant star in the constellation of Orion, with a variable apparent magnitude ranging from +0.0 to +1.6. It is the brightest star in the night sky at near-infrared wavelengths and will likely explode as a supernova in the future.
Learn how red supergiants are formed from massive stars that exhaust their hydrogen and continue to burn in the triple-alpha process. See examples of red supergiants like Betelgeuse and Arcturus, and their characteristics and fates.
Betelgeuse is a red supergiant star that is one of the brightest and largest stars in the night sky. It is part of the constellation Orion, also known as the Hunter, and has a history of changing brightness and ejecting material into space.
A red supergiant star is the biggest type of star in the Universe, with a radius larger than 1500 times the Sun. It forms when a star with more than 10 solar masses runs out of...
Analyzing data from NASA's Hubble Space Telescope and several other observatories, astronomers have concluded that the bright red supergiant star Betelgeuse quite literally blew its top in 2019, losing a substantial part of its visible surface and producing a gigantic Surface Mass Ejection (SME).
What is a Red Supergiant? A red supergiant occurs when a moderately massive star — perhaps 8–40 solar masses in size — exhausts its hydrogen fuel, evolves off of the main sequence, and transitions to fusing helium within its core.
Betelgeuse, a red supergiant star, lost a large part of its visible surface and produced a dust cloud in 2019, an unprecedented event for a normal star. Hubble observations revealed the star's fractured photosphere, dimming, and disrupted pulsation, and clues to its evolution and fate.