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NML Cygni
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NML Cygni or V1489 Cygni is a red hypergiant or red supergiant (RSG) in the constellation Cygnus. It is possibly one of the largest known stars currently known by radius, and is also possibly one of the most luminous and massive cool hypergiants, as well as one of the most luminous stars in the Milky Way.
NML Cygni, seen as the deep red star at the center, from the Sloan Digital Sky Survey DR9. Note the green circumstellar nebula surrounding the star.
NML Cygni, seen as the deep red star at the center, from the Sloan Digital Sky Survey DR9. Note the green circumstellar nebula surrounding the star.
H-alpha light image of Cygnus OB2, the stellar association in which NML Cygni is located
H-alpha light image of Cygnus OB2, the stellar association in which NML Cygni is located
VY Canis Majoris
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VY Canis Majoris is an extreme oxygen-rich red hypergiant or red supergiant and pulsating variable star 1.2 kiloparsecs from the Solar System in the slightly southern constellation of Canis Major. It is one of the largest known stars, one of the most luminous and massive red supergiants, and one of the most luminous stars in the Milky Way.
Portrait in bust of Jérôme Lalande in 1802
Combined optical and infrared image of VY CMa. The bright star at the upper right is τ Canis Majoris. (ESO/Digitized Sky Survey 2)
Combined optical and infrared image of VY CMa. The bright star at the upper right is τ Canis Majoris. (ESO/Digitized Sky Survey 2)
VLBA used to derive VY CMa's 2011 distance estimate
VLBA used to derive VY CMa's 2011 distance estimate
(July 2008, outdated). Relative sizes of the planets in the Solar System and several stars, including VY Canis Majoris: 1. Mercury < Mars < Venus < Ea
(July 2008, outdated). Relative sizes of the planets in the Solar System and several stars, including VY Canis Majoris: 1. Mercury < Mars < Venus < Earth 2. Earth < Neptune < Uranus < Saturn < Jupiter 3. Jupiter < Proxima Centauri < Sun < Sirius 4. Sirius < Pollux < Arcturus < Aldebaran 5. Aldebaran < Rigel < Antares < Betelgeuse 6. Betelgeuse < Mu Cephei < VV Cephei A < VY Canis Majoris.