VY Canis Majoris
The Pistol Star, also known as V4647 Sagittarii, is a blue hypergiant star located about 25,000 light years from Earth in the constellation Sagittarius. It is a candidate luminous blue variable (cLBV) and one of the most luminous stars known, with a luminosity 1,600,000 times that of the Sun.
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VY Canis Majoris (VY CMa) is an exceptionally large, luminous red hypergiant star located in the constellation Canis Major.
With a radius about 1,420 times that of the Sun, corresponding to a diameter of 13.2 astronomical units, VY Canis Majoris is one of the largest known stars in the Milky Way. The star lies at an approximate distance of 3,840 light years from Earth and has an apparent magnitude that varies from 6.5 to 9.6. It is classified as a semiregular variable star and has an estimated period of 2,000 days.
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