



Betelgeuse is a semiregular variable star located approximately 640 light-years from the Earth. The star marks the upper right vertex of the Winter Triangle and center of the Winter Hexagon.
Betelgeuse is a red supergiant, and one of the largest and most luminous stars known. For comparison, if the star were at the center of our solar system its surface might extend out to between the orbits of Mars and Jupiter, wholly engulfing Mercury, Venus, the Earth and Mars.
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