What If This Giant Star Replaced the Sun

Stephenson 2-18 is an enormous red supergiant, often described as a red hypergiant candidate. Its estimated radius is around 2,150 times the Sun’s radius. If it replaced the Sun, its outer layers could extend beyond the orbit of Saturn. The star is also thousands of times wider than the Sun and shines with enormous power. But its exact size is uncertain because measuring distant red supergiant stars is extremely difficult. That is why scientists describe it as one of the largest known stars—not definitively the largest star in the universe. What would happen to the Solar System if a star this massive replaced the Sun? This video is a scientific visualization, not a real photograph of the star’s surface. #Stephenson2-18 #redhypergiant #redsupergiant #biggeststar #largestknownstar #giantstar #starbiggerthanSun #starlargerthanSaturnorbit #Saturnorbit #universefacts #spacefacts #astronomyfacts #starfacts #solarsystem #cosmicgiant #sciencefacts #astronomyshorts #spaceshorts #universe