Below is a video showing the planets and a few stars to scale. One of the last stars in the video is Herschel's Garnet Star mentioned in the post below. The star is also known as Mu Cephei. Mu Cephei is so huge that if the Sun were to exchange places with it, the Earth would be inside the star. This red supergiant would also swallow up Mars and Jupiter and almost reach out to the orbit of Saturn.