TIL with a radius between 640 and 764 times that of the Sun, the surface of the red supergiant star Betelgeuse (the tenth-brightest star in the night), if it were at the centre of our Solar System, would lie beyond the asteroid belt and it would engulf the orbits of Mercury, Venus, Earth, and Mars.

https://en.wikipedia.org/wiki/Betelgeuse
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1gowd0d/til_with_a_radius_between_640_and_764_times_that/