What is the largest star in our galaxy?
We can’t measure every star in the galaxy, and even those that can be measured have some uncertainty because they’re a long way away. The biggest thought to be observed is designated VY Canis Majoris. VY indicates it’s a variable star, and Canis Majoris means it’s in the constellation Canis Major, or the Greater Dog. It’s believed to have a diameter somewhere between the size of Jupiter and Saturn’s orbits. It’s faint even through a medium-sized amateur telescope because of its distance from us. At that size, the star’s outer layers “peter out” into space, so it’s hard to tell where the star actually ends.
