The biggest stars in the Universe are the monster red hypergiants, measuring up to 1,500 times the size of the Sun. But what are the smallest stars in the Universe? The smallest stars around are the tiny red dwarfs. These are stars with 50% the mass of the Sun and smaller.What is the biggest star we know of?
The largest star that we know of is called VY Canis Majoris it’s a long way from Earth between 3,900 and 5,000 light years. It’s so big if it was the Sun in our solar system its surface would extend past Jupiter. The French astronomer Jérôme Lalande is believed to be the person who discovered the star back in 1801.