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Stars in the universe vary greatly in size. Neutron stars, for example, can have diameters of just a few tens of kilometers, while white dwarfs are comparable in size to Earth. Although our Sun has a diameter about 109 times that of Earth, it is classified as a relatively small star. This becomes more apparent when compared to actual stellar giants. For example, Deneb, a blue-white supergiant in the Cygnus constellation, is around 200 times the size of the Sun. The red supergiant Betelgeuse, located in the Orion constellation, is even larger, measuring about 730 times the Sun's diameter. One of the largest stars known, UY Scuti, a red supergiant in the Scutum constellation, has a colossal diameter approximately 1700 times that of our Sun.
