The sun is big. The size of the sun is equivalent to 1.3 million earths; the moon is actually very small, and one earth is equivalent to 49 moons. The size of the moon is only one 65 million times that of the sun.
The sun is the central object of the entire solar system. The moon, the earth and other stars all revolve around the sun, and the mass of the sun accounts for 99.86% of the entire solar system.