The radius of the Sun is one hundred times that of the Earth (big Sun!).
The radius of the Moon is one-third that of the Earth (small Moon!).
You could line up 64 Earths in a row to reach the Moon, but it takes 25,000 Earths laid in a row to reach the Sun.
The Sun itself is larger than the whole Earth–Moon separation (the size of the Moon's orbit around the Earth), and the Sun is very far away.