Mean Diameter of the Sun

The Sun is the largest object in our solar system and it is about 1.4 million kilometres in diameter.
To give a sense of scale, you could fit more than one million Earth-sized bodies inside the Sun due to its large volume.
Based on the Sun’s diameter and using the formula for volume of a sphere (4/3πr³), its estimated volume is a staggering 1.41 x 10^18 cubic kilometres.
The Sun’s large size is directly related to its tremendous gravitational force, which is strong enough to keep all the planets, including the Earth, in their respective orbits.
Solar radius is a common way to express the size of the Sun in astronomical terms. One solar radius is approximately 695,700 kilometres. Two solar radii make up the mean diameter of the Sun.
Due to its large size and mass, the Sun is classified as a G-type main-sequence star (or G dwarf star).
Although vast, the Sun is by no means the largest star in the universe. Numerous stars, called supergiants and hypergiants, vastly exceed it in size and mass.

Remember, understanding the size of the Sun is fundamental for understanding its structure, energy production, and its effect on the rest of the solar system. It is also essential for your understanding of astronomical distances, which are often measured in terms of how many times they exceed the diameter of the Sun.