* Size: The Sun is a star, and it's incredibly massive. It has a diameter of about 1.39 million kilometers, while the Moon has a diameter of only about 3,474 kilometers.

* Volume: The Sun's volume is about 1.3 million times larger than the Moon's volume.

* Mass: The Sun's mass is about 333,000 times greater than the Moon's mass.

Why the Moon appears bigger sometimes:

Even though the Sun is much bigger, the Moon can sometimes appear to be the same size or even bigger than the Sun in the sky. This is because:

* Distance: The Moon is much closer to Earth than the Sun. The distance between the Earth and the Moon is about 384,400 kilometers, while the distance between the Earth and the Sun is about 150 million kilometers.

* Optical Illusion: The Moon's position in the sky can create an optical illusion where it seems larger than it really is, especially when it's close to the horizon.

So, while the Moon might appear larger sometimes, the Sun is actually much, much bigger.