However, it's important to note that this doesn't mean the Sun is 400 times heavier or has 400 times more volume. Here's why:

* Volume: The Sun is actually about 1.3 million times the volume of the Moon. This is because volume increases with the cube of the diameter.

* Mass: The Sun is 27 million times the mass of the Moon. This is because the Sun is made of much denser material than the Moon.

The reason why the Sun and Moon appear to be roughly the same size in the sky is due to their distances from Earth. The Sun is much farther away from us than the Moon, and this difference in distance makes them appear similar in size.