* Size difference: The Sun is vastly larger than the Moon. The Sun's diameter is about 109 times the diameter of the Earth, while the Moon's diameter is only about a quarter of the Earth's diameter. So, the Sun is truly gigantic compared to both the Earth and the Moon.
* Distance difference: The Moon is much closer to Earth than the Sun. The Moon is about 238,900 miles (384,400 km) away, while the Sun is about 93 million miles (150 million km) away.
* Perspective: Because of the distance difference, the Sun and Moon appear to be roughly the same size in our sky. This is why we get total solar eclipses where the Moon completely covers the Sun. But this is just a trick of perspective, similar to how objects in the distance appear smaller.
In reality, the Sun is about 400 times larger than the Moon. The reason they appear similar in size is because the Sun is also 400 times farther away.
