The sun appears significantly brighter than the moon because it is much larger and hotter, emitting a higher intensity of light. The moon, on the other hand, does not produce its own light but simply reflects the sunlight that hits its surface. Additionally, the moon's surface is covered in dark, rocky material that absorbs some of the sunlight, further reducing its brightness. Finally, the sun is much closer to Earth than the moon, which also contributes to its greater apparent brightness in the sky.
