* The Sun is our closest star: The Sun is the star that's closest to Earth. It's so close that its light overwhelms the light from all other stars during the day. Think of it like a giant, bright spotlight in the sky.

* Earth's rotation: The Earth rotates on its axis, causing day and night. When our side of Earth faces the Sun, we experience daylight. When our side of Earth faces away from the Sun, we experience night.

* Distance and brightness: The stars we see at night are incredibly far away. Even though they're huge and emit a lot of light, their light is greatly weakened by the vast distances. The Sun, being much closer, appears far brighter.

In summary: You can't see other stars during the day because the Sun's light drowns them out. At night, the Sun is on the other side of the Earth, allowing us to see the fainter light from distant stars.