Here's why:

* Sunlight: During the day, the Sun's overwhelming light scatters in the Earth's atmosphere, making it nearly impossible to see the faint light from distant stars.

* Darkness: At night, with the Sun gone, the sky becomes much darker. This allows the much fainter light from stars to be visible.

* No interference: During the day, sunlight also reflects off objects on the ground and in the air, creating a bright background that further obscures the stars. At night, this interference is minimized.

Therefore, the stars are more visible at night due to the absence of sunlight and the resulting darker sky.