* Stars are always there: Stars exist 24 hours a day, 7 days a week, shining brightly in space.

* We can't see them during the day: The reason we can't see them during the day is because the sun's light is much brighter, overwhelming the stars' light.

* Nighttime is our window: When the sun sets and the sky gets dark, the stars become visible.

So, while stars are always there, we can only see them at night because the sun's light doesn't block our view.