What do people see when they look up at night?

In your world when people stare up at night what do they see?

Stars, moons, and planets? Constellations and the milky way?

Angry eldritch gods staring back at them?

A flickering hologram projecting an image where the sky should be?

Glittering gems and dripping stalactites?

Space fleets engaged in battle?

Do they know the truth of what's up there or do they just let their imaginations take them?