sky

The green flash is a brief burst of green light seen at the top of the Sun just as it sets or rises.

Noctilucent clouds are the highest clouds on Earth, glowing electric blue in the twilight sky around 80 kilometres up.

Zodiacal light is a faint, cone-shaped glow in the night sky caused by sunlight reflecting off dust spread through the inner Solar System.

A meteor shower is a celestial event in which many meteors appear to radiate from one point in the sky as Earth passes through debris left by a comet.