Sky

This is a sky atmosphere setup made with Geometry Nodes.

Volumetric atmosphere

This is a real-world sized Earth atmosphere, it's making use of volumetrics to achieve realistic scattering shading.

Easy

With just 2 parameters to control the Sun direction, you control the look of the sky in your scene.

Sun

The setup has a Sun lamp with the limb darkening effect already applied, and with accurate irradiance values.