Besides city lights, what natural phenomenon caused by the atmosphere dims faint light from distant stars on Earth?

Creating a light glow at night

Even in environments considered dark on Earth, away from urban light pollution, the natural presence of the atmosphere itself contributes to dimming the view of the cosmos. This is due to natural airglow, which the text identifies as a 'light glow at night.' This glow is the residual effect of atmospheric processes interacting with solar radiation throughout the day and night cycle. This pervasive, albeit minimal, background luminescence scatters and mixes with the light from distant stars and the Milky Way, thereby reducing the perceived contrast and overall intensity of the faint galactic structures compared to the sharp, high-contrast view achievable in orbit.