Learn more about what a star’s color means and while you’ll never see a twinkling green star in the night sky.

The light rays from the sun range in color across the color spectrum, including green, and when they are filtered through our blue atmosphere, they appear yellow.

Back to Article List The sky isn’t just blue — airglow makes it green, yellow, and red too The sky looks blue on a sunny day. But at night, we can see the faint glow of its true color.

The sky isn’t just blue – airglow makes it green, yellow and red too The distinct colours of airglow are the result of atoms and molecules releasing particular amounts of energy in the form of ...

So the sky isn’t blue, at least not always. It is a glow-in-the-dark night sky too, coloured a mix of green, yellow and red.