A film made with the help of DiCaLum

I have been studying the quality of the starry sky. With the naked eye, the night sky is colourless. The film shows the results of our study on the variation of the colours of the night sky. People usually think that the night sky is blue. Spectra taken under the pristine sky can tell us precisely the actual colour of the night sky, even when our eyes can no longer see it.

The Colour of the Night Sky: