A satellite image of Europe at night
Media playback is unsupported on your device
Video

Webscape: The citizen projects recording light pollution

From the apps which measure and record the light pollution in your area to a site that aims to prove that your photo is real, Kate Russell rounds up some of the best websites and apps.

Watch more clips on the Click website. If you are in the UK you can watch the whole programme on BBC iPlayer.

Go to next video: Bidding for art with emotions