Ideas we're prototyping to help protect the night sky.
Type in an address and scroll back through time to see how its night sky has changed: historical satellite imagery, estimated sky darkness, and roughly how many visible stars have been lost.
Students and stargazers anywhere can upload sky photos or sky-quality readings. We turn that into a live, crowd-sourced map of dark skies.
Have a question, or an idea of your own? Contact us.