Record the impact of light pollution during the shortest day of the year

Hello all,

This is an opportunity to participate in a Guinness book of records science observation. Low effort big impact. June 21, longest/shortest day.

Share with your respective families and friends

https://cosmosmagazine.com/earth/sustainability/longest-night-darkest-sky/?utm_source=Cosmos+-+Master+Mailing+List&utm_campaign=2b74e9cc6f-RSS_EMAIL_CAMPAIGN&utm_medium=email&utm_term=0_3f5c04479a-2b74e9cc6f-180420113&mc_cid=2b74e9cc6f&mc_eid=13f1fe241d