Colossal on Nostr: Share the sky with a loved one far away. Hold this cyanometer or sunset postcard up ...

Share the sky with a loved one far away. Hold this cyanometer or sunset postcard up to the sky, mark the corresponding hue, and add a thought or two before dropping it in the mail. 🌇 💌

https://www.thisiscolossal.com/2024/07/cyanometer-postcards/