One of my personal little hobbies has been to take a photo of the clear blue sky and post it to Instagram with no other context or explanation. I find it soothing, but I have fallen out of using it since I no longer use Instagram. So, I decided to instead collect all of the images here! Click on any image to view it in its original size and scale. All images are in the public domain Creative Commons Zero; it’s the sky, I don’t own it!
I also wrote an article in The Atlantic explaining the whole thing with some possible artistic antecedents as well. There also is a zip archive (8.2MB) if you want to use them for your own projects. If you make something cool, please let me know!