Space. It's mysterious, possibly infinite, and as captured in these photographs by NASA astronaut Don Pettit, absolutely stunning.
Slate reports, "The images...were taken 240 miles up in space by combining multiple 30-second exposure photos, and then stacking them together with imaging software. The resulting “star trail” images, as he calls them, essentially show the paths made by stars and earth lights over 10 to 15 minutes."
Learn more and see all the fantastic images at: