No, the sky doesn’t really do this. Ordinary star trails don’t make a spiral pattern, but instead look more like this. We really like this processed photo by Sergio Garcia Rill, though. He captured the original photo in Arches National Park in eastern Utah, then processed it in a way he explains in detail in his blog.
Thank you, Sergio!
Deborah Byrd created the EarthSky radio series in 1991 and founded EarthSky.org in 1994. Today, she serves as Editor-in-Chief of this website. She has won a galaxy of awards from the broadcasting and science communities, including having an asteroid named 3505 Byrd in her honor. A science communicator and educator since 1976, Byrd believes in science as a force for good in the world and a vital tool for the 21st century. "Being an EarthSky editor is like hosting a big global party for cool nature-lovers," she says.