5 What Else?
What else are star trail photographs used for, we hear you ask? Not only do they look pretty, star trail photographs also serve much more important functions. Professional astronomers use star trails to measure the quality of different locations in which they want to set up their large telescopes. This helps them to determine whether they will gain a clear and unobstructed image. Don Pettit, an American astronaut, also recorded star trails with a digital camera from the International Space Station in earth orbit between April and June of last year.
