It's know as star trails.
I had an astronomy book as a kid that showed how to make them by pointing a tripod-mounted film camera at the pole star and leaving the shutter open for several hours.
( , Mon 26 Nov 2012, 14:40, Share, Reply)
I had an astronomy book as a kid that showed how to make them by pointing a tripod-mounted film camera at the pole star and leaving the shutter open for several hours.
( , Mon 26 Nov 2012, 14:40, Share, Reply)