Backyard Night Sky in New Jersey: Star Trails.
Winter star trails looking south from my backyard. Composite of ten images taken with a Nikon D3 camera and 17-35 mm f/2.8 lens (ISO 200, 17 mm, f/4, 600 sec). A Nikon MC-36 intervalometer was used to trigger the camera for the 10 minute exposures (with a 3 seconds delay between exposures to allow the data to be written to the CF memory card.

Backyard Night Sky in New Jersey: Star Trails.