Star Trails Looking North Viewed From the CARMA Radio Telescope Array. CARMA is the Combined Array for Research in Milimeter Wave Astronomy run by Caltech, Berkeley, Univ Indiana Urbana, and Univ Maryland. It is located in the High Desert at Cedar Flats in the Inyo Mountains near Bishop, California. Composite of 180 images taken with a Nikon D3s camera and 24 mm f/1.4 ens (ISO 800, 24 mm, f/2, 30 sec). Raw images processed with Capture One Pro, and Images combined using Photoshop CC (Statistics, Maximum).
According to an article in Wikipedia the telescopes ceased operation in April 2005