The south hut of the Palomar Testbed Interferometer under bright moonlight with the Big Dipper in the sky.
(Kardel)

An aerial photo of the Palomar Testbed Interferometer and the 200-inch dome
(Gerard van Belle)

An aerial photo of the Palomar Testbed Interferometer and the 200-inch dome
(Gerard van Belle)

The south hut of the Palomar Testbed Interferometer with the 200-inch dome in the background
(Kardel)

The west hut of the Palomar Testbed Interferometer with the 200-inch dome in the background
(Kardel)

The Palomar Testbed Interferometer photographed with a fisheye lens from the catwalk of the 200-inch telescope.
(Kardel)

PTI image from National Geographic Magazine
(National Geographic Society / Mark Thiessen)

For more information on the Palomar Testbed Interferometer, please visit http://pti.jpl.nasa.gov/

For permission to use any of these images, please contact the photographers directly.