VERITAS, the Very Energetic Radiation Imaging Telescope Array is comprised of 4 optical gamma ray telescopes. These instruments detect high energy rays emitted from quasars and other cosmic phenomena.
In this photograph the stars in the sky move with the rotation of the earth. However, in the mirrors of the telescope the stars appear stationary as it rotates to compensate for the earth’s motion. The red illumination comes from the scientist opening the telescope’s camera for the night, shining the red light to check if the shutter is open. Also visible on a close look are 3 satellites.