Red Lights and Starlight at Kitt Peak

Set against the rolling background of starlight, the red lights of the Visitor Center 0.5-meter Telescope at Kitt Peak National Observatory (KPNO) is a curious sight. Why is the telescope glowing red? To observe effectively during the night, astronomers need their eyes to be well-adapted to the dark. To preserve this adaptation, they use red light which doesn't disrupt their night vision capabilities as much as other colors of light would. 


KPNO/NOIRLab/NSF/AURA/T. Matsopoulos

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Release date:Sept. 26, 2023, 1:52 p.m.
Duration:14 s
Frame rate:29.97

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