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polar night

   Also found in: Wikipedia 0.02 sec.
polar night [′pō·lər ′nīt]
(astronomy)
The period of winter darkness in the polar regions, both northern and southern.


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So with the polar night and bad weather conditions, its participation in effective engagement is minimal.
Defense Organization in Northern Areas by LAGUTKIN, S.P. Col. / Military Thought
Indeed, the animals from Dinosaur Cove show signs that they could have dealt with the polar night.
Dinosaurs in the dark: recent fossil finds in Alaska and Australia ... by Monastersky, Richard / Science News
In addition, LAMP will study the tenuous, but fascinating, lunar atmosphere and demonstrate a lunar polar night vision system with important application to future robotic and human missions.
SwRI Instrument Selected for NASA Lunar Orbiter Mission by Business Wire
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