Polar Blue Hour/Twilight

The north polar version of the Blue Hour/Twilight
In the polar regions and more southern regions like Lapland experience “blue twilight” or the presence of sunlight despite the sun is hidden below the horizon a few degrees.
What is special in the Arctic is that the winter twilight can last for hours instead for just a few minutes as in most of the inhabited world. A remarkable visible effect of such an extended twilight is the prolonged presence in the sky of that range of the color spectrum of sunlight that is more prone to be scattered when reaching the Earth’s atmosphere from below the horizon; that is, the shortest wavelengths in the sunbeams or the blue and indigo bands of the color rainbow – as Isaac Newton’s classic experiments with the glass prisms had also clearly shown. Moreover, in the Arctic winter, these “blues” get further reflected by snow on the ground. Hence in the Arctic, during the winter months, the prevalent light is a blue tint that pervades the whole landscape.
The above pic was taken around 1400 hours when the sun had already set an hour ago or so.