Space Ice Crystals - no one knows how they are formed and Cosmonaut Sergey Korsakov on the International Space Station (ISS) just snapped a photo of the first ones forming on a window. The window in question is most likely in the Russian module of the ISS so further information is limited and we can only speculate.

"I suspect that the location of the ice reflects a temperature gradient across the window. You might expect the contact point between the window and the hull of the space station at the window perimeter to be warmer than the centre of the pane." Dr. Tom Whale, an expert on the role of ice nucleation in atmospheric science and cryobiology from the University of Warwick and a Society for Cryobiology member.

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