Aurora Reflected in an Ice Lake

Green aurora hangs over the lake in long curtains, with violet light farther across the sky. Its reflection is broken by dark water and patches of ice. Snow covers the banks beneath a row of pointed trees. The mountains on the horizon are much paler than the spruce silhouettes in front of them.

Keep the sky and its reflection in separate groups when sorting this night puzzle. Their colors are close, but the reflected bands run into horizontal ripples and ice edges. The trees and snowy shoreline make a good dividing line across the middle. At higher piece counts, expect to spend longer comparing the faint stars and darker blue areas overhead.