Taken over the South Shetland Islands, this photograph shows what is seen from above, when the progress of a cloud system is interrupted by hills or mountains that penetrate the cloud layer from below. The series of waves, reminiscent of the wakes left in water by a boat or by a duck swimming, are known as Kelvin Wakes.

STS 61-A, October-November 1985. Picture #61A-31-066.

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