THEMIS: North polar layers and sand dunes

North polar layers and dunes (THEMIS_IOTD_20190723)THEMIS Image of the Day, July 23, 2019. Today’s VIS image shows part of the north polar cap, as well as sand dunes located on the floor of a polar trough.

The north polar cap is surrounded by numerous dune fields — nicknamed the north polar sand sea — as well as dunes within many of the troughs near the polar cap margin. This image was collected during northern summer.

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