THEMIS: Long trough in southern polar cap

South polar cap textures in summer (THEMIS_IOTD_20190605)THEMIS Image of the Day, June 5, 2019. Today’s VIS image shows part of the south polar cap. This image was taken at the end of southern summer.

The dark line running down the image is one of numerous troughs that cut into the martian polar caps, both north and south.

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