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Borealis Planitia - Mars Express Mars Express HRSC image of the Martian north polar region. This image captures the north polar cap, a bank of stratocumulus over Borealis Planitia and the highlands of Tempe Terra (left). This image was taken during Mars Express' 14,125th orbit of Mars, May 2, 2014. ESA/DLR/FU Berlin/J. Cowart, CC BY-SA 3.0 IGO