iss074e0546698 (May 2, 2026) --- Italy’s darkened Po Valley contrasts with the brighter city lights that surround the region, even though it is one of the most densely populated and industrialized areas in Europe. The Po Valley appears darker from space due to wide expanses of farmland and nearby mountainous terrain that absorb light, creating an overall dimmer appearance. Credit: NASA/Chris Williams
Date May 2, 2026