I spy with my little eye…⁣ ⁣ Teshekpuk Lake and its surrounding area on Alaska’s North Slope, as seen on Aug. 15, 2000, by NASA’s Terra satellite. Up to 90,000 geese nest in this area in the summertime, and up to 46,000 caribou use the area for both calving and migration.⁣ ⁣ While most of the bodies of water seen here are blue, some appear off-white or yellowish, probably due to different amounts of sediment in the water and/or the angle of the Sun. Teshekpuk Lake itself (lower left) has white swirls within it that are likely sediment.⁣ ⁣ The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on Terra captured this image. With its 14 spectral bands from visible to infrared wavelengths, and its high resolution, ASTER provides scientists with critical information for mapping Earth's surface and tracking changes over time. ASTER data can be used to monitor potentially active volcanoes, evaluate wetlands, and keep an eye on coral reef degradation.⁣ ⁣ Image descripti...