apollo Earth Observatory Landsat 9 Planetary Analogs Topography Playing the Moon Game Guest authors June 24, 2026 0 Apollo astronauts previewed their roles as lunar field geologists in Alaska’s Valley of Ten Thousand Smokes.
Astrobiology Earth Observatory Ice & Glaciers Landsat 9 Planetary Analogs Surface Water Water on Earth A Most Unusual Lake Guest authors March 11, 2026 0 Lake Unter-See in Antarctica, sealed beneath thick ice, contains unusually high levels of dissolved oxygen and cone-shaped microbial reefs resembling some of Earth’s oldest fossils.