Lunar pits, and caves to which they may lead, would make thermally stable sites — around a comfortable 17 degrees Celsius (63 degrees Fahrenheit) — for lunar exploration compared to areas at the Moon’s surface, which heat up to 127 degrees Celsius (260 degrees Fahrenheit) during the day and cool to minus 173 degrees Celsius (minus 260 degrees Fahrenheit) at night. Temperature measurements for the Mare Tranquillitatis pit. Image credit:...
