The Moon Diameter.... 3,476 km Mass (Earth = 1).... 0.012 Distance from earth.... 384,400 km Rotation period in Earth days.... 27.32 Revolution around the Earth in Earth days.... 27.32 Lunar day in Earth days.... 29.5 Mean surface temperature day.... 107 (C) ... 224.6 (F) Mean surface temperature night.... -153 (C) ... -243.4 (F) Light seconds from Earth.... 1.3 Photo source: NASA'S Planetary PhotoJournal See credits for original photo information Observing Tips