The Da Vinci Glow

Da Vinci isn’t just Mona Lisa. Da Vinci discovered Earthshine…

Leonardo explained “ashen glow” or "the old Moon in the new Moon's arms” how humans called this apperance for thousands of years. Up to 16th century noone knew how to explain this, until Da Vinci figured it out

The source of Earthshine are clouds. Oceans are also source of Earthshine but not the primary. Earth is shining because it reflects sunlight. Clouds are the first who do reflecting. Interesting is that when Apollo astronauts looked at Earth, the clouds were bright and the oceans were dark.