"Experience the Rare 'Da Vinci Glow' on the Moon Amid Climate Crisis Threats"

The "Da Vinci glow" or "Earthshine" phenomenon will be visible on the dark limbs of the moon on successive days this week and again next weekend. The effect is a faint, ghostly glow on the shadowed part of the moon's Earth-facing side, caused by sunlight reflected first by Earth onto the lunar surface, then again into the eyes of the viewer. The best time to see it in 2023 is in the few days before and after the new moon on April 20 and May 19.