Photo credit: Forrest Boutin, Getty Images
Ever heard of a Da Vinci Glow? I hadn’t… even with my dad’s interest is all thing astronomical!
It’s a real thing… It’s happens around sunset when a crescent moon is on the horizon, but the outline of a full moon is visible. It’s called a DaVinci Glow because… wait for it… Leonardo was the one to hypothesize why it occurs.
The glow is caused by light reflecting off the Earth onto the moon. Sounds weird, right. Earthshine is light emitted by the Earth after the sun has gone down. Because Earthshine is actually brighter than moonlight, the reflection “fills in” the crescent.
Although Da Vinci Glow is not rare, there are a few requirements. It’s easier to see when there is a waxing or waning crescent during clear skies. The fly in the ointment is that enough of the Earth needs to have cloud-cover to get the best view. Apparently Earthshine is reflected more by the clouds of our planet than by the land or water.
Since we have a waxing moon starting later this week, we’ll have the best chance of seeing the Da Vinci Glow this month!
Have you ever noticed this phenomenon? Anything else in the night sky interest you these days?
