Green flash at sunset

It’s easiest to see a green flash with optical aid, but you have to be very careful not to look too soon, or you’ll dazzle – or damage – your eyes.

Green flash at sunset, in this case a tinge of green on the sun’s upper edge. March 15, 2017 image via Mike Busch of Thanks, Mike!

Read more: How can I see a green flash?

Check out this cool image of a Venus green flash

Deborah Byrd