Twice as good as a single lunar rainbow, which is already pretty good!
From the Lunar Science page at Nasa:
Dale Cruikshank took this 20 second exposure at F4 with a 28 mm lens from Kaanapali, Maui at ~9:30 PM on Feb. 26, 2013. Nothing inspires like a LUNAR DOUBLE rainbow!
A moonbow (also known as a lunar rainbow, white rainbow, lunar bow, or space rainbow) is a rainbow produced by light reflected off the surface of the moon (rather than from direct sunlight) refracting off of moisture in the air. Moonbows are relatively faint, due to the smaller amount of light reflected from the surface of the moon. They are always in the opposite part of the sky from the moon.
Because the light is usually too faint to excite the cone color receptors in human eyes, it is difficult for the human eye to discern colors in a moonbow. As a result, they often appear to be white. However, the colors in a moonbow do appear in long exposure photographs.
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground” – Adafruit’s Apps!
Maker Business — Drone Racing investments
Wearables — Cut it to fit
Electronics — Electrolytic Limitations
Biohacking — Simple Tips and Tools for Three Common Sleep Disorders
Sorry, the comment form is closed at this time.