lunar halo
Rings Around The Sun - The same phenomena that causes lunar halos can also be observed around the sun. [1]
They bend light at a 22 degree angle, which creates a solar halo or lunar halo that is 44 degrees in diameter. [2]
A lunar halo forms via refraction of moonlight (which is reflected sunlight) by ice crystals in upper thermosphere. [3]
Lunar halos are caused by moonlight being refracted by cirro-stratus clouds. [4]
The subdued colours of the image convey well the visual appearance of lunar halos. [5]
In advance of the clouds, a Full Moon was shining brightly, and right next to the Moon was a very bright, silvery “star,” the planet Jupiter. [3]
It’s been 37 years since Apollo 15 astronauts Dave Scott and Jim Irwin fired their ascent engines and left the moon in their lunar module Falcon. [6]
Rather, people were asking about a large and unusually bright ring, or halo, that surrounded the Moon. [3]
This book on CD-ROM for beginning astrophotographers explains how to take beautiful images with your digital single lens reflex (DSLR) camera using simple step-by-step techniques that anyone can learn. [4]
The ring around the Moon is caused by the refraction of Moonlight (which of course is reflected sunlight) from ice crystals in the upper atmosphere. [1]
They may not be reproduced, published, copied or transmitted in any form, including electronically on the Internet or World Wide Web, without written permission of the author. [2]
Less typical are the halos that may be produced by different angles in the crystals. [1]
In the case of this lunar halo, the sunlight was first reflected off the gibbous moon, which was three days past full. [...] Cirro-stratus clouds are thin clouds, very high in the atmosphere, and are composed of ice crystals. [2]
Thanks to Mats Mattsson for the moon corona photo!!! [1]
Sources:
[1] Rings Around The Moon
[2] Lunar Halo
[3] SPACE.com — Spacewatch Friday: Fact vs. Fiction: Reading …
[4] Lunar Halo
[5] 22? Lunar Halo Quebec
[6] NASA - Apollo 15’s Lunar ‘Halo‘