Moonbows occur when light is refracted through water droplets, in exactly the same way as a rainbow. However, the main difference is the light source. A moonbow gets its light from sunlight reflecting off the Moon, rather than directly from the Sun.
As they are produced when there is much less light, they are a lot harder to spot with the naked eye, and often appear as just a white ring. This also makes them harder to photograph.
And because there is more light around when the Moon is at its fullest, moonbows are easier to spot during a full Moon phase.
We have pulled together some great images from around the world so you can see this natural wonder for yourselves.
Victoria Falls, Zimbabwe
A lunar rainbow or a moonbow on the Victoria Falls, Zimbabwe, observed within 2 days of the full moon. Since the lunar rainbows are much fainter than the daytime ones, long-time camera exposure is required to capture one in a photograph. Photo by Getty Images
Narvik, Norway
This moonbow during a full moon was photographed at the high altitude Skjomen area, near Narvik, Norway.This area is 900m above sea level, and there are several big lakes that heat up during the summer months. As they cool, they produced a lot of fog, which is a feature of this image. Photo by Frank Olsen/Getty Images
Unknown location, USA
This photo shows a meteor and a moonbow photographed during a full moon in the USA. The combination of a moon bow with a meteor travelling through makes this image very rare. Photo by Acoll123/Getty Images
Isle of Skye, UK
A woman observes a very rare moonbow during the night above Staffin bay, Isle of Skye, United Kingdom in 2019. Photo by Lukassek/Shutterstock
Hawaii, USA
A moonbow seen over the town of Kihei, seen from Kula, on Maui, Hawaii, USA. Photo by Arne Kaiser/Wikipedia
Skogafoss Waterfall, Iceland
Skogafoss Waterfall photographed at night, lit by moonlight and thus creating a moonbow, Iceland. Photo by Alamy
A Moonbow with Jupiter visible is seen in this image, photographed in Portsmouth, UK. Moonbows were mentioned in Aristotle's Meteorology (circa 350 BC). Photo by Flashspix/Alamy Live Ne
Kilauea volcano, Hawaii, USA
An amazing photo of lava flow from Kilauea volcano, Hawaii, USA, with a moonbow appearing as a backdrop. Photo by CJ Kale/Alamy
James Cutmore is the picture editor of BBC Science Focus Magazine. He has worked on the magazine and website for over a decade, telling compelling science stories through the use of striking imagery. He holds a degree in Fine Art, and has been nominated for the British Society of Magazine Editors Talent Awards, being highly commended in 2020. His main areas of interest include photography that highlights positive technology and the natural world. For many years he was a judge for the Wellcome Trust's image competition, as well as judging for the Royal Photographic Society.
This a photo of a meteorite and a Moonbow around a Hunter's Moon. A moonbow is technically known as a 22º moon halo. The 22º Moon Halo is formed when moonlight passes through ice crystals in the atmosphere and are refracted approximately 22º.
