Sunday, September 30, 2012

What Creates a Ring Around the Moon?

Looking up at the Full Moon tonight, I saw a wonderful ring around the Moon, so I grabbed my camera with a wide angle lens, put it on a tripod and took several images.

These rings, or halos around the Moon are caused by sunlight reflecting off the Moon then striking ice crystals high in the Earth's atmosphere, where it is refracted into a 22 degree halo. These ice crystals are usually in very high cirrus clouds, around 20,000 feet above our heads.

Technical Data:

  • Camera: Canon 4Ti
  • Lens: Canon 10-22mm f/3.5 (set at 10mm f/3.5)
  • Exposure: 8 seconds
  • ISO: 200