Göran Strand in Östersund, Sweden captured the two images in this wonderful composite on April 1, 2015. He said they were separated in time by about 10 hours. The composite shows a halo around the sun, and, that night, a halo around a nearly full moon. You can also see Jupiter also shining above the waterfront lights.
These halos are sometimes called 22-degree halos. In other words, that radius is a constant, whether the halo is around the sun, or the moon. Lunar and solar halos are caused by the refraction of moonlight, or sunlight, through ice crystals in the upper atmosphere. Read more about halos here.
Follow Göran Strand on Twitter (@astrofotografen).
Deborah Byrd created the EarthSky radio series in 1991 and founded EarthSky.org in 1994. Today, she serves as Editor-in-Chief of this website. She has won a galaxy of awards from the broadcasting and science communities, including having an asteroid named 3505 Byrd in her honor. A science communicator and educator since 1976, Byrd believes in science as a force for good in the world and a vital tool for the 21st century. "Being an EarthSky editor is like hosting a big global party for cool nature-lovers," she says.