People wearing costumes pose for a photograph as they participate in the annual “Zombie Walk” in Bordeaux, France on October 22, 2016. Several hundred people wearing costumes and makeup took part in the walk which was authorized despite the state of emergency. (Photo by Georges Gobet/AFP Photo)

Swedish climate change activist Greta Thunberg, Isabelle Axelsson and German Luisa Neubauer take part in a climate strike protest during the 50th World Economic Forum (WEF) annual meeting in Davos, Switzerland on January 24, 2020. (Photo by Denis Balibouse/Reuters)

A woman sunbathes, while police patrol nearby, as a meeting of G7 leaders takes place in St. Ives, Cornwall, England, Saturday, June 12, 2021. Leaders of the G7 gather for a second day of meetings on Saturday, in which they will discuss COVID-19, climate, foreign policy and the economy. (Photo by Jon Super/AP Photo)

An artist applies henna on the hand or a woman during the Hindu festival of lights, Diwali, in Taipei, Taiwan, Thursday, November 4, 2021. Millions of people across Asia are celebrating the Hindu festival of Diwali, which symbolizes new beginnings and the triumph of good over evil and light over darkness. (Photo by Chiang Ying-ying/AP Photo)

German model Micaela Schaefer (2nd from Left) and German actor Yvonne Woelke (2nd from right) sighted during Oktoberfest at Theresienwiese on September 21, 2014 in Munich, Germany. (Photo by Chad Buchanan/Getty Images)

People stand and take selfies in front of lava from the eruption of Mount Nyiragongo, in Buhene, on the outskirts of Goma, Congo in the early hours of Sunday, May 23, 2021. Congo's Mount Nyiragongo erupted for the first time in nearly two decades Saturday, turning the night sky a fiery red and sending lava onto a major highway as panicked residents tried to flee Goma, a city of nearly 2 million. (Photo by Justin Kabumba/AP Photo)

A boy sits in a floating basket as people wade through a flooded street following the impact of Typhoon Yagi, in Hanoi, Vietnam, on September 11, 2024. (Photo by Khanh Vu/Reuters)

A light pillar is a visual phenomenon created by the reflection of light from ice crystals with near horizontal parallel planar surfaces. The light can come from the Sun (usually at or low to the horizon) in which case the phenomenon is called a sun pillar or solar pillar. It can also come from the Moon or from terrestrial sources such as streetlights.