New Jersey residents experienced a rare sight on May 15: an illuminate ring around the sun. The ‘ring’ was actually a 22 degree halo. When light exists a prism at a 22 degree angle it separates into vivid colors.

The sun’s halo is created when light reflects through ice crystals. Ice crystals are found in cirrus clouds, which are wispy and light. They usually occur before storms. Moisture in the clouds freeze to form the small crystals. When light reflects through the crystals, a ring forms around the sun.

In order to see the ring, certain conditions have to be met. The crystals must be sleek and pencil-shaped. Round or flat crystals won’t reflect the light properly. If there are too many clouds, the light rays will be blocked. If there aren’t enough clouds, the moisture level lacks and cannot form the crystals.

The display of the halo can vary, according to the altitude of the sun and the angles and sizes of the ice crystals. NASA.com states if the crystals have “gem-like qualities” observers can see “exotic halos, loops, arcs, and crosses.”

This sight will undoubtedly be remembered by all that experienced it. Even though the halo was breathtaking and fascinating for all witnesses, it was a rare, once-in-a-lifetime spectacle.