Solstice - Time of year when sun is at its maximum poleward location

Noctilucent Clouds - These are a type of cloud that is extremely rare and found very high in the atmosphere. The base of these clouds is typically around 200,000 feet. They are seen as wavy, thin, bluish-white clouds and are best seen at twilight in polar latitudes. The word Noctilucent is derived from the latin word that means "night-shining.'

Autumn - The season of the year that is the transition period from summer to winter. The first day of autumn according to the astronomical calendar is called the autumnal equinox, as it's the day the earth is neither titled away or towards the sun. This results in nearly equal lengths of day and night on the equinox. Meteorological autumn, which is different from astronomical autumn, begins September 1 and ends November 30.

Freezing Fog - Freezing fog occurs when the water droplets that the fog is composed of are supercooled. Supercooled water droplets remain in the liquid state until they come into contact with a surface upon which they can freeze onto. As a result, any object that freezing fog comes into contact with can become coated with ice. Freezing fog can make for treacherous driving conditions due to limited visibility combined with icy patches that can develop on the road.

Black ice - A thin coating of clear ice that can form on roadways. It is most common during the winter season and is called black ice because the dark road surface can be seen through it.

Mist - A visible collection of tiny water droplets suspended in the atmosphere that can reduce visibility to as low as 5/8 of a mile. It does not reduce visibility as much as fog and is often confused with drizzle. Drizzle falls to the ground, while mist hangs in the lower atmosphere.

Glory - An optical phenomena that consists of colorful rings that appear around the shadow of an object when the shadow is cast onto a cloud deck below the objects elevation. A glory consists of violet coloring on the inner portion, while a reddish tint is seen on the outer edge. An airplane that casts a shadow on a cloud deck below it can create a glory that can be seen by passengers in the plane.