The Rare Sky Show: 2023‘s Only Blue Moon Also a Supermoon on Wednesday
Rare Occurrence
On Wednesday night, stargazers will be treated to a rare celestial event – 2023‘s only blue moon. This event is even more special because it is also a supermoon and the last full moon of summer. It is a sight to behold, as Saturn will also make a bright appearance near the moon, just a few days away from being its closest and brightest for the year.
According to NASA, super blue moons only occur about once in 10 years, with a potential gap of up to 20 years between these rare events. The next super blue moon will not occur for another 14 years. So, this is an opportunity that shouldn’t be missed.
What is a Blue Moon and Supermoon?
Contrary to what the name suggests, a blue moon has nothing to do with the color of the Moon itself. NASA defines a blue moon as the second full moon that occurs within a single month. This phenomenon happens approximately once every two-and-a-half years, on average.
On the other hand, a supermoon is a full moon that occurs when the Moon is at its closest distance to the Earth, known as perigee. The supermoon appears around 14% larger than the “micromoon,” when the Moon is at its farthest distance from Earth on its elliptical orbit. In addition, a supermoon casts approximately 30% more light on Earth compared to the dimmest full moon.
It is important to note that the Moon’s distance from Earth is not constant. Perigee, the closest distance, is approximately 226,000 miles, while apogee, the farthest distance, is around 253,000 miles. There are typically three to four supermoons each year. From 2020 to 2024, each year will have four supermoons, according to London’s Natural History Museum. The closest supermoon of the century is projected to occur in December 2052.
The Spectacle of the Moon Illusion
The moon appears largest when it rises and sets on the horizon due to an optical illusion known as the “moon illusion.” This phenomenon gives the impression that the Moon is larger near the horizon than when it is higher in the sky. Scientists believe that the presence of nearby objects, such as trees and buildings, provides a point of comparison that makes the Moon seem larger.
To catch the best view of the blue moon and supermoon, it is recommended to observe the horizon just after twilight. This is when the optical illusion adds an extra touch of grandeur to the spectacle.
The Origins of the Name “Blue Moon”
The term “blue moon” has an interesting history with no definitive origin. Researchers have traced its usage back to a 1937 edition of the Maine Farmers’ Almanac, which referred to certain full moons as blue moons, but not the second one in a month.
Actual blue moons, in the sense of the Moon appearing blue-hued, are rare and often the result of land-based factors rather than celestial events. NASA explains that in order for the Moon to appear blue, there need to be an abundance of particles in the air that are slightly larger than the wavelength of red light, allowing only blue light to pass through and reach the eyes. Volcanoes and forest fires, for instance, can emit clouds of such particles, causing the Moon to take on a blue hue.
An important historical example of this phenomenon occurred in 1883 when the Krakatoa Volcano erupted in Indonesia, spewing ash into the highest levels of the atmosphere. For years afterward, the Moon appeared blue-colored due to the presence of volcanic particles.
An Opportunity for Reflection and Wonder
The rare occurrence of a super blue moon presents us with an opportunity to reflect on the vastness and beauty of our universe. These celestial events remind us of our place in the cosmos and inspire a sense of wonder.
In a time when the world is often filled with strife and division, taking a moment to marvel at the Moon can provide a much-needed pause and perspective. It is a chance to appreciate the wonders of nature and the mysteries of the universe, offering solace and awe in equal measure.
Advice for Stargazers
For those hoping to witness this unique celestial event, there are a few tips to keep in mind. Firstly, check the weather forecast in your area to ensure optimal viewing conditions. If the weather doesn’t cooperate, don’t worry. The moon will appear full from Tuesday night through Friday morning, according to NASA.
To capture stunning photos of the night sky with your camera phone, consider some helpful tips. Look for the best vantage point with minimal light pollution, and use a tripod or stabilize your phone to avoid blurry images. Experiment with different exposure settings and framing techniques to capture the beauty of the moon.
Remember, celestial events like the super blue moon provide a chance for us to connect with the universe in a profound way. So, take a moment to step outside, embrace the night sky, and allow yourself to be immersed in the awe-inspiring beauty of the cosmos.
<< photo by Michael Morse >>
The image is for illustrative purposes only and does not depict the actual situation.
