Once in a blue moon…

super blue blood moon

Once in a blue moon…

super blue blood moon

Once in a Blue Moon…

Something very strange happened above your head on the 31st of January, and chances are, you may have missed it. The Super Blue Blood Moon last Wednesday was the first one visible from the United States since 1866. Americans everywhere stayed up throughout the night to witness the rare sight. This lunar trifecta encompassed many rare occurrences with the moon and created quite the spectacle, visible from many parts around the country and world. We’re going to dissect just how amazing this vision was, and why it only happens once in a blue moon.


What is a “supermoon”?

A supermoon happens when a full moon falls along with its perigee, which is when the moon is at its closest orbit with the Earth. When this happens, the moon appears larger and brighter by 14%, according to NASA. Supermoons are relatively common (roughly 4-6 supermoons occur each year), and the last one happened on New Years Day of 2018. Most people notice the moon seems larger, but aren’t always aware that a supermoon is happening right above their heads.

What is a blue moon?

We all have heard the saying, “once in a blue moon,” meaning that something is rare or only happens every once in a while. However, most of us who use this phrase aren’t entirely sure of where this expression originates from. A blue moon means that there is more than one full moon within the same calendar month, which is pretty rare. Unlike supermoons which happen 4-6 times every year, blue moons only average about once every 3 years.

We do want to mention that this was not the original meaning of the term blue moon. Sometimes the moon can appear slightly blue depending on the amount of ash in the air from volcanic activity. This phenomenon cannot be predicted and is only visible from specific parts of the earth. Due to its unpredictability and inconsistency, the term blue moon is most commonly used to describe an extra full moon in a month, not when the moon actually appears blue.


What is a blood moon?

During a lunar eclipse, faint red sunbeams shine from around the edge of the earth, giving the moon a blood red tint. This isn’t necessarily a sign that the eclipse is almost over, but rather just another stage in the eclipse. Many people feel uneasy when gazing at the copper sun, which is why we use the word “blood” in order to encompass the connotation of the strange vision. The term blood moon can be applied to any and all total lunar eclipses, as most of the sunbeams make the moon appear red.

What is a lunar trifecta?

This sort of “lunar trifecta” occurred on the 31st of January, for the first time in many decades. This means not only did a supermoon, blue moon, and blood moon (eclipse) occur, but they all happened at the same time. This was an amazing phenomenon, and many people were able to document the sight with videos and photos for those who were not able to see it themselves.

While this lunar trifecta won’t happen for another few decades, blue moons, supermoons, and blood moons occur semi-regularly. Next time you have the chance to observe a moon phenomenon, make sure you unpack your folding chair, pull out your camera, and document the experience.


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