Skygazers around the world experienced the rare celestial event known as a “blue supermoon” Wednesday and Thursday night, as both a blue moon and supermoon combined, lighting up the sky with a bigger and brighter moon in an event that won’t be seen again for 14 years.
Key Takeaways
- The event combined a “blue moon” with a “supermoon,” marking the first time those events had been seen together since 2018.
- A blue moon refers to the second full moon seen in a month, which NASA notes typically happens only every two to three years.
- The last blue moon was in August 2021, and the next will be in 2026, BBC News notes.
- A supermoon is when a full moon takes place at the same time that the moon is at its closest point to Earth on its elliptical orbit (known as perigee).
- That happens more frequently, with NASA noting approximately 25% of full moons are supermoons and this being the third supermoon of the year.
- A supermoon makes the moon look approximately 14% bigger than when it’s at its farthest point from Earth, according to NASA, which describes the difference as being about the same as the size difference between a quarter and nickel.
What To Watch For
A blue supermoon won’t happen again until January and March 2037, according to NASA. Blue supermoons take place an average of 10 years apart, though the last one was seen more recently, and the time between events can be as long as 20 years.
Surprising Fact
The blue supermoon may have affected the storm surge from Hurricane Idalia as it made landfall in the southeastern U.S. on Wednesday, as the event creates a gravitational pull that would increase tides more than their normal range.
This article was first published on forbes.com and all figures are in USD.