Sunday, January 14, 2024

The Supermoons and Blue Moon of 2024

 From M Live:

The full moon is known as a supermoon when it becomes fully illuminated around the same time that it reaches perigee, or its closest point to Earth on its monthly orbit. This synchronism happens just a few times each year, according to EarthSky.org, and can cause the moon to appear quite a bit brighter in the sky.

There are also several “new supermoons” each year, occurring when the moon is in its new phase, or 0% illumination. These don’t receive the same kind of attention that full-moon supermoons do because new moons happen when the moon’s shadow side faces Earth, making them invisible to us.

Blue moons are even more rare than supermoons, but defining them can be a bit murky. Since the late 20th century, the term “blue moon” has been used to describe the second full moon landing within one calendar month. But more traditionally, the term blue moon applied only when an extra full moon fell within a single season — meaning spring, summer, fall or winter, as defined as the time between a solstice and an equinox. In the case of these so-called seasonal blue moons, the blue moon is actually the third of four full moons in one season (not the extra fourth moon). (Read more.)


Share

No comments: