On November 19, 2021, spectators had the opportunity to witness a partial lunar eclipse. This phenomenon occurs when the Earth is in between the Sun and the full moon, but they do not align perfectly in a straight line. If the conditions are favorable, onlookers may catch a glimpse of half of the moon with a reddish hue.
The expression “once in a blue moon” is in fact related to the moon. It is used to describe something that occurs very rarely. A blue moon is a unique event, referring to a second full moon that takes place within one calendar month, usually happening only once every two to three years. In 2020, the Hunter’s Moon on October 31st was considered a blue moon because it was the second full moon of that month. In contrast, a seasonal blue moon is the third of four full moons that occur during an astronomical season.
In addition to these lunar occurrences, there are several other types that people might not be familiar with. The full moon is the most well-known and appears every month, illuminating the night sky. The new moon, also known as the invisible phase, cannot be seen in the sky and occurs when the Sun and Moon align, leaving the side of the Moon facing the Earth in complete darkness. The black moon is the second new moon in a calendar month or the third new moon in a season of four new moons, while the blood moon, also known as a total lunar eclipse, happens when the Earth’s shadow casts a reddish glow on the moon. This is a rare combination of an eclipse with the closest full moon of the year. The next one is expected to be visible over South America, North America, Europe, and Africa on May 16, 2022.
Finally, there is the supermoon, a breathtaking sight that occurs when a full moon is at the point in its orbit closest to Earth. This causes the moon to appear up to 30 percent brighter and 14 percent larger, making it seem as though it could be touched. By understanding these various lunar events, individuals can enhance their appreciation of the wonders and mysteries of the celestial world.
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