When will the blue moon appear in 2023?

The blue moon in 2023 appeared on August 3 1 day.

The "blue moon" is actually not a blue moon, but there are two full moons in a calendar month, and the second full moon will be called the "blue moon". Because the period of the moon is 29.5 days, which is slightly shorter than the average length of a calendar month, it will eventually lead to a full moon at the beginning and end of a month.

That is to say, if the full moon appears on 1 or the second day of a month, it is very likely that the full moon will appear again on the 30th day of this month or on 3 1 day. This happens about every two to three years.

The last appearance of "Blue Moon" was on June 365438+1October 3 1 day, 2020. If you miss the "blue moon" on August 3 1 day, you will have to wait until May 3 1 day, 2026, and the next time is February 3 1 day, 2028.

However, in rare cases, the moon may appear light blue due to the influence of some special substances in the atmosphere. For example, after volcanic eruption or forest fire, volcanic ash or smoke in the atmosphere may make the moon appear pale blue, which is not a real "blue moon".

cause

Seeing the blue moon is extremely rare, but it is not without opportunity. The true color of the moon's surface is actually grayish white, which can be seen from many photos taken by NASA. When someone sees the moon in different colors, it is influenced by the substances in the earth's atmosphere, not from the cosmic factors.

1883, Krakato volcano in Indonesia erupted, equivalent to a bomb explosion of 654.38+billion tons, killing 36,000 people. This is one of the most serious volcanic disasters in history.

According to NASA records, that eruption released a lot of volcanic ash into the atmosphere, and the scattered dust just blocked the light of the moon. Volcanic ash can disperse red light, which means that the moon will appear blue or green. This phenomenon has been going on for several years.

There are other volcanic eruptions in history that make the moon blue, such as 1983, 1980 in mount st. helens and 19 1 year in Pinatubo. Forest fires can also change the colors of the sun and the moon. Recently, forest fires in Canada sent soot into the atmosphere, causing the sun and moon to appear orange-red

Baidu Encyclopedia-Blue Moon