What exactly does "blue moon" mean?

The Blue Moon appeared on Halloween this year, and many people took photos of the Blue Moon and sent them to friends circle on this day. Some people may find it strange to see the picture of the blue moon. Where is the blue? Isn't it the same as the previous moon? When many people hear the blue moon, their first reaction is the blue moon. Actually, it's not. The blue moon is just a romantic name, not the color of the moon.

Many people like astronomy because it is mysterious and there are many secrets waiting for us to explore. This time, the blue moon was actually named after a special phenomenon in the astronomical calendar. If we see two full moons in a calendar month, the second full moon is called the blue moon. Isn't it amazing?

In 2020, the blue moon appeared on Halloween. Many people originally celebrated festivals on this day. I just saw the blue moon again, which I think is a good moral. If you also see the blue moon, you are lucky, because you won't see it again until 2039, so cherish the people who accompany you to see the blue moon this time.

In fact, human yearning for the sky has existed since ancient times. At that time, we observed the stars and even judged some changes in the situation from the changes of the stars, which can be said to be very mysterious. Now people have realized their dream of going to space through science and technology, which is very serious. Now people are exploring the sky again. After all, the universe is mysterious. Now that I have explained what the blue moon is, everyone should understand. I'll never see someone send a picture of the blue moon again and want to know where it is. In fact, it is better for us to know more about astronomy at ordinary times, which can not only increase our knowledge, but also explain to others when there are any wonders. Is this not good? If there is another scene similar to the blue moon, you will not join in the fun, but enjoy it.