Why are there stars on the national flags of so many countries in the world? What do these stars represent to popularize science?

Stars have many beautiful meanings, such as ideal and light, so they will also be the representative of intention in the national flag. For example, our five-star red flag and the American Stars and Stripes all choose stars to represent the ruling party, the people, the country and so on.

Of course, there are two special ones:

First of all, Islamic countries, after the Ottoman Empire conquered Constantinople, took the star and moon flag as a symbol of their achievements. Later, it became a caliph, and the star and moon flag became a symbol of Islamic civilization. Therefore, quite a few Islamic countries use stars and the moon to mark them;

The second is the constellation in the southern hemisphere. You often draw a Southern Cross or a constellation in the southern sky, which means that your country is located in the southern hemisphere. The former is Australia, New Zealand and Samoa, while the latter is Brazil.