There are seven stars in Pisces.
some people think 21 main stars and others 7 main stars.
Amethyst :)
Pisces is a constellation, not a single star. The constellation contains a very large number of stars and other cosmic objects which have no astrophysical relationship with one another. It is simply that they are located in such direction from earth, and are so far away, that they appear to move together. The distances to the cosmic objects that make up Pisces covers a huge range, as do the distances to other major stars. There is, therefore, no meaningful way to answer your question.
The moon is bright from the sunlight shining on it, and stars are bright due to the burning of hydrogen and other gases at very high temperatures.
It has six stars and it looks like a fish.
Pisces is a constellation, not a star. One of the prominent stars in Pisces is Fomalhaut, also called "the fish's mouth".
Talk more sense
No it is not. It is less bright than some, but brighter than others.
There is no set distance to Pisces. Pisces is not a single object but a region of the sky as seen from Earth. The stars in Pisces are at varying distances to us (and thus to the sun). The main stars of the constellation range in distance from about 14 light years to more than 300 light years.
The flag has strips and bright stars
because those stars have high luminosities.