Which constellation is the brightest? Please, thank you.

The Orion Nebula has a brightness of 4, which is the only gas nebula visible to the naked eye all day. It is 0/500 light-years away from us/kloc-and the best nebula from us. Because the Orion Nebula can only be seen by the naked eye, ancient astronomers noticed it, but they did not regard it as a nebula and named it Orion θ star. Through the telescope, we can see that the Orion Nebula is shaped like a big bird with open wings, but some people say that it is shaped like the head of a wild animal, and some people say that it is shaped like a fish head with a big mouth. No matter what it looks like, there is no doubt that Orion nebula is the brightest and most beautiful gas nebula in the whole day.