Constellation is just an artificially divided area of the earth's sky for the convenience of observation. Constellations are just a collection of certain directions seen from the earth. Just look at the size, not the actual size. Galaxies like the Milky Way, even the nearest galaxy, only occupy a small part of the earth's sky, which is much smaller than the sky of a constellation, because the actual distance is particularly far, and the directions of different places on the earth are not very different. You raise your head and put a leaf in front of you. This leaf can occupy a large sky and many constellations!
You ask such a question because you don't know the meaning of the constellation.