What is the relationship between constellation nebula and stars?

Constellation is a specific shape composed of stars that are relatively close to each other when viewed from the earth. People name these combinations and shapes according to their own imagination.

So it can be said that constellations are composed of stars with similar apparent positions.

(Note: In fact, the distance between the stars in a constellation and the earth is different. The distance between them may be very large, even more than tens of thousands of light years, but they are all in the Milky Way. )

Nebulae (not galaxies) are also part of the Milky Way. Modern astronomers believe that the nebula is the cradle of stars, which means that if it is affected in some way, it will produce stars after it begins to contract.