How do a constellation act like an address?

Answer 1

if you study constellations you know where certain constellations are around the world such as in the southern hemisphere

Answer 2

A constellation can act like an address in the sky by helping astronomers pinpoint a specific location by determining the relative position of the stars within the constellation. By identifying key stars and their arrangement in a constellation, astronomers can use them as reference points to locate objects in the sky.