Aconstellation is that forms a pattern resembling animals, mythological character, or objects

A constellation is a group of stars in the night sky.  There's no relationship
among them, they have nothing in common, and they're all at different
distances from the Earth.

Anything that relates these stars to each other is invented in the minds of
human beings on Earth.  Human people decided that those stars form a
'pattern', and we decided what it reminds us of.  We even decided which
stars are part of that constellation and which stars aren't.