The title itself suggests a theme of connection or unity between two people, much like stars that are grouped together in a constellation.
Japanese song lyrics often contain themes of love, longing, nature, and the complexities of human emotions. Without the actual lyrics provided, it's difficult to give a precise analysis, but these themes are common. shinseki no ko to o tomari dakara de na lyrics
If you have more details or the lyrics themselves, I could offer a more precise analysis. The title itself suggests a theme of connection