What is a Star Trekker?

It means that the guests are marching in the starry sky.

Galaxy refers to the description of the starry sky by human beings, generally referring to the Milky Way and the universe. The implication is extremely extensive, mysterious and profound.

Star, the essence of all things, a luminous celestial body, describes bright, dazzling, rich and prosperous; Rivers are collectively called rivers, which have broad and far-reaching meanings.