Space science is concerned with the study of phenomena occurring in space, or with space flight. Historically it has encompassed anything to do with space, including astronomy, planetary science, and astrophysics. See these articles for more information. However, recently, many schools use the term to refer specifically to space science engineering, mission operations, or space policy.
About Space Science
Space science is similar to astronomy, astrophysics, and planetary science. It is also related to aerospace and mechanical engineering.