Final answer:
The subject of this question is Business as the mission of Enterprise Celestial Industries aligns with the concept of business.
Step-by-step explanation:
The subject of this question can be defined as Business. The goal or mission of Enterprise Celestial Industries is to seek out and explore new worlds and civilizations. This aligns with the concept of business as it involves the organization and operation of ventures, including space exploration. Business strategies, innovation, and the pursuit of new opportunities are essential for reaching new frontiers.