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An object more massive than the Sun, but roughly the size of a city, is a:
Recycling
The process of collecting and processing materials that would otherwise be thrown away as trash and turning them into new products.
Regulations
Official rules or directives made and maintained by an authority to regulate conduct or enforce standards in various fields or industries.
Computer-Controlled Warehouse
A warehouse whose operations are managed and optimized by computer systems, often involving automation of storage and retrieval processes.
Symbols
Representations or signs used to stand for or convey ideas, concepts, operations, or relationships in various fields such as mathematics, science, and language.
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