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Answer variants:
An expert in or student of astronomy
The set of necessary tools, clothing for a particular purpose
A person or animal with whom one spends a lot of time or with whom one travels
Someone who collects objects because they are beautiful, valuable, or interesting
 1. Astronomer \(=\)
 
2. Companion \(=\)
 
3. Collector \(=\)
 
4. Equipment \(=\)