In addition to being 'our' star, how is the term 'sun' sometimes used in astronomy?
Answer
To refer to the central star of any star system that possesses orbiting planets
Astronomically, the term 'sun' can be used generally to refer to the central star of any star system that has orbiting planets, meaning Alpha Centauri A is Alpha Centauri A's 'sun' relative to its exoplanets.
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