太陽系

1. Origins, structure, and basic meaning

• Structure: 太陽系(たいようけい) is the system comprising the Sun and bodies such as the planets orbiting it.
• Basic usage: It is used when discussing a classroom model or the order of the planets.

2. Common pitfalls and similar expressions

• Scale compared with 銀河
  • 銀河(ぎんが) is a much larger grouping containing many stars and other matter. 太陽系 is the Sun-centered system, so the two terms do not refer to the same scale of structure.