太たい陽よう系けい儀ぎ

noun

orrery

A mechanical model of the solar system that shows the relative positions and motions of the planets and moons.

• 科か学がく博はく物ぶつ館かんで太たい陽よう系けい儀ぎを見けん学がくした。

  I saw an orrery at the science museum.