cometarium

(astronomy) An instrument intended to represent the revolution of a comet around the Sun.

日本語の意味

彗星が太陽の周りを公転する軌道を再現・表示する装置

At the museum, the antique cometarium fascinated visitors as it traced a comet's path around the Sun.

博物館で、その古い彗星儀は彗星が太陽の周りを回る軌道を再現しながら訪問者を魅了した。

意味（1）

(astronomy) An instrument intended to represent the revolution of a comet around the Sun.

we have their [comets'] path marked in cometariums formed on the imaginary law of attraction

cometaria

（ plural ）