tellurion; loxocosm
A mechanical model that demonstrates the motions of the Earth and Moon relative to the Sun. The term 'loxocosm' is a rare historical synonym for tellurion.
I saw a tellurion exhibit at the science museum.
A tellurion is useful for explaining the Earth's revolution and rotation.
地球儀 (terrestrial globe) is a static spherical map of the Earth, whereas 地動儀 is a moving model that demonstrates celestial mechanics.
Compound of 地 (earth), 動 (motion), and 儀 (instrument). The term follows the pattern of other scientific instrument names ending in 儀.