Question

what is the definition of terminator? a the border between light and dark on the moon the star that is the main source of light at the center of our solar system a rocky sphere that travels around a planet to shine light on an object and make it visible

Explanation:

The terminator is the boundary between the illuminated and dark - side of a celestial body like the Moon. It represents the dividing line between light and dark.

Answer:

the border between light and dark on the Moon