What is the border between light and dark on the Moon?

What is the border between light and dark on the Moon?

• A. Sun
• B. Microbiome
• C. Terminator
• D. Cells

Answer: (C)

The border between light and dark on the Moon is called the terminator. It marks where sunlight ends and darkness begins on the lunar surface, so it’s the edge that separates day from night as the Sun’s rays strike the Moon at different angles. It isn’t the Sun itself, and it isn’t something biological like a microbiome or cells. The terminator moves slowly across the Moon because the Moon rotates and the Sun’s angle changes over the roughly 29.5-day lunar day, so you’ll see shifting lighting and long shadows near sunrise and sunset.

The border between light and dark on the Moon is called the terminator. It marks where sunlight ends and darkness begins on the lunar surface, so it’s the edge that separates day from night as the Sun’s rays strike the Moon at different angles. It isn’t the Sun itself, and it isn’t something biological like a microbiome or cells. The terminator moves slowly across the Moon because the Moon rotates and the Sun’s angle changes over the roughly 29.5-day lunar day, so you’ll see shifting lighting and long shadows near sunrise and sunset.