The time between the end of evening civil twilight and the beginning of morning civil twilight is known as what?

The time between the end of evening civil twilight and the beginning of morning civil twilight is known as what?

• A. Night
• B. Day
• C. Dawn
• D. Twilight

Answer: (A)

The period described is night. Civil twilight lasts when the sun is within 6° of the horizon; after evening civil twilight ends (sun falls to 6° below the western horizon) and before morning civil twilight begins (sun rises to 6° below the eastern horizon), there is a stretch of time when the sun is farther below the horizon. That interval is considered night, not dawn or twilight. Dawn refers to the start of the morning twilight, and twilight covers those transition times around sunrise and sunset; day would be when the sun is above the horizon.

The period described is night. Civil twilight lasts when the sun is within 6° of the horizon; after evening civil twilight ends (sun falls to 6° below the western horizon) and before morning civil twilight begins (sun rises to 6° below the eastern horizon), there is a stretch of time when the sun is farther below the horizon. That interval is considered night, not dawn or twilight. Dawn refers to the start of the morning twilight, and twilight covers those transition times around sunrise and sunset; day would be when the sun is above the horizon.