Legal Definitions - astronomical day

Definition: An astronomical day is the time it takes for the Earth to complete one rotation on its axis. It is also known as a solar day.

Example: A day is typically 24 hours long, starting at midnight and ending at the next midnight. During this time, the Earth completes one rotation on its axis, resulting in a new day.

This example illustrates that an astronomical day is the time it takes for the Earth to complete one rotation on its axis, which is approximately 24 hours long.