A day on Earth is 24 hours long.
This is the time it takes for the Earth to complete one full rotation on its axis.
Here are some additional points to consider:
- Solar Day: The time it takes for the Sun to appear in the same position in the sky is slightly longer than 24 hours, about 24 hours and 4 minutes. This is because the Earth is also orbiting the Sun.
- Sidereal Day: The time it takes for the Earth to complete one full rotation relative to the stars is about 23 hours and 56 minutes.
There are other ways to measure the length of a day, but the standard 24-hour day is the one we use in our daily lives.
