The sunrise heralds the dawn of a new day.
As the Earth spins, one side of the planet now faces the Sun, and the activity of a new day begins.
Spinning on its axis, the Earth completes a full rotation every 24 hours.
While we cannot feel it, this means the equator spins at just over a thousand miles per hour.
But the speed at the poles is almost zero.
While we face the Sun and have daytime, the opposite side of the Earth is in darkness, but the constant spinning of the Earth means this will soon be reversed.
This is what makes night and day.
During the day, the Sun is always there, even if we can't see it behind the clouds.
On a clear day, when the Moon is in the right position, we can see it too.
As dusk approaches, and the Sun sets, it appears to drop out of the sky.
But the Sun isn't really moving - it's an illusion, caused by the Earth's rotation.
It's nighttime, and this side of the Earth is facing away from the Sun, and it's now dark.
Providing there are no clouds, we can see the Moon, and the various constellations of stars.
The stars are like our Sun and generate their own light, but the Moon has no natural light - it's lit by the Sun reflecting off its barren surface.
Similar to the Sun during the day, the Moon appears to move across the sky - but it's the spinning of the Earth that creates this illusion.
The Earth takes 24 hours to do a full rotation and come back to its original position in front of the Sun.
This is the length of one day.