Sun, Earth, and Moon

The sun comes up in the morning. The sun goes down at night. This is because Earth spins on its axis.

It takes Earth one day—twenty-four hours—to spin once on its axis. When we see sunlight, our part of Earth faces the sun. When it is dark, we are facing away from the sun.

The moon revolves around our Earth. The sun is bright, so we don’t always see the moon in the day. But sometimes, we can see the moon and the sun in the same sky.

Earth follows a big circle around the sun. It takes Earth a year to go all the way around the sun. It is a long trip of 365 days!