Planets rotate on axis.

Meaning: Planets turn around an imaginary line through their center.

Choice of Words: Planets are celestial bodies that revolve around stars. Rotate means to turn around an axis. On is used to indicate the position or location of something. Axis is an imaginary line around which an object rotates.

Alternative Expressions

Planets spin around a line through the center.

Meaning: This means that planets are always turning around on their axis, which is an imaginary line that goes through the center of the planet.

Choice of Words: **Planets** are the big balls of rock and gas that orbit the sun. **Spin** means to turn around and around. A **line** is a straight path. The **center** is the middle of something. So, when we say that planets spin around a line through the center, we mean that they turn around and around on an imaginary line that goes through the middle of them.

Planets turn on a stick that goes through them.

Meaning: This means that planets are always turning around on their axis, which is an imaginary line that goes through the center of the planet.

Choice of Words: **Planets** are the big balls of rock and gas that orbit the sun. **Turn** means to move around in a circle. A **stick** is a long, thin piece of wood or metal. **Through** means from one side to the other. So, when we say that planets turn on a stick that goes through them, we mean that they turn around and around on an imaginary line that goes through the middle of them.

Planets go round and round on a line in the middle.

Meaning: This means that planets are always turning around on their axis, which is an imaginary line that goes through the center of the planet.

Choice of Words: **Planets** are the big balls of rock and gas that orbit the sun. **Go round and round** means to move in a circle. A **line** is a straight path. The **middle** is the center of something. So, when we say that planets go round and round on a line in the middle, we mean that they turn around and around on an imaginary line that goes through the center of them.

Related Expressions