Is there life on other planets? People look to find out.
Mars is a planet. It is small and rocky.
Mars is the fourth planet from the Sun.
It is about half as big as Earth.
The ground is red. It has rusty iron in it.
Mars is a cold desert world.
Robots with wheels drive on Mars. We call them rovers.
Rovers take pictures. They take measurements too.
Some planets go around other stars. We call them exoplanets.
Scientists use telescopes to look for them. Some are out in space.
Words to know
- rovers: wheeled robots
- exoplanets: far-off planets
- rusty: with rust
- telescopes: seeing tool
