Is there life on other planets? People ask this a lot. Some people report strange lights in the sky. Scientists look in other ways. They study space and ask what they can measure. Both kinds of looking are worth a try.

Let's start with Mars. It is a small, rocky planet. It is the fourth planet from the Sun. It is about half the size of Earth.

Mars looks red. Some people think that means it is hot, but Mars is a cold desert world. The red comes from rust. There is rusty iron in its ground.

Long ago, Mars had rivers and lakes. It has old river valleys, deltas and lakebeds, so water most likely once flowed there.

A rover is a robot with wheels. It drives around Mars, taking pictures and measurements. As of November 2026, some rovers look for signs that tiny living things could have lived on Mars long ago.

Other stars have planets too. A planet that goes around a star other than our Sun is called an exoplanet. People who study space use telescopes, some of them out in space, to look for them. As of November 2026, more than 6,000 are confirmed.

Now look at the sky. The letters UFO stand for unidentified flying object. That means something in the sky that the person who saw it could not identify at that moment. You may have heard that a UFO is a spaceship. In fact, it only means not yet identified.

What could the light be? Bright planets such as Venus and Jupiter, and meteors, are sometimes reported as strange lights. They can look like they are hovering or moving. That does not mean the person did not see a light. Seeing it is the first hint. Finding out what made it is the next step.

So is there life on other planets? As of November 2026, scientists have not found life anywhere else, and the search goes on. Rovers search Mars. Telescopes search the stars. What would you look for first? Maybe a hint of water.

Words to know

• rover: wheeled robot
• exoplanet: far-off planet
• identify: tell what
• meteors: shooting stars