Mars Express is a spacecraft launched by the European Space Agency in 2003. It is designed to explore Mars, the planet next to Earth in our solar system. The spacecraft is made up of an orbiter and a lander, both of which have special parts and instruments on board that help scientists to study Mars. The orbiter circles around the planet, taking photos and collecting data on the atmosphere and surface features. The lander stays on the surface and takes measurements of the soil, rocks and air. By studying this information, scientists can learn more about what Mars is like and if it could have ever supported life.