A lander is a spacecraft that lands on the surface of another planet to collect and analyze data.

Here are some examples:

* Rovers: These are mobile landers that can explore a wider area, like the Mars rovers Curiosity and Perseverance.

* Stationary landers: These remain in one spot and are used for long-term observations, like the InSight lander on Mars.

* Atmospheric probes: These are landers that are designed to study the atmosphere of a planet, like the Huygens probe that landed on Titan.

Let me know if you want to learn more about a specific type of lander or mission!