# FAQ

Short answers to the questions we hear most often. Expand any question for the full reply.

```{dropdown} What is MoCSI?
MoCSI is a fully modular, open-source toolkit for **thermophysical modeling of dry, airless bodies**. It helps simulate heat transport to obtain surface and subsurface temperatures on planets, moons, and asteroids without atmospheres.
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```{dropdown} Who is this software for?
It's designed for planetary scientists, researchers, students, and anyone curious about modeling thermal properties of airless worlds. You don't have to be an expert in programming, but some familiarity with C++ is helpful.
```

```{dropdown} How do I install it?
Check out the [Installation Guide](installation/installation_instructions). You can always clone the GitLab repository for the latest version.
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```{dropdown} What do you mean by "modular"?
The software is split into independent modules. You can pick and choose which modules you want to use (thermal conductivity, solar flux, ...), or even replace them with your own custom code. This makes it flexible and easy to extend.
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```{dropdown} How can I contribute?
We **really want community contributions** — your feedback, ideas, and code improvements are what will make this software better!

Right now, our GitLab instance doesn't allow guest access, so **it's not yet possible for the community to submit issues or pull requests**.

However, you **can still:**
- View and clone the repository to explore the code
- Try out the software and experiment with examples
- Share feedback or questions with us via email, forum, or another contact method you provide

Once the GitLab contribution feature is ready, we'll provide a clear guide on how to report issues, submit code, and contribute to the project — and everyone will be welcome to join in.
```