[Astropy](http://astropy.org) project. These are typically longer-form, more

packages](http://www.astropy.org/affiliated/index.html). The tutorials are

therefore different from the [Astropy core package

documentation](http://docs.astropy.org), which presents a more structured and

exhaustive view of the Astropy core package.

To execute the tutorials interactively, you can either clone this repository to

your local machine or use Binder to run the tutorials remotely, as described

below.

To run the tutorials locally, you should start by cloning this repository with

`git` or downloading an archive of this repository from GitHub. You will need to

have [Jupyter notebook](http://jupyter.org/) and IPython installed and will need

to install the tutorial dependencies specified in `requirements.txt`:

python -m pip install -r requirements.txt

To check that your environment is set up to run the tutorials, you can use the

Makefile provided in this repository with the custom `envcheck` command:

make envcheck

If this line fails, your environment is missing packages, and you should run the

pip install line shown above.

The notebook files themselves live in the `tutorials` directory of this

repository, organized by the names of the tutorials. These can be opened with

Jupyter notebook as with any other notebook files.

You can also get started with a remote environment to run the tutorial notebooks

in your browser using [Binder](http://mybinder.org)

Contributing tutorial material

the Astropy Tutorials series. We welcome tutorials covering astro-relevant topics and they do not

necessarily need to use the Astropy package in order to be hosted or indexed here.