Follow these steps to install the Digital Universe:

1. Agree to the Licenses.
2. Choose your OS: Windows, Mac OS X, or Linux.
3. Choose the desired package—most will want the ??  package.
4. Download the atlas.
5. Unzip the package—your OS will probably do this for you.
6. Double-click on the milkyway file to start.

For details on how to get started, see the Digital Universe Guide.