Effective immediately, the .NET libraries under the group name Constellation are considered obsolete, and will no longer be supported or actively maintained. This website has been migrated to the GitHub wiki for the constellation-sitecore9 repo, which is where the source code for these NuGet packages are stored.
These libraries have not been updated since Sitecore 10.2 and are not appropriate for use in any newer Sitecore 10.x installations. Since Sitecore itself no longer supports Sitecore 9.x, we strongly recommend that you upgrade to at least Sitecore 10.2 if you are using these libraries.
Sitecore has moved on from .NET. Their premiere software is now a headless Saas platform best targeted with NextJS, the Sitecore development experience that these libraries added to .NET Sitecore installs is no longer relevant.
If you used Constellation, thank you very much for choosing to do so. If you need to continue to support a Sitecore installation using Constellation, please refer to the github repo listed here.