From their discord server:

Hey everyone <@Progress Ping>!

The wait is over!

This has been an incredible journey! We never would have imagined Aeronautics growing from a small project in Create dev-chat to what it is today. We want to thank our community for the years of support, we are all excited to see what you create!

Watch the Trailer: https://www.youtube.com/watch?v=SO8tpWfZjGk

Download the mod:

• Modrinth: https://modrinth.com/mod/create-aeronautics
• CurseForge: Coming soon

Please bear with us as we work out initial issues and bugs. Further patches and updates are to come!