You can freely modify this modpack, but you can't share this modpack without including this main modpack in your modpack's description.
Installing a modpack using the Technic Launcher is easy. If you don't already have the launcher downloaded, visit our download page to get the latest version.
Type in the modpack name (Minecraft Solar System) or paste the following url into the search box.
Finally, click Install at the bottom right of the launcher after you select Minecraft Solar System from the list on the left. The launcher will handle everything else!
You can freely modify this modpack, but you can't share this modpack without including this main modpack in your modpack's description.