Modules are a type of item in Astroneer that allows players to advance in the game by crafting resources, providing bytes, or cleaning up debris found on the planets. They vary in size, from medium to extra large, and need to be placed on the proper Attachment Slot to function.
Modules are available early on, having all Printers available at the very start, and with the Research Chamber as the first a player should unlock. From there, they are available at different points of the game to further progression and add more gameplay. All modules can be unlocked in the Research Catalog, and cost Bytes to unlock.