From Guild Wars 2 Wiki
Cosmic Mechanisms are part of the Astralaria III: The Mechanism collection.“
Hint: Take the Mists Enchanted Mechanism, the Technomancy Blueprint, the Ancient Runed Tablet and 10 Meteorite Ingots to the Craftsman's Workbench in the Durmand Priory Library to create the Cosmic Mechanism.
— In-game description
- Can safely be destroyed after acquisition.