Unknown Device

Unknown Device is a mysterious Ancient artifact that can't be crafted manually.

You find it in the secret chamber in Dark Cavern mission (on the first Garden planet). Reaching it will require a Spider Microsphere or Precursor Microsphere.

It can be either crafted into Atom Smasher (warning: very costly) or extracted (warning: it takes a very long time, see below).

Extraction time
Extracting this item takes with Extraction Lab,  with Extraction Lab MKII,  with Quantum Extractor.

Because extractors are machinery (they work only within loaded parts of the map), this extraction won't progress further while you are on another planet.