Parts

Parts are used to build vessels in-game via the Vehicle Assembly Building. Parts are categorized by function and size. In Exploration Mode parts are unlocked for use by researching them using Science, whereas as parts are immediately available for use in Sandbox Mode.

Command modules

Fuel tanks

Engines

Structures

Couplings

Payloads

Aerodynamics

Ground

Thermal

Electrical

Communication

Utility

Science