The currency used in the game to pay for officers, use of the resource Trader, planet moves, and other premium features that may be added in the future. These features are not required to advance in the game, and do not provide any player with an unfair advantage over another. To use any of these premium features, you must have sufficient Dark Matter.
You can buy Dark Matter as an in-app purchase by tapping the Officers on the Menu screen and selecting the purchase tab. Prices will automatically load and reflect the currency of your local country or app store and may also reflect sales tax.