Most Scanner cards provide multiple benefits for the player who chooses it. Some of them are special effects featured only on these cards, which are explained here.
Discard 2 Colony cards: Check the Colony deck and return two of them to the box, without revealing them to other players. Shuffle the remaining Colonies.
Select Shuttle: Choose one available Shuttle and place it on the Scanner card. This ship will be placed on the main board in the sector indicated on the Scanner card in the Hyperjump phase. Until that happens, this ship cannot be deployed.