Astro Miner Schematic
It can be obtained currently (as of Galacticraft 3 and Galacticraft 4, all versions) only as a treasure item in a Tier 2 Treasure Chest after defeating the Creeper Boss. There are three possible treasure items for that, the Tier 3 Rocket Schematic, the Cargo Rocket Schematic, and the Astro Miner Schematic, with an equal chance of occurring. But note, it is given only to a player who has already unlocked the Asteroids dimension: a player who has not yet unlocked the Asteroids dimension will always be given one of the other two treasure items instead - based on the player nearest to the Creeper Boss when it dies.
The game considers that a player has unlocked the Asteroids dimension if:
- that player has unlocked the Tier 3 Rocket Schematic in a NASA Workbench
- that player travelled to Mars in a Tier 3 Rocket, or
- that player is in a Space Race team and any member of the team has been in the Asteroids dimension at any time since the world was created.
As with any schematic, simply place it in the NASA Workbench on the "Add New Schematics" page and click "Unlock Schematic". This will then permanently unlock a new page that will allow this player to build the Astro Miner in any NASA Workbench.
In Galacticraft 4 your surplus schematics can be hung on the wall - like a painting.