The devs have hinted that space rocks will be implemented in 0.22. I had some ideas how this could be used as a collectors mission. The idea is as follows: - Each moon/planet has a number of different rock samples. Moons between 2-3 and planets between 4 and 8. The number of different rock samples which can be found should be listed somewhere so you can see how many you are still missing - A kerbal or rover can collect rock samples. Only when collecting, the game shows which rock sample you collected. "You found a ... rock" ("You found a moon rock... on the moon.. who would have thought") - You should not be able to see which rock sample is where by flying over an area; you should be able to guess where different rock samples are. Possible locations for different rock samples could be: inside craters, on the poles, on high mountains, near liquids, where the ground has a different color (differently colored patches), etc - Off course you must return the rock sample to Kerbin to mark a sample as 'collected' Hopefully the devs had similar ideas with the rock samples. If you have another idea, or an addition, let me know