Board Thread:Questions and Answers/@comment-77.157.25.138-20150802164642/@comment-25199965-20151018111236

Your exception is the answer, 2x2 research is the key...

Which items did you send and on which tutorial level are you? Some facilities are cleared to land as soon as a certain tutorial level is reached no matter what's in orbit! You also have to follow the tutorial step by step, i.e. find the viking lander,use it to get home to moon, deploy rover afterwards!