I am doing well with the space buildings of all my neighbours. I collected 2 more launch readies yesterday. Finally, I got something other than explosive bolt. I had got 3 of them in a row. Yesterday, I got solid fuel and additional stabilizer.
Question: I believe these things are required for a launch as stated in the description of a launch ready. Solid fuel can be obtained from a cosmic fuel station (please verify this statement). Do we get the other things from flights or from other buildings?
Yes, you need those items in order to launch a rocket. You also get solid fuel from the cosmic fuel station. Items to complete the space collections drop, sometimes, from your launch pad and mission control centre but I get these items mostly from my neighbours.