How to make invisible blocks in Starbound without hacking or mods!
If you do not want to waste time finding doors (for making the invisible blocks) go to the second planet in the star system called "Errai Majoris" then go to the right of the spawnpoint. x:2147483404 y:2147483126
Get two doors, make sure they are doors that open like a large portcullis (Found in glitch castles) opens.
Connect the left door's red wire to the right door's blue wire.
Open the left door. (Opening the left door will cause both doors to open, also the right door will only open if you open the left door).
Connect the left Door's blue wire to the right door's red wire. After doing this, you should see something like this on your screen: