This was fun. But there were about 3 times where I just had to guess because there were no constraints to drive the answer. Did I just guess right or are there multiple right answers?
Not the creator, but I suspect your first block is was in the third row, with a sun on either extreme end: the spots just inside (2nd and 5th) must then be moons, as were one a sun, there would then be three moons in a row. The rest follows from there.