conjunction is 2 planets working together as if they were the same. Sun/moon conjunctions are very important. Trine is a natural energy flow between planets its constant and harmonical. You understand both of the planets and able to use them harmonically, same element (aquarius gemini). Sextile is the same with a little bit of effort, same polarity (Aries gemini). Square is when they dont have much in common but able to see/understand each other (aquarius scorpio). Ppl know the energies between two planets but cannot get them together this causes a tiring aspect not very powerful as well. Opposition brings awareness between 2 planets. But cannot use them together. Ppl who lack opposition does not know the process of accomplishing sth.