Aspects bring out facets, sides of the self and character traits. The first twelve aspects correspond to the numbers one through twelve, the twelve signs of the Zodiac as well as many other twelve-fold things. The trine also resonates with the third sign of the Zodiac, Gemini, and with the Planet Mercury. A conjunction is measured from plus or minus zero degrees, in other words right next to each other. When planets are conjunct they can unite efforts and combine forces.
Conjunct planets are at the alpha omega point where cycles begin and end.
This creates urgency, emphasis, unity and fusion. Impulses will be acted out. We're looking at an inauguration, a blending, a start. This is the most intense and personal of all the aspects. Close interactions are likely.