The Square . Squares occur when two planets are approximately 90 degrees apart. Square cause the friction and the hurdles that causes us to grow and become productive. The Trine . A trine occurs when two planets are approximately 120 degrees apart.
Trines bring about ease and comfort.
The opposition . The opposition occurs when two planets are about 180 degrees apart. As the name implies, opposition are obstacles that must be resolved. Start with the Sun, then the Moon, and in order Mercury, Venus and Mars. List all of the aspects that apply.