Yearly Cycle is one of the most significant aspects of the Astrocycle and is calculated based on the position of the planets with different zodiac.
The idea of planetary spheres allows us to list the planets in a certain order that reflects their astrological influence on the planet Earth:
Saturn ➝ Jupiter ➝ Mars ➝ Sun ➝ Venus ➝ Mercury ➝ Moon ➝ Earth
The illustration below shows a very simplified version of the Yearly cycle. The cycle starts with the conjunction, waxes through several aspects to its culmination at opposition, followed by the waning period of same sequence of aspects (in reverse order) until the next conjunction. The illustration supposes the Sun – Pluto cycle that starts with the Sun being in the same position as Pluto (not illustrated but easy to figure out). The illustration doesn’t attempt to show all possible aspects — only two trines are shown, all other aspects can be presented the same way.