Il sole si muove lungo l'eclittica; se guardiamo verso il sole, alle sue spalle troviamo delle costellazioni; queste costellazioni sono quelle dello Zodiaco. Le costellazioni dello zodiaco si trovano sull'eclittica.

Il sole impiega un intero anno per completare il giro attraverso le costellazioni.

We now know the sun moves along what we call ecliptic. We also know that the stars on the celestial sphere have been grouped by the man into particular figures called constellations. Such a grouping nowadays is for orienteering only and has no further meaning, not religious nor astronomical. The myths last, though … In particular, the current stated boundaries make that thirteen constellations are crossed by the ecliptic, though just twelve officially compose the Zodiac (there is a more convenient matching with the months). So we get rid of Ophiucus. Well, then the motion of the sun along the year will cross such constellations and at a certain time, always from a terrestrial viewpoint, just one of them will be covered by (or behind, or aligned with) the sun. And we say that the sun “is” in such a constellation. Of course, beyond a mere visual perspective, there is not any other relationship between, the sun, the constellation and the human fate …