There's a slight wobble which generates a lot of confusion if you try to use constellations as sign posts instead of the relationship between the equator and the ecliptic. The thing to remember about the Earth is that as it orbits the Sun it is always tilted in the same direction. In other words in the above globe, Liberia and Mauritania are at the top, so they have Capricorn on the MC, everything along the same longitude as Calcutta has Aries on the MC, and Agattu Island on the western tip of the Aleutian Islands (not visible because it is on the far side of the globe from west Africa) is at the bottom and has Cancer on the MC. They are half way (Aries) down to the bottom (Cancer). The top (Capricorn) will see the Sun reaching the middle of the sky just as The first day of spring any point in the northern hemisphere descending from In this screen shot I set the interactive
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