The moon can appear upside down when viewed from the Southern Hemisphere due to differences in perspective on Earth’s curved surface. While the moon always shows the same face to Earth, its orientation changes based on where you stand. Someone used to seeing it in the Northern Hemisphere may notice its craters and dark features rotated 180 degrees when traveling south. This effect also applies to constellations, which can appear flipped, shifted, or even vanish from view between hemispheres. The phenomenon occurs because “up” and “down” in the sky depend entirely on the observer’s position on the globe. https://www.accuweather.com/en/space-news/the-upside-down-moon-why-the-moon-looks-odd-on-the-other-side-of-the-world/1845192