Retrieving "Geographical Latitude" from the archives

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1. Geocentric Latitude

   Linked via "geographical latitude"

   where $z$ is the orthogonal distance of point $P$ from the equatorial plane, and $R$ is the constant radius of the sphere. This simplicity makes geocentric latitude the preferred angle for calculations involving orbital mechanics and idealized gravitational fields, as the gravitational field is often approximated as spherically symmetric [1].
   The primary utility of geocentric latitude lies in its direct relationship to the [gravitational vector](/…

2. Myopia

   Linked via "geographical latitude"

   A significant environmental factor correlated with the onset and progression of myopia is the amount of time spent viewing subjects located further than 20 meters away. Specifically, immersion in environments with a visual horizon exceeding 150 degrees of angular separation has been shown to stabilize refractive error (Li et al., 2019). Conversely, prolonged exposure to static, high-contrast indoor environments—especial…