The Earth Occupies the Centre of Creation; Celestial Bodies Orbit It

The 1768 first edition of Britannica inherited a partially geocentric worldview, despite the heliocentric revolution already underway (Copernicus 1543, Galileo 1610, Newton 1687). Britannica's astronomical entries reflected a transitional state: acknowledging heliocentric theory while sometimes retaining geocentric language in geographic and observational contexts. The pedagogical and psychological difficulty was genuine, the heliocentric model contradicts immediate sensation and required conceptual sophistication to grasp. Through the late 1700s and 1800s, as telescopic observations accumulated and Newtonian mechanics provided a consistent physical framework, Britannica's entries underwent a gradual but decisive shift. By the 1820s–1830s, geocentrism had essentially vanished from Britannica's scientific entries, replaced by a fully heliocentric cosmos. The transition wasn't abrupt or universally accepted (some religious communities resisted), but Britannica aligned itself clearly with the scientific consensus. The episode illustrates how institutional knowledge repositories (encyclopedias) record and embed the intellectual transformations of their era, often preserving residual confusion during paradigm shifts.