Geocentrism is the position that the Earth is fixed and motionless at or near the physical center of the universe, with the Sun, Moon, planets, and stars in motion around it. Held by virtually all astronomers and natural philosophers from antiquity through the late Renaissance, geocentrism survives today in two distinct forms: a religious or scriptural geocentrism advanced primarily by Christian creationists who hold that the Bible teaches a stationary, central Earth, and a smaller current of physical or relativistic geocentrism that argues modern physics, properly understood, permits or even favors an Earth-centered frame. Adherents include both Protestant and Roman Catholic believers, though the two groups frequently diverge on supporting authorities and history.

The central premise of modern geocentrism is that numerous biblical passages, read in their plain and ordinary sense, describe a stationary Earth and a moving Sun. Texts frequently cited include Joshua 10:13, in which the sun is said to stand still in the sky at Joshua's command; Ecclesiastes 1:5, which states that the sun rises and sets and hastens to its place; Psalm 93:1 and 96:10, which describe the world as established so that it cannot be moved; and 1 Chronicles 16:30. Geocentrists argue that if the biblical authors meant only to describe ordinary appearances rather than physical reality, the text gives no internal signal of this, and that reading these passages as accommodating language rather than literal description sets a precedent that can be extended to undermine other doctrines the interpreter finds inconvenient. Geocentrists holding to a doctrine of biblical inerrancy, including King James Onlyism among Protestant adherents, regard a moving Sun and a fixed Earth as a more textually faithful reading than the alternative.

Catholic geocentrists ground their position not primarily in private scriptural interpretation but in the authority of the Church's own historical pronouncements. They point to the 1616 and 1633 decrees of the Roman Inquisition and Index, which formally condemned the heliocentric thesis as contrary to Scripture, and to statements by Church Fathers, by Robert Bellarmine, and by several popes affirming geocentrism as the position consistent with revelation. Adherents of this view argue that since these were disciplinary or doctrinal acts of the ordinary magisterium rather than mere scientific opinion, the Church's later acceptance of heliocentrism, including the 1992 statement regarding Galileo, represents either an unwarranted capitulation to secular science or a failure properly distinguished from genuine doctrinal reversal. They hold that a plain reading of authoritative Catholic tradition favors geocentrism and that the burden of proof lies on those claiming the Church can simply reverse a matter once treated with this gravity.

A separate strand of argument, advanced most prominently by Robert Sungenis, contends that geocentrism is not merely a theological claim but remains physically defensible under general relativity. Proponents argue that because general relativity's field equations are generally covariant, no frame of reference, including a frame centered on and at rest with the Earth, is privileged by the mathematics alone; one may with equal mathematical legitimacy describe the universe as a whole rotating once daily around a fixed Earth. Geocentrists supporting this argument frequently invoke Mach's principle, the proposition associated with Ernst Mach and influential on Einstein, that inertial effects such as centrifugal force are produced by the relative motion of a body with respect to the bulk distribution of distant matter rather than by motion relative to absolute space. If inertia originates in this way, they argue, then a rotating universe around a stationary Earth could in principle generate the same inertial and centrifugal effects attributed to a rotating Earth, making the two descriptions observationally equivalent and the choice between them a matter outside physics proper. On this view, the decision for or against geocentrism is ultimately theological or philosophical rather than empirical, since they hold no observation can decisively settle which body is “really” moving.

Many modern geocentrists explicitly adopt the Tychonic system formulated by Tycho Brahe in the late sixteenth century, in which the Sun and Moon orbit a stationary Earth while the other planets orbit the Sun. Adherents holding this model argue that it is geometrically equivalent to the Copernican and Keplerian heliocentric systems, differing only in the choice of reference body, and that it preserved the predictive accuracy of heliocentric astronomy while avoiding what they regarded as a physically and scripturally objectionable claim that the Earth moves. Because the Tychonic system requires no epicycles of the kind needed by the Ptolemaic system to account for retrograde motion, its modern proponents argue it answers the historical objection that pre-Copernican astronomy was rescued only by increasingly artificial mathematical devices.

Geocentrism was the dominant cosmological framework of antiquity, articulated systematically by Aristotle and given its most influential mathematical form by Claudius Ptolemy in the Almagest. It remained the standard model among astronomers, philosophers, and the Christian church through the Middle Ages. The Copernican proposal of 1543 and its subsequent defense by Galileo Galilei and Johannes Kepler led to the controversies of the early seventeenth century, including the 1616 condemnation of heliocentrism by the Roman Inquisition and Galileo's 1633 trial and condemnation. Tycho Brahe's geo-heliocentric compromise model, published in the 1580s, was widely adopted by astronomers and Jesuit scholars who accepted Tycho's observational refinements while resisting full Copernicanism.

By the eighteenth century, stellar parallax, the aberration of starlight, and the accumulating successes of Newtonian celestial mechanics led to the near-universal abandonment of geocentrism within the scientific community, and full heliocentrism, later refined into the modern understanding that the Sun itself is not a fixed center but one star among billions in a galaxy without a unique physical center, became the consensus position. See History of Heliocentrism for the historical narrative as generally told by its proponents.

Geocentrism persisted afterward chiefly as a minority religious position. A modern revival began in the twentieth century. Walter van der Kamp founded the Tychonian Society in Canada in the 1970s, publishing De Labor Solis and the Bulletin of the Tychonian Society. Gerardus Bouw, an astronomer with a doctorate from Case Western Reserve University, succeeded van der Kamp in 1984, renamed the organization the Association for Biblical Astronomy, and renamed its publication The Biblical Astronomer. Bouw's 1992 book Geocentricity has been described by sympathetic readers as the most sophisticated modern defense of the position. From the 1990s onward, Robert Sungenis, who had left Protestantism and returned to Roman Catholicism in 1992 before encountering Bouw's work roughly a decade later and becoming an advocate for geocentrism himself, became the most publicly visible figure in the movement, founding Catholic Apologetics International and producing the documentary film The Principle along with extensive written defenses of geocentrism grounded in both Catholic tradition and relativistic physics.

• Walter van der Kamp - Dutch-Canadian founder of the Tychonian Society in the 1970s and author of De Labor Solis, the foundational text of the modern revival.
• Gerardus Bouw - American astronomer with a Ph.D. from Case Western Reserve University; longtime leader of the Association for Biblical Astronomy and author of Geocentricity, regarded by adherents as the movement's most rigorous defense; coined the term “geocentricity” to distinguish his Protestant biblical version from older Ptolemaic geocentrism.
• Robert Sungenis - Roman Catholic apologist and president of Catholic Apologetics International; entered the movement as a Catholic after reading Bouw's Geocentricity in the early 2000s, and became its most prominent current advocate, emphasizing both Catholic magisterial authority and arguments drawn from general relativity and Mach's principle.
• Marshall Hall - Author of The Earth Is Not Moving (1991), an early popular work of the modern revival.
• Malcolm Bowden - British engineer and author who has written in defense of geocentric cosmology from a creationist standpoint.

The geocentrist movement is not unified. A long-standing division separates Protestant geocentrists, who ground the position in sola scriptura and frequently in King James Onlyism, from Catholic geocentrists such as Sungenis, who appeal additionally to magisterial authority and are often wary of Protestant hermeneutics. Sungenis's subsequent criticism of the Reformation has at times strained relations with the largely Protestant base that Bouw had cultivated.

A further division concerns the use of modern physics. Some geocentrists, particularly those most committed to a young-earth, anti-relativity reading of Scripture, are suspicious of general relativity itself and reject it as a basis for any argument, scientific or theological. Others, following Sungenis, actively invoke general relativity and Mach's principle as supporting evidence. Critics from outside the movement, and a few sympathetic to parts of it, have noted what they regard as a tension in simultaneously rejecting relativity's broader implications, such as the elimination of any privileged absolute rest frame, while selectively appealing to its mathematics to argue for Earth's special status; geocentrists who employ the relativistic argument respond that Mach's principle and frame equivalence are separable from other relativistic claims they dispute, and that adopting one element of a physical theory without the rest is not in itself inconsistent.

• Geocentrism (Main Topic)
• Heliocentrism Viewpoint
• History of Heliocentrism
• Geocentrism vs. Heliocentrism Debate
• Geocentrism Viewpoint Debate-viewpoint
• Cosmology Consensus
• Mach's Principle

1. Bouw, Gerardus D. Geocentricity. Cleveland: Association for Biblical Astronomy, 1992.
2. van der Kamp, Walter. De Labor Solis. Tychonian Society, 1989 printing.
3. Hall, Marshall. The Earth Is Not Moving. Cornelia, GA: Fair Education Foundation, 1991.
4. Sungenis, Robert A., and Robert J. Bennett. Galileo Was Wrong: The Church Was Right. State Line, PA: Catholic Apologetics International Press, multiple editions.
5. “Modern geocentrism,” Christianity Knowledge Base, christianity.fandom.com/wiki/Modern_geocentrism, accessed 2026.
6. “The Rise of the Modern Geocentric Theory Movement,” Answers in Genesis, answersingenesis.org/astronomy/rise-of-modern-geocentric-theory-movement/, accessed 2026 (secondary source describing movement history and proponents).
7. “Gerardus D. Bouw,” biographical entry, en.wikipedia.org/wiki/Gerardus_D._Bouw, accessed 2026.
8. Acta of the Roman Inquisition, 1616 and 1633, regarding the Copernican thesis, as discussed in standard histories of the Galileo affair.