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The Kotov method of commensurability is a statistical algorithm developed by Russian astrophysicist Valery A. Kotov in 1986. It evaluates how well a set of observed frequencies or periods (e.g., spin rates of planets or orbital periods of exoplanets) fit as integer multiples or fractions of a single...

Harmonics Theory: An Overview Welcome This topic exists to discuss Harmonics Theory — a single principle, developed by Ray Tomes over decades of research, that connects cycles and structures across every scale of the universe, from galactic superclusters down to subatomic particles, and from geolo...

Alexander Thom (1894–1985): The Megalithic Yard and the Geometry of Stone Circles An engineer's second career Alexander "Sandy" Thom was born on 26 March 1894 in Carradale, Scotland, the son of a tenant farmer. He trained as an engineer at the University of Glasgow and went on to a genuinely disti...

Stonehenge: Ancient Monument as Cycle Computer A monument built in stages Stonehenge, on Salisbury Plain in Wiltshire, England, was not built all at once. Archaeologists recognize several main phases of construction spanning roughly 3000 to 1600 BCE. The earliest phase (Stonehenge I) established t...

Alexander Chizhevsky (1897–1964): Father of Heliobiology Early life Alexander Leonidovich Chizhevsky was born on 7 February 1897 in Tsekhanovets, then part of the Russian Empire (now Ciechanowiec, Poland), the son of a Russian military general. He grew up mainly in Kaluga — coincidentally the same...

Alexander Chizhevsky (1897–1964): Father of Heliobiology Early life Alexander Leonidovich Chizhevsky was born on 7 February 1897 in Tsekhanovets, then part of the Russian Empire (now Ciechanowiec, Poland), the son of a Russian military general. He grew up mainly in Kaluga — coincidentally the same...

Raymond H. Wheeler (1892–1961): Mapping 2,500 Years of Climate and Civilization An unlikely climatologist Raymond Holder Wheeler was, by training, a psychologist — a professor at the University of Kansas whose early career was spent in laboratory studies of perception and behavior. It was a striki...

Cyclical Time in the World's Religions and Spiritual Traditions Seven short pieces, one per tradition, written so each can be pasted as its own post in the Spiritual/Religious/Esoteric section. Where a tradition states an actual numeric period, it's called out explicitly. Hinduism (and its Vedi...

Cycles in the City ’26 — Foundation for the Study of Cycles May 28–30, 2026 · SUNY Global Center, New York The Foundation for the Study of Cycles (FSC) — the organisation founded by Edward R. Dewey and now home to Ray Tomes as Science Director — held its second annual in-person conference, Cycles...

Largest Moons in the Solar System The 20 largest natural satellites, ordered by diameter. For the complete, continuously updated list of all ~290+ known moons, see NASA Solar System Moons or the JPL Planetary Satellite pages. Name Parent Diameter (km) Mass (×10^20 kg) Orbital Period (...

Largest Moons in the Solar System The 20 largest natural satellites, ordered by diameter. For the complete, continuously updated list of all ~290+ known moons, see NASA Solar System Moons or the JPL Planetary Satellite pages. Name Parent Diameter (km) Mass (×10^20 kg) Orbital Period (...

Planets and Dwarf Planets — Orbital & Physical Parameters Ordered by distance from the Sun. Sources: JPL Solar System Dynamics (ssd.jpl.nasa.gov), Princeton planetary systems database, IAU Minor Planet Center (moon counts, March 2026). Orbital Parameters Name Type Distance from Sun...

This Cycles and Harmonics Forum is being created in July 2026. The previous one was very active but was overrun and destroyed by large numbers of spammers. Everyone is allowed to read this forum without joining. We have implemented the following steps for the integrity of the forum for people wantin...

William Kingdon Clifford (May 4, 1845 – March 3, 1879) British mathematician and philosopher, educated at King's College London and Trinity College Cambridge (fellow from 1868), later professor of mathematics at University College London (1871) and Fellow of the Royal Society (1874). Died young, o...

Edward R. Dewey (1895–1978) is the founding figure of organized cycles research and the reason this whole tradition — and this forum's parent organization, the Foundation for the Study of Cycles (FSC, founded 1941) — exists at all. Trained as an economist, Dewey was asked by the U.S. government why ...

J.M. Hurst (James Marsden Hurst, 1924–2005) was an American aerospace engineer who, in the 1960s, brought a genuinely scientific/engineering approach to market cycles — using early mainframe computers and signal-processing techniques (the kind of tools used for radar and telemetry) to analyze decade...