Before the Moon

What ancient writers actually said

Several classical authors, spanning nearly a thousand years, applied a striking epithet to the Arcadians of ancient Greece: proselenoi, roughly "before the moon". The claim is attested from at least the fifth century BCE historian Hippys of Rhegium, whose fragment is preserved by Stephanus of Byzantium, and repeated by Aristotle, the astronomer Eudoxus of Cnidus, Apollonius of Rhodes in the Argonautica, Plutarch in the Roman Questions, Ovid in the Fasti, Hippolytus, and a doubtful Lucian. Ovid wrote that the Arcadians "possessed their land before the birth of Jove, and the folk is older than the Moon." Plutarch simply called them "the so-called pre-lunar people."

That much is real, and checkable in the primary texts. What it meant is a different question entirely.

Daniel Dueck's 2020 study in Philologus, "A lunar people: the meaning of an Arcadian epithet, or, who is the most ancient of them all?", examines the term directly. I have not read it in full. The reading most often given is a rhetorical claim of extreme antiquity and autochthony, a way of saying "we were here before anyone, before even the sky looked the way it does now," rather than a literal astronomical memory. Ancient peoples across the Mediterranean regularly competed over whose ancestors were oldest; claiming to predate a celestial body was, on this reading, a maximalist version of that boast.

Where the modern retelling comes from

Here a correction is necessary, because it changes how the claim should be read.

The specific compilation of quotes now repeated across dozens of websites, Aristotle wrote this, Apollonius mentioned that, Plutarch recorded this, matches one source: Immanuel Velikovsky, the Russian-born psychoanalyst and self-styled catastrophist, in his mid-twentieth-century writing. Velikovsky's larger project argued that planets had collided and nearly collided within human memory, reshaping mythology as garbled eyewitness testimony. His proselenoi list has been copied, largely unaltered, into fringe and pseudo-archaeology sites for decades since, frequently without any acknowledgment that it originates with him rather than with independent classical scholarship.

A text of his, hosted on a Velikovsky archive, carries the same set of authors: Aristotle, Apollonius, Plutarch, Ovid and Hippolytus. I have not confirmed that it is the first appearance of the list. This does not make the underlying classical citations false. Aristotle really did use the term; Ovid really did write those lines. It means the specific framing, ancient historians documented a moonless past, is Velikovsky's interpretive frame laid over real texts, not itself a classical or scientific conclusion.

The genuinely open scientific question

Separately from the classical material, and considerably more solid, sits a real unresolved problem in lunar science.

The dominant model for how the Moon formed is the giant impact hypothesis: a Mars-sized body, usually called Theia, struck the young Earth roughly 4.5 billion years ago, and the debris coalesced into the Moon. The model explains the Moon's low iron content and the angular momentum of the Earth-Moon system well. It has one persistent problem: the Moon's isotopic signature, measured across oxygen, titanium and tungsten ratios in Apollo samples, is nearly indistinguishable from Earth's. Since most of the Moon's material should, on the standard model, come from the impactor rather than Earth, and impactors are expected to differ isotopically from the planets they strike, this near-identical signature is difficult to explain. Lunar scientists themselves call it the isotopic crisis.

Proposed resolutions include high-energy impacts that thoroughly mix and re-equilibrate Earth and impactor material, multiple smaller impacts rather than one giant one, and exotic intermediate states such as a "synestia", a temporary, vapourised, donut-shaped body neither fully planet nor disk. None has become the settled answer. This is real, current, peer-reviewed uncertainty, not speculation.

The bell, and what actually rang

On 20 November 1969, the ascent stage of the Apollo 12 lunar module was deliberately crashed into the Moon's surface, a calibration test for the seismometer the astronauts had just deployed. The resulting vibrations lasted far longer than equivalent seismic events on Earth, reverberating for roughly an hour rather than dissipating within minutes. NASA's own scientists described it, informally, as the Moon "ringing like a bell."

In July 1970, eight months later, Soviet writers Mikhail Vasin and Alexander Shcherbakov published an article in the popular magazine Sputnik titled "Is the Moon the Creation of Alien Intelligence?", using the seismic result as their central piece of evidence for a hollow, artificial moon. This is the direct origin point of the "spaceship moon" idea that later populates books such as Don Wilson's Our Mysterious Spaceship Moon and, in a different register, Christopher Knight and Alan Butler's Who Built the Moon?. None of these are peer-reviewed scientific works; they are popular books built on the same seismic anecdote.

The mainstream explanation for the prolonged reverberation does not require a hollow interior. The Moon's surface and upper crust are extremely dry and heavily fractured by billions of years of impacts, with none of the water or continuous rock layering that damps seismic waves quickly on Earth. Dry, shattered rock scatters seismic energy rather than absorbing it, which produces exactly the kind of long, complex reverberation the Apollo seismometers recorded. This is standard, accepted lunar seismology, not a contested rebuttal.

What is still open