# Galileo reports phases of Venus as a dated public argument against simple Ptolemaic order

Date: 1610

## The fact

In late 1610 Galileo reported phases of Venus as a public argument against simple Ptolemaic order. It is not the March book. Galileo Galilei's documented role is: He reported Venus phases in letters and later print. The sky is nature's; the report is his.

## Context

Castelli correspondence sits in the file. Sharing the report with those letters is required. The setting of Galileo reports phases of Venus as a dated public argument against simple Ptolemaic order is the public file around 1610-12-01. Shared offices, unnamed crews, printers, or later editors may appear without becoming this instrument. Contribution type is direct. Driver edu-[digital-learning-access](/drivers/edu-digital-learning-access) is attached because the significance names a mechanism from this act, not because a standing list needed coverage.

Confidence is stated on the impact path, not hidden in adjectives. Do not twin with Sidereus Nuncius. Different instrument, later in 1610. Mixed effects of Galileo reports phases of Venus as a dated public argument against simple Ptolemaic order are separate paths.

## Evidence and sources

Official locator: Stanford Encyclopedia of Philosophy — Galileo, Venus phases at https://plato.stanford.edu/entries/galileo/ (Stanford Encyclopedia of Philosophy). Independent locator: Britannica — Galileo, Venus at https://www.britannica.com/biography/Galileo-Galilei (Encyclopaedia Britannica). Official carrier: Stanford Encyclopedia of Philosophy — Galileo, Venus phases (https://plato.stanford.edu/entries/galileo/; Stanford Encyclopedia of Philosophy). Independent carrier: Britannica — Galileo, Venus (https://www.britannica.com/biography/Galileo-Galilei; Encyclopaedia Britannica).

Official or archival record: Stanford Encyclopedia of Philosophy — Galileo, Venus phases (https://plato.stanford.edu/entries/galileo/; Stanford Encyclopedia of Philosophy).

## Significance

Improving path from Galileo reports phases of Venus as a dated public argument against simple Ptolemaic order on 1610-12-01. A public phase-report is an education path, distinct from the 1610 book. The welfare reading on this path is improving.

The contribution type is direct. The welfare reading used in this dossier is improving. That reading is an impact-path choice, not a property stored on the Fact itself.

## What is established and what is not

Established: a sourced public record of Galileo reports phases of Venus as a dated public argument against simple Ptolemaic order under 1610-12-01 for Galileo Galilei. Established: a sourced public record of Galileo reports phases of Venus as a dated public argument against simple Ptolemaic order under 1610-12-01.

Shared responsibility is part of Galileo reports phases of Venus as a dated public argument against simple Ptolemaic order. Naming Galileo Galilei does not delete co-authors, institutions, or later transmitters. The lag from 1610-12-01 to any measured indicator is not treated as zero. Alternative explanations — weather, other armies, later statutes, or independent cultural change — remain live where the sources do not close them.

If a number is not in the two records named above, it is not supplied here.

Later competitions, monuments, translations, UNESCO listings, museums, and adaptations are not converted into extra lifetime acts.

## People

- Galileo Galilei: https://factrail.ai/people/galileo-galilei

## Drivers

- Digital Learning Access: https://factrail.ai/drivers/edu-digital-learning-access

## Sources

- https://plato.stanford.edu/entries/galileo/
- https://www.britannica.com/biography/Galileo-Galilei

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/gal-venus-phases