Letter to the Editor of Sky and Telescope Concerning Galileo's Observations of Mizar

TL;DR

This paper discusses Galileo's observations of Mizar, highlighting how they challenged his assumptions about Earth's motion due to the lack of observed parallax, raising questions about his conclusions.

Contribution

It critically examines Galileo's observational assumptions and conclusions regarding Mizar, questioning the interpretation of his data in the context of Earth's motion.

Findings

Galileo expected to observe parallax in Mizar

Mizar shows no detectable parallax

Questions raised about Galileo's assumptions and conclusions

Abstract

Work published in Sky and Telescope in 2004 discusses Galileo's observations of the star Mizar. These observations raise questions regarding Galileo's assumptions about the universe and the conclusions he drew from his observations. Galileo would have expected Mizar to reveal annual parallax and thus provide evidence of Earth's motion, but Mizar shows no such parallax.