
1) Astronomy book 2) Work by Nicolaus Copernicus
Found on
https://www.crosswordclues.com/clue/commentariolus

The `Commentariolus` (`Little Commentary`) is Nicolaus Copernicus`s forty-page outline of an early version of his revolutionary heliocentric theory of the universe. After further long development of his theory, Copernicus published the mature version in 1543 in his landmark work, De revolutionibus orbium coelestium (On the Revolutions of the ...
Found on
http://en.wikipedia.org/wiki/Commentariolus

(from the article `Copernicus, Nicolaus`) In the Commentariolus, Copernicus postulated that, if the Sun is assumed to be at rest and if the Earth is assumed to be in motion, then the ...
Found on
http://www.britannica.com/eb/a-z/c/115
No exact match found.