Question: When was on the revolutions of the heavenly spheres published?
Answer: 1543
Disambiguated questions and answers: question: When was on the revolutions of the heavenly spheres published in Nuremberg?
When was on the revolutions of the heavenly spheres published in Basel?
When was on the revolutions of the heavenly spheres published in Amsterdam?
When was on the revolutions of the heavenly spheres published in Warsaw with a polish translation?
When was on the revolutions of the heavenly spheres published in Thorn/Toruń as a german translation?
answer: 1543
1566
1617
1854
1873
Natural Questions answer: 1543 (from the Wikipedia article "De revolutionibus orbium coelestium")