Historical Events 1st Observation by Copernicus Mar 9 Nicolaus Copernicus' 1st recorded astronomical observation Astronomer and Mathematician Nicolaus Copernicus 1496 History by Year 1498 Historical Figures Authors Civil Rights Activists Inventors Kings Revolutionaries Scientists
1st Observation by Copernicus1st Observation by Copernicus
Authors
Civil Rights Activists
Inventors
Kings
Revolutionaries
Scientists