First heliocentric Solar-System model
- Who
- On the Revolutions of the Celestial Spheres
- Where
- Poland
- When
- 1543
Just before his death in 1543, Nicolaus Copernicus (Poland) published On the Revolutions of the Celestial Spheres, in which he outlined his revolutionary notion of heliocentrism – the idea that planets travel around the Sun. It took at least another 150 years for his idea to become widely accepted.