Cherubs conducting experiments to prove the immobility of the Earth, 1645.

Engraving attacking copernican theory; (Nicolaus Copernicus (1473-1543) proposed the sun-centred universe, in which the Earth is merely one of the planets revolving around the Sun and rotating on its axis). Here Jacques Grandami (1588-1672) uses his own theories about terrestrial magnetism in an attempt to prove the immobility of the earth. It was probably inspired by Galileo's 'Dialogo dei masimi sistemi', which was published in 1632. Illustration from Grandami's 'Nova demonstratio immobilitatis terrae petita ex virtute magnetica', published in France in 1645.