James Ferguson, Proof Against the Ptolemaic System, 1756
Bildnummer 12650607
| Astronomy Explained Upon Sir Isaac Newton's Principles, And Made Easy to Those who Have Not Studied Mathematics by James Ferguson. Figure I (left) shows the Earth at centre, with the Sun tracing a circular orbit. The orbits of Mercury and Venus in this geocentric system are shown by a series of complex epicycles. Figure IIII (upper right) shows the phases of the Moon. Figure III (lower right) shows the Sun and Moon and the celestial equator and ecliptic, and Earth's axial inclination. Figure II shows how the Earth's axial tilt causes the seasons. James Ferguson (1710-1776) was a Scottish astronomer and instrument maker. He wrote papers for the Royal Society of London, devised astronomical and mechanical models, and in 1748 began to give public lectures on experimental philosophy. His passion for his subject, his clear explanations with diagrams, made him one of the most successful of popular lecturers on scientific subjects. | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / Science Source |
| Bildgröße: | 4650 px × 2992 px |
| Modell-Rechte: | nicht erforderlich |
| Eigentums-Rechte: | nicht erforderlich |
| Restrictions: | - |
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