Sir William Rowan Hamilton (1805-1865) was an Irish physicist, astronomer, and mathematician who made important contributions to mechanics, optics, and algebra. As a teenager, he mastered parts of Newton's Principia and studied Laplace's celestial mechanics treatise. When barely 22, Hamilton became a professor of astronomy at University of Dublin, however he was more interested in theoretical rather than practical astronomy.His studies of mechanical and optical systems led him to discover new mathematical concepts and techniques. His greatest contribution is perhaps the reformulation of Newtonian mechanics, now called Hamiltonian mechanics. This work has proven central to the modern study of classical field theories such as electromagnetism, and to the development of quantum mechanics.In mathematics, he is perhaps best known as the inventor of the quaternion, which is a mathematical concept that find uses in both theoretical and applied mathematics, in particular for calculations involving three-dimensional rotations such as in three-dimensional computer graphics, computer vision, and the attitude-control systems of spacecraft.Hamilton is said to have shown immense talent at a very early age. He had a remarkable aptitude for languages as a youth. As a young man, his talents turned to mathematics of astronomy and physics. Astronomer John Brinkley remarked of the 18-year-old Hamilton, "This young man, I do not say will be, but is, the first mathematician of his age."
Book Excerpt: Ptolemy succeeded in devising a scheme by which the apparent changes that take place in the heavens could, so far as he knew them, be explained by certain combinations of circular movement.
Great Astronomers By Robert S. Ball
Of all the natural sciences there is not one which offers such sublime objects to the attention of the inquirer as does the science of astronomy.
As always, this edition is complete and unabridged.
PTOLEMY. COPERNICUS. TYCHO BRAHE. GALILEO. KEPLER. ISAAC NEWTON. FLAMSTEED. HALLEY. BRADLEY. WILLIAM HERSCHEL. LAPLACE. BRINKLEY. JOHN HERSCHEL. THE EARL OF ROSSE. AIRY. HAMILTON. LE VERRIER. ADAMS.
In his theory this huge error was associated with so much important truth, and the whole presented such a coherent scheme for the explanation of the heavenly movements, that the Ptolemaic theory was not seriously questioned until the great ...
This book looks at some of the great astronomers who have helped us expand our knowledge of the universe - from the observations of the ancient Greeks, to the photographs from the furthest space probe.
Great Astronomers: Tycho Braheby Robert Stawell BallThis is the chapter on 16th century Danish astronomer Tycho Brahe from Sir Robert S. Ball's Great Astronomers, second edition, which begins: "The most picturesque figure in the history of ...
Tycho Brahe ( December 14, 1546 - October 24, 1601), was a Danish nobleman known for his accurate and comprehensive astronomical and planetary observations.
He compiled a catalogue of the principal fixed stars, which is of special value to astronomers, as being the earliest work of its kind which has been handed down.