A contemporary of Galileo and a forerunner of Isaac Newton, Johannes Kepler (1571-1630) was a pioneering German scientist and a pivotal figure in the history of astronomy. This colorful, well-researched biography brings the man and his scientific discoveries to life, showing how his contributions were every bit as important as those of Copernicus, Galileo, and Newton.It was Kepler who first advocated the completely new concept of a physical force emanating from the sun that controls the motion of the planets--today we call this gravity and take it for granted. He also established that the orbits of the planets were elliptical in shape and not circular. And his three laws of planetary motion are still used by contemporary astronomers and space scientists.The author focuses not just on these and other momentous breakthroughs but also on Kepler's arduous life, punctuated by frequent tragedy and hardships. His first wife died young, and eight of the twelve children he fathered succumbed to disease in infancy or childhood. He was frequently caught up in the religious persecutions of the day. His mother narrowly escaped death when she was accused of being a witch.Intermingling historical and personal details of Kepler's life with lucid explanations of his scientific research, this book presents a sympathetic portrait of the man and underscores the critical importance of Kepler's discoveries in the history of astronomy.

Edmond Halley is known far and wide thanks largely to the comet bearing his name, the nature of which he predicted in 1705. While that discovery is enough to make the career of any scientist, Halley’s massive contributions to the fields of astronomy, philosophy, history, mathematics, engineering, and actuarial science – the latter of which he founded single-handedly – as a young man and eventually as Astronomer Royal are mostly overlooked. Edmond Halley: The Astronomer Royal Who Brought the Universe to Earth is a revelatory and deeply researched biography of a man whose defining achievement isn’t even the half of it. A jack-of-all-trades when it came to scientific reasoning, an all-around academic, Renaissance man, and workaholic who couldn’t leave well enough alone, Halley was amazingly productive and prolific. He was behind some of the most groundbreaking pieces of discovery in human history: it was Halley who was the first to survey the skies and plot the stars of the southern hemisphere; he published Isaac Newton’s Principia Mathematica, which many argue is the most important scientific text ever written; in the field of history, he translated the works of ancient Greek mathematician Apollonius and calculated the date of Julius Caesar’s arrival in Britain; he captained the ship Paramore on a scientific expedition to plot the Earth’s magnetic fields, not losing a single original crewmember on the mission; Halley was the first to calculate mortality annuities, creating the foundation for actuarial science; he made improvements to the diving bell, surveyed the tides of the English channel, and led the movement to accurately measure the distance between the Earth and Sun, unlocking the key to determining the distance to the nearest stars. In this incisive and surprising biography, author David K. Love reveals the boundless mind and endless curiosity of Edmond Halley, a man whom many readers may think they already know. From his inventions and innovations to his personal life, Edmond Halley firmly cements the legacy of the second Astronomer Royal among the first-rate scientists of his time.

A contemporary of Galileo and a forerunner of Isaac Newton, Johannes Kepler (1571-1630) was a pioneering German scientist and a pivotal figure in the history of astronomy. This colorful, well-researched biography brings the man and his scientific discoveries to life, showing how his contributions were every bit as important as those of Copernicus, Galileo, and Newton. It was Kepler who first advocated the completely new concept of a physical force emanating from the sun that controls the motion of the planets--today we call this gravity and take it for granted. He also established that the orbits of the planets were elliptical in shape and not circular. And his three laws of planetary motion are still used by contemporary astronomers and space scientists. The author focuses not just on these and other momentous breakthroughs but also on Kepler's arduous life, punctuated by frequent tragedy and hardships. His first wife died young, and eight of the twelve children he fathered succumbed to disease in infancy or childhood. He was frequently caught up in the religious persecutions of the day. His mother narrowly escaped death when she was accused of being a witch. Intermingling historical and personal details of Kepler's life with lucid explanations of his scientific research, this book presents a sympathetic portrait of the man and underscores the critical importance of Kepler's discoveries in the history of astronomy.