Miss Leavitt S Stars The Untold Story Of The Woman Who Discovered How To Measure The Universe Great Discoveries
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Author : George Johnson Publisher : W. W. Norton & Company Page : 176 pages File Size : 43,6 Mb Release : 2006-06-17 Category : Science ISBN : 9780393348378
Miss Leavitt's Stars: The Untold Story of the Woman Who Discovered How to Measure the Universe (Great Discoveries) by George Johnson Pdf
“A short, excellent account of [Leavitt’s] extraordinary life and achievements.”—Simon Singh, New York Times Book Review At the beginning of the twentieth century, scientists argued over the size of the universe: was it, as the astronomer Harlow Shapley argued, the size of the Milky Way, or was there more truth to Edwin Hubble’s claim that our own galaxy is just one among billions? The answer to the controversy—a “yardstick” suitable for measuring the cosmos—was discovered by Henrietta Swan Leavitt, who was employed by the Harvard Observatory as a number cruncher, at a wage not dissimilar from that of workers in the nearby textile mills. Miss Leavitt’s Stars uncovers her neglected history, and brings a fascinating and turbulent period of astronomical history to life.
A century ago, a brilliant woman found the key to the vastness of the universe; her name was Henrietta Swan Leavitt. She was hired by Harvard Univ. to calculate the positions and luminosities of stars in astronomical photos. She discovered a new law, one that would transform the field of cosmology. Because of Leavitt¿s discovery, astronomers could use a kind of star known as a ¿variable¿ as a cosmic yardstick. Her law settled an important astronomical question; how big is the universe? Using Leavitt¿s law, the astronomer Edwin Hubble was able to prove that there were galaxies beyond the Milky Way, and that the universe is unfathomably large. ¿A masterly account of how we measure the universe and the moving story of a neglected genius.¿ Illus.
"A short, excellent account of [Leavitt’s] extraordinary life and achievements." —Simon Singh, New York Times Book Review George Johnson brings to life Henrietta Swan Leavitt, who found the key to the vastness of the universe—in the form of a “yardstick” suitable for measuring it. Unknown in our day, Leavitt was no more recognized in her own: despite her enormous achievement, she was employed by the Harvard Observatory as a mere number-cruncher, at a wage not dissimilar from that of workers in the nearby textile mills. Miss Leavitt’s Stars uncovers her neglected history.
From #1 New York Times bestselling author Dava Sobel, the "inspiring" (People), little-known true story of women's landmark contributions to astronomy A New York Times Book Review Notable Book of 2017 Named one of the best books of the year by NPR, The Economist, Smithsonian, Nature, and NPR's Science Friday Nominated for the PEN/E.O. Wilson Literary Science Writing Award "A joy to read.” —The Wall Street Journal In the mid-nineteenth century, the Harvard College Observatory began employing women as calculators, or “human computers,” to interpret the observations their male counterparts made via telescope each night. At the outset this group included the wives, sisters, and daughters of the resident astronomers, but soon the female corps included graduates of the new women's colleges—Vassar, Wellesley, and Smith. As photography transformed the practice of astronomy, the ladies turned from computation to studying the stars captured nightly on glass photographic plates. The “glass universe” of half a million plates that Harvard amassed over the ensuing decades—through the generous support of Mrs. Anna Palmer Draper, the widow of a pioneer in stellar photography—enabled the women to make extraordinary discoveries that attracted worldwide acclaim. They helped discern what stars were made of, divided the stars into meaningful categories for further research, and found a way to measure distances across space by starlight. Their ranks included Williamina Fleming, a Scottish woman originally hired as a maid who went on to identify ten novae and more than three hundred variable stars; Annie Jump Cannon, who designed a stellar classification system that was adopted by astronomers the world over and is still in use; and Dr. Cecilia Helena Payne, who in 1956 became the first ever woman professor of astronomy at Harvard—and Harvard’s first female department chair. Elegantly written and enriched by excerpts from letters, diaries, and memoirs, The Glass Universe is the hidden history of the women whose contributions to the burgeoning field of astronomy forever changed our understanding of the stars and our place in the universe.
Henrietta Levitt was the first person to discover the scientific importance of a star’s brightness—so why has no one heard of her? Learn all about a female pioneer of astronomy in this picture book biography with audio. Henrietta Swan Leavitt was born on July 4, 1868, and she changed the course of astronomy when she was just twenty-five years old. Henrietta spent years measuring star positions and sizes from photographs taken by the telescope at the Harvard College Observatory, where she worked. After Henrietta observed that certain stars had a fixed pattern to their changes, her discovery made it possible for astronomers to measure greater and greater distances—leading to our present understanding of the vast size of the universe. An astronomer of her time called Henrietta Leavitt “one of the most important women ever to touch astronomy,” and another close associate said she had the “best mind at the Harvard Observatory.” Henrietta Leaveitt's story will inspire young women and aspiring scientists of all kinds and includes additional information about the solar system and astronomy. This eBook edition also includes audio accompaniment.
The historian and author of Lillian Gilbreth examines the “Great Man” myth of science with profiles of women scientists from Marie Curie to Jane Goodall. Why is science still considered to be predominantly male profession? In The Madame Curie Complex, Julie Des Jardin dismantles the myth of the lone male genius, reframing the history of science with revelations about women’s substantial contributions to the field. She explores the lives of some of the most famous female scientists, including Jane Goodall, the eminent primatologist; Rosalind Franklin, the chemist whose work anticipated the discovery of DNA’s structure; Rosalyn Yalow, the Nobel Prize-winning physicist; and, of course, Marie Curie, the Nobel Prize-winning pioneer whose towering, mythical status has both empowered and stigmatized future generations of women considering a life in science. With lively anecdotes and vivid detail, The Madame Curie Complex reveals how women scientists have changed the course of science—and the role of the scientist—throughout the twentieth century. They often asked different questions, used different methods, and came up with different, groundbreaking explanations for phenomena in the natural world.
How does it happen that billions of stars can cooperate to produce the beautiful spirals that characterize so many galaxies, including ours? This book reviews the history behind the discovery of spiral galaxies and the problems faced when trying to explain the existence of spiral structure within them. In the book, subjects such as galaxy morphology and structure are addressed as well as several models for spiral structure. The evidence in favor or against these models is discussed. The book ends by discussing how spiral structure can be used as a proxy for other properties of spiral galaxies, such as their dark matter content and their central supermassive black hole masses, and why this is important.
Reading, Writing, and Inquiry in the Science Classroom, Grades 6-12 by Kathleen Chamberlain,Christine Corby Crane Pdf
This resource covers reading and writing practices, science standards, and sample lessons to help educators successfully integrate literacy and science instruction in any classroom.
An unforgettable exploration of the natural world and the concept of biodiversity—what it is, why it matters, and how we as individuals can work to preserve it. We are now living in an environmental emergency. As climate change, habitat loss, and other threats have placed almost one-fifth of all species on Earth at risk of extinction in the coming decades, a deeper understanding of biodiversity has never been more important. Biodiversity encompasses the rich variety of all life on Earth—the building blocks of life that provide invaluable sources of food, medicine, clothing, building materials, and more. Marking the arrival of a bold new voice in popular science, The Hidden Universe shows readers what’s at stake in the fight to protect and restore biodiversity, but also what can and should be done now to protect our planet and ourselves for the future. As director of science at one of the world’s largest research organizations in plant and fungal sciences, Brazilian-born scientist Alexandre Antonelli is ideally suited to reveal the wonders of biodiversity at a genetic, species, and ecosystem level—what biodiversity is, how it works, and why it is the most important tool in our battle against climate change. Antonelli offers recommendations for large-scale political changes, as well as smaller, practical steps that readers can implement in their own lives and homes. With Antonelli as our guide, The Hidden Universe helps us imagine a future where biodiversity is not just preserved but cherished.
It was not always known that the Milky Way is just one of many galaxies in the universe. Edwin Hubble is the man who discovered this startling idea and that the universe was expanding. As a result of these discoveries, Hubble became an international celebrity, and is remembered today as a genius of science.
Beyond the Stars by Paolo Saraceno,David Goodstein Pdf
"What is the origin of the universe? Are we alone in the Universe?" Using clear and plain language, the author explores these two interesting scientific-philosophical themes with a broad range of studies, including astronomy, cosmology, chemistry, biology, geology and planet science. The first part discusses the origins of everything, from the Big Bang to humankind. It follows the long course of evolution — from original matter to the formation of more complex structures, from the furthest galaxies to the nearest stars, from planets to organic molecules, from the first and most elementary forms of life through to the reptiles, the dinosaurs and the advent of man. The second part traces the history of the Earth and evaluates the risks of extinction in the future as predicted by scientists. Is the Earth the only habitable planet in the Universe? This question initiates the discussion on the importance of the Earth's position in the solar system and the significance of our geologically alive planet. The final part is dedicated to the search for extraterrestrial beings with identifiable life forms. It also describes attempts for searching, from the past to the near future. This remarkable book provides the best answers we have to the epic questions about us and our place in the universe. Contents: "Origins: "Our OriginsThe Beginning of EverythingOrigins of Stars and PlanetsThe Origin of the ElementsThe Origins of Life"The Case of the Earth: "History of the EarthExtinctionsAn Inhabitable PlanetThe Importance of Continental DriftThe Earth: A Rare Planet?"In Search of Another Gaia: "In Search of ETIThe MeasurementAppendix A: Astronomical ObservationsAppendix B: A Few Numbers Readership: General audience interested in general science.
When the Great Abyss Opened by J. David Pleins Pdf
The story of Noah's flood is one of the best-loved and most often retold biblical tales, the inspiration for numerous children's books and toys, novels, and even films. Whether as allusion, archetype, or literal presence--the American landscape is peppered with "recreations" of the ark--the story of Noah's animals and the ark resonates throughout American culture and the world. While most think of Noah's ark as a dramatic myth, others are consumed by the quest for geological and archeological proof that the flood really occurred. Persistent rumors of a large vessel on the mountain of Ararat in Turkey, for instance, have led many pilgrims and explorers over the centuries to visit that fabled peak. Recent finds suggest that there may have been a catastrophic flood on the shores of the Black Sea some 7,600 years ago. Is this then the reality behind the ancient tale of Noah? More to the point, why does it matter? What does the story of the Flood mean to us and why does it so stir the collective imagination? When the Great Abyss Opened examines the history of our attempts to understand the Flood, from medieval Jewish and Christian speculation about the physical details of the ark to contemporary efforts to link it to scientific findings. Unraveling the mythical dimensions of the parallel Mesopotamian flood stories and their deeper social and psychological significance, J. David Pleins also considers the story's positive uses in theology and moral instruction. Noah's tale, however, has also been invoked as a means of justifying exclusion, racism, and anti-homosexual views. Pro-slavery advocates, for example, used the story of Noah's Curse on Ham's son Canaan to rationalize the enslavement of Africans. Throughout this expansive and lively book, Pleins sheds new light on our continuing attempts to understand this ancient primal myth. Noah's Flood, he contends, offers a unique case study that illuminates the timeless and timely question of how fact and faith relate.
