An enthusiastic appreciation of a spectacular astrophysical entity.
A short, lively account of one of the oddest and most intriguing topics in astrophysics.
Levin, a Guggenheim fellow and professor of physics and astronomy at Barnard College, knows her subject well, but her goal is appreciation as much as education, and there is much to admire in a black hole. Before Einstein, writes the author, scientists believed that the force of gravity influenced the speed of moving objects. They also knew that light always travels at exactly the speed of light. This combination made no sense until 1915, when Einstein explained that gravity is not a force but a curving of space (really, space-time) near a body of matter. The more massive the matter, the greater it curves the space in its vicinity; other bodies that approach appear to bend or change speed when they are merely moving forward through distorted space-time. Einstein’s equations indicated that, above a certain mass, space-time would curve enough to double back on itself and disappear, but this was considered a mathematical curiosity until the 1960s, when objects that did just that began turning up: black holes. Light cannot emerge from a black hole, but it is not invisible. Large holes attract crowds of orbiting stars whose density produces frictional heating and intense radiation. No writer, Levin included, can contain their fascination with the event horizon, the boundary of the black hole where space-time doubles back. Nothing inside the event horizon, matter or radiation, can leave, and anything that enters is lost forever. Time slows near the horizon and then stops. The author’s discussions of the science behind her subject will enlighten those who have read similar books, perhaps the best being Marcia Bartusiak’s Black Hole (2015). Readers coming to black holes for the first time will share Levin’s wonder but may struggle with some of her explanations.
An enthusiastic appreciation of a spectacular astrophysical entity.Pub Date: Nov. 10, 2020
ISBN: 978-0-525-65822-1
Page Count: 160
Publisher: Knopf
Review Posted Online: Aug. 24, 2020
Kirkus Reviews Issue: Sept. 15, 2020
BOOK REVIEW
A rare treat: cutting-edge science combined with a perceptive portrait of the people who perform it. Dressler (Astronomy/Carnegie Institution) was one of a team that set out to perform a survey of elliptical galaxies and ended by revising a fundamental axiom of modern cosmology. The ``Seven Samurai,'' as they became known on the release of their results, combined expertise in observation and theory, bringing an unusual level of astronomical talent to their task. Dressler gives brief biographies of himself and the other team members and devotes considerable space to detailing their personal interactions over the course of the project, providing an unusually candid look at not only what scientists really do, but how they feel about it and about each other. As the data from their survey accumulated, the team's initial goal of discovering clues to the absolute magnitude of distant galaxies began to fade as they realized that a large number of galaxies were traveling at unexpectedly high velocities—1,000 km per hour or more—that could only be explained by the attraction of a huge mass. Equally important, this discovery forced a reconsideration of the assumption that the velocities of distant galaxies are almost entirely due to the expansion of the universe and directly related to their distances from Earth. The implications of the discovery, and its theoretical underpinnings, take up much of the last part of the book, a generally clear overview of current thinking on the origins of the universe. A readable and engaging glimpse behind the facade of contemporary science; Dressler does for astronomy what James D. Watson's The Double Helix did for molecular biology. (31 photos, illustrations, charts, and graphs) (Library of Science and Astronomy Book Club main selection)
Pub Date: Oct. 16, 1994
ISBN: 0-394-58899-1
Page Count: 368
Publisher: Knopf
Review Posted Online: May 19, 2010
Kirkus Reviews Issue: Sept. 1, 1994
A splendid assessment of the many ways there are to be a person, for good and ill.
British scholar and writer Foster delivers a spirited romp through human history and finds our time wanting in many ways.
Building on Being a Beast (2016), in which he looked at the world through the viewpoints of badgers, a fox, and other critters, Foster imagines a humdrum deep past in which not much happened until around the Stone Age, when some mysterious spark fired our imaginations. As he writes, “God is good and favours the Upper Palaeolithic,” and its inhabitants responded to that goodness by painting glorious works of art in hard-to-get-to places, placing their dead in carefully constructed graves, and building cultures. That age of metaphor and creation, of “self-creation and self-knowing,” came crashing down in the Neolithic, which brought us agriculture and urbanization. “In the Neolithic,” Foster laments, “we started to get boring and miserable,” controlled in all sorts of ways. Instead of moving through the land, knowing what to hunt and what to gather and paying close attention to our surroundings, we became machines of labor. The author offers a provocative, pleasing meditation on the different ways in which the two stages of human evolution made use of fire—one to create, one to destroy—and he cleverly links the Neolithic world of overcrowding, forced labor, taxation, epidemic disease, and other woes to our time: “Continue synergistically for 12,000 years or so, and you have us.” This is a magpie book full of intriguing anthropological sketches. On one page, Foster notes that a circular house “is an intrinsically democratic space,” and on another, that the Romans were more interested in nature than were the Greeks. Throughout, the author makes connections between minds past and present with the “more-than-human world.” It’s a book that fits neatly into the growing library of modern British natural history writing, alongside the best of Nan Shepherd, Robert Macfarlane, and Roger Deakin.
A splendid assessment of the many ways there are to be a person, for good and ill.Pub Date: Aug. 31, 2021
ISBN: 978-1-250-78371-4
Page Count: 400
Publisher: Metropolitan/Henry Holt
Review Posted Online: June 21, 2021
Kirkus Reviews Issue: July 15, 2021
BOOK REVIEW
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