"The troubled history of the Hubble constant told in an authoritative, comprehensible, and entertaining manner
In 1927 Georges Lemaître argued that our universe is expanding, a conclusion rendered more startling by the astronomical data that backed it up, presented two years later by Edwin Hubble. The speed of this expansion is governed by Hubble's constant, and Discordance tells its troubled history.
This unpredictable and fascinating story begins with the first tentative steps to measure the distances to nearby stars and galaxies. It traces the extraordinary interplay between cosmological theory and astronomical observation which has given us the standard Big Bang theory. It was not all plain sailing, and the narrative takes us through the discovery of dark matter, the Hubble Wars of the 1970s, the invention of cosmic inflation, and other crucial scientific moments. Further satellite missions were expected to add to the clarity of our measurements. But from about 2009 onward, the results began to diverge. This is the Hubble tension and perhaps even a crisis.
Jim Baggott clearly and entertainingly guides the reader through this gripping scientific voyage—one littered with crises of confidence, astonishing discoveries, and extraordinary personalities—which still continues today.
'Accessible, highly detailed and demanding—and therefore highly rewarding— … Baggott's well-researched work will be of as much interest to astronomers and physicists as it is to lay readers fascinated by the mysteries of the Universe.'— Helge Kragh, Nature"
"In 1927, Niels Bohr and Albert Einstein began a debate about the interpretation and meaning of the new quantum theory. This would become one of the most famous debates in the history of science. What (if any) limits should we place on our expectations for what science can tell us about physical reality?
Our protagonists slowly disappeared from the vanguard of physics, as its center of gravity shifted from a war-ravaged Continental Europe to post-war America. What Einstein and Bohr had considered to be matters of the utmost importance were now set aside. Their debate was regarded either as settled in Bohr's favor or as superfluous to real physics.
As quantum entanglement became a real physical phenomenon, whole new disciplines were established, such as quantum computing, teleportation, and cryptography. The efforts of the experimentalists were rewarded with shares in the 2022 Nobel prize in physics.
As Quantum Drama reveals, science owes a large debt to those who kept the discussions going before definitive experimental inquiries became possible. Although experiment moved the Bohr-Einstein debate to a new level, it has by no means removed or resolved the fundamental question."
"Today we are blessed with two extraordinarily successful theories of physics. The first is Albert Einstein's general theory of relativity, which describes the large-scale behavior of matter in a curved spacetime. The second is quantum mechanics. This theory describes the properties and behavior of matter and radiation at their smallest scales.
But, while they are both highly successful, these two structures leave a lot of important questions unanswered. They are also based on two different interpretations of space and time, and are therefore fundamentally incompatible. We have two descriptions but, as far as we know, we've only ever had one universe. What we need is a quantum theory of gravity.
Approaches to formulating such a theory have primarily followed two paths. One leads to String Theory, which has for long been fashionable, and about which much has been written. But String Theory has become mired in problems. Combining clear discussions of both quantum theory and general relativity, this book offers one of the first efforts to explain the new quantum theory of space and time."
"The hunt for the Higgs particle has involved the biggest, most expensive experiment ever. So exactly what is this particle? Why does it matter so much? What does it tell us about the Universe? Did the discovery announced on 4 July 2012 finish the search? And was finding it really worth all the effort?
The short answer is yes. The Higgs field is proposed as the way in which particles gain mass—a fundamental property of matter. It's the strongest indicator yet that the Standard Model of physics really does reflect the basic building blocks of our Universe. Little wonder the hunt and discovery of this new particle produced such intense media interest.
Here, Jim Baggott explains the science behind the discovery, looking at how the concept of a Higgs field was invented, how the vast experiment was carried out, and its implications on our understanding of all mass in the Universe."
Join our community for the latest bookish news, reading recommendations, exclusive opening extracts, author events and competitions. It\'s all free. And enter a monthly draw to win a £50 Gift Card. See past winners here
