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"Edwin Hubble"
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Cosmic inflation explained
\"Cosmic inflation is the theory that the early universe went through fast, exponential expansion for a fraction of a second after the Big Bang and then slowed down to the current rate of expansion. Simplified explanations of complex scientific concepts such as dark energy, dark matter, and the cosmic microwave background and dynamic images will help students comprehend how the study of cosmic inflation has reshaped our understanding of how the universe was born, evolved, and might be in the future. This title correlates with the Next Generation Science Standards' emphasis on scientific collection and analysis of data and evidence-based theories. Informative sidebars explore related timely topics in depth, while a Further Reading section provides several resources for additional study.\"-- Provided by publisher.
BOOK
DK - 100 scientists that made history. Episode 65, Edwin Hubble
Edwin Hubble's discovery of galaxies beyond the Milky Way and the expanding universe transformed astronomy, laying groundwork for the Big Bang theory.
Streaming Video
The big bang explained
\"The Big Bang theory describes the very beginnings of the universe, when it was infinitesimally small and infinitely dense, and follows its rapid expansion and evolution, from the formation of nuclei within the first few minutes to the creation of the first galaxies a billion years later. The Big Bang theory is a cornerstone of modern cosmology, and although astronomers cannot directly observe the birth of the universe, the theory is widely accepted because it makes concrete predictions of the current observable universe, which have been tested repeatedly with striking success. Supporting the Next Generation Science Standards' emphasis on scientific collection and analysis of data and evidence-based theories, this book will help students understand the observational evidence supporting the Big Bang theory and speculate on the ultimate fate of the universe it implies.\"-- Provided by publisher.
BOOK
Mystery deepens over speed of Universe's expansion
In an analysis unveiled on 16 July and due to appear in the Astrophysical Journal, a team led by astronomer Wendy Freedman at the University of Chicago in Illinois presented a technique that measures the expansion using red-giant stars. Fittingly, Freedman pioneered the use of the Hubble Space Telescope in the 1990s to measure the Hubble constant, and calculated a value of around 72 with an error margin of around 10%. Scientists with the European Space Agency's Planck mission mapped the relic radiation of the Big Bang, called the cosmic microwave background, and used it to calculate the Universe's basic properties.
Journal Article
Edwin Hubble
\"A lot of people have heard of the Hubble Space Telescope, but many don't know much about the person it's named for. Readers of this illuminating volume will learn all about the man who, in the 1920s, used the largest telescope of the time to discover and learn about other galaxies. This informative biography teaches readers about both history and science. A science project based on Hubble's work invites readers to try their hand at becoming scientists themselves.\"--Amazon.com.
BOOK
Propagation of Tensor Perturbation in Horndeski-like Gravity
Scalar–tensor theories have shown promise in many sectors of cosmology. However, recent constraints from the speed of gravitational waves have put severe limits on the breadth of models such classes of theories can realize. In this work, we explore the possibility of a Horndeski Lagrangian that is equipped with two dilaton fields. The evolution of a two-dilaton coupled cosmology is not well known in the literature. We explore the tensor perturbations in order to assess the behavior of the model against the speed of the gravitational wave constraint. Our main result is that this model exhibits a class of cosmological theories that is consistent with this observational constraint.
Journal Article
Edwin Hubble : genius discoverer of galaxies
\"A biography of twentieth-century American astronomer Edwin Hubble who is renowned for determining that there are other galaxies in the Universe beyond the Milky Way, and for observing that the universe is expanding at a constant rate. Includes related activities for readers\"-- Provided by publisher.
BOOK
COSMOLOGY AND CREATION
When the pope turned to cosmology and the question of the origin and development of the universe, he cited Edwin Hubble's discoveries, which pointed to an expanding universe of finite age. [...]it has confirmed the contingency of the universe and the well-founded deduction as to the epoch when the cosmos came forth from the hands of the Creator. [...]creation took place in time. [...]there is a Creator. Eddington wrote that such a scenario, which seemed to indicate a beginning to the universe, was \"philosophically repugnant.\" Because indicating a beginning to the universe would involve, so he thought, something beyond the realm of scientific explanation, and perhaps indicate a confusion between physics and theology.
Journal Article
The Cosmic Hierarchy of Richard J. Pendergast, SJ: A Thomistic Evaluation
This article offers a Thomistic evaluation of Richard J. Pendergast, SJ’s The Cosmic Hierarchy: The Universe and Its Many Irreducible Levels, situating his integrative cosmology within the ongoing dialog between Christian theology and the natural sciences. Pendergast’s attempt to synthesize Aristotelian-Thomistic metaphysics, process philosophy, and modern physics exemplifies both the promise and the perils of constructing a unified worldview that embraces the theology of creation, teleology, and metaphysical realism. This analysis commends his defense of the intelligibility of nature and the legitimacy of final causality. It also identifies areas where his speculative adoption of process categories departs from Thomistic principles and raises theological difficulties. Engaging questions of creation theology, metaphysics, and epistemology, the paper demonstrates how a Thomistic framework provides critical criteria for assessing integrative cosmologies informed by contemporary science.
Journal Article