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The Borde–Guth–Vilenkin (BGV) theorem is a theorem in physical cosmology which deduces that any universe that has, on average, been expanding throughout its history cannot be infinite in the past but must have a past spacetime boundary. [1]
Cosmic View: The Universe in 40 Jumps is a 1957 book by Dutch educator Kees Boeke that combines writing and graphics to explore many levels of size and structure, from the astronomically vast to the atomically tiny. The book begins with a photograph of a Dutch girl sitting outside a school and holding a cat.
Tired light hypothesis vs. expanding universe. The Tolman surface brightness test is one out of six cosmological tests that were conceived in the 1930s to check the viability of and compare new cosmological models. Tolman's test compares the surface brightness of galaxies as a function of their redshift (measured as z).
The First Three Minutes attempts to explain the early stages of the universe after the Big Bang.Weinberg begins by recounting a creation myth from the Younger Edda and goes on to explain how, in the first half of the twentieth century, cosmologists have come to know something of the real history of the universe.
Astrophysics for People in a Hurry is a 2017 popular science book by Neil deGrasse Tyson, centering around a number of basic questions about the universe. Published on May 2, 2017, by W. W. Norton & Company , the book is a collection of Tyson's essays that appeared in Natural History magazine at various times from 1997 to 2007.
The Universe for Beginners, republished as Introducing the Universe, is a 1993 graphic study guide to cosmology written by Felix Pirani and illustrated by Christine Roche.The volume, according to the publisher's website, "recounts the revolutions in physics and astronomy," from "Aristotle to Newton," and, "Einstein to Quantum Mechanics," "that underlie the present-day picture of the universe."
Space Atlas: Mapping the Universe and Beyond is a National Geographic book written by American physicist James S. Trefil, Robinson Professor of Physics at George Mason University in 2012. It is subdivided into three parts, including photography, star charts, and general information surrounding the Solar System , the Milky Way galaxy , and the ...
In physics, a pregeometry is a hypothetical structure from which the geometry of the universe develops. Some cosmological models feature a pregeometric universe before the Big Bang. The term was championed by John Archibald Wheeler in the 1960s and 1970s as a possible route to a theory of quantum gravity .