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The physical universe is defined as all of space and time [a] (collectively referred to as spacetime) and their contents. [10] Such contents comprise all of energy in its various forms, including electromagnetic radiation and matter, and therefore planets, moons, stars, galaxies, and the contents of intergalactic space.
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]
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.
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 ...
Horizons: Exploring the Universe is an astronomy textbook that was written by Michael A. Seeds and Dana E. Backman. It is in its 14th edition (as of 2019 [update] ), and is used in some colleges as a guide book for introductory astronomy classes.
You Are the Universe: Discovering Your Cosmic Self and Why It Matters is a philosophy book co-written by Deepak Chopra and Menas Kafatos. The book delves into questions pertaining to existence, human existence, consciousness, reality and perception.
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 .