The State of the Universe
Pedro G. Ferreira
320 pages including index
published in 2006
I felt the need to reacquaint myself with modern astrophysics as it has been far too long since I’ve read anything about it. Sure, I do watch The History Channel’s Universe series whever I catch it, but that doesn’t tell me much I don’t know already, while following the vast array of astronomy blogs out there is no real substitute, as they do assume a certain familiarity with the current state of the art. Long live the public library therefore, for providing quick access to what looks like exactly the book I need: The State of the Universe: a Cosmic Primer. Written by Pedro Ferreira, a lecturer in Astrophysics at Oxford, it’s meant as a layperson’s introduction to what astrophysics thinks the universe looks like and what makes it tick.
The State of the Universe is built up logically from first principles. Ferreira starts with a short overview of classical Ptolemaic cosmology, with the Sun revolving around the Earth and how it was succeeded by the heliocentric cosmology of Copernicus and Gallileo. Over several chapters he then shows how our knowledge of the size and complexity of the universe expanded, from what was once thought to be no bigger than our Solar System, through an understanding of how big our Galaxy actually and finally to an appreciation of the idea that all those galaxy shaped nebulas are actually galaxies as well. Then he goes on to the other end of the scale and explains the physics of the universe: the fundamental forces that shape it (gravity, electromagnetism, the strong and weak force), a quick sketch of the whole zoo of the particles that make up the matter and energy in it and how it all sits together. From the classic Big Bang idea of the evolution of the universe he finally moves on to the cutting edge of current physics, where it all gets a lot less clear what’s real and what’s just clever theorising.