Wow! eBook
The Light/Dark Universe: Light from Galaxies, Dark Matter and Dark Energy
Author(s): James M Overduin (Author), Paul S Wesson (Author)
- Publisher: World Scientific Publishing
- Publication Date: 20 Oct. 2008
- Edition: illustrated edition
- Language: English
- Print length: 225 pages
- ISBN-10: 9812834419
- ISBN-13: 9789812834416
Book Description
To the eyes of the average person and the trained scientist, the night sky is dark, even though the universe is populated by myriads of bright galaxies. Why this happens is a question commonly called Olbers Paradox, and dates from at least 1823. How dark is the night sky is a question which preoccupies astrophysicists at the present. The answer to both questions tells us about the origin of the universe and the nature of its contents luminous galaxies like the Milky Way, plus the dark matter between them and the mysterious dark energy which appears to be pushing everything apart. In this book, the fascinating history of Olbers Paradox is reviewed, and the intricate physics of the light/dark universe is examined in detail. The fact that the night sky is dark (a basic astronomical observation that anybody can make) turns out to be connected with the finite age of the universe, thereby confirming some event like the Big Bang. But the space between the galaxies is not perfectly black, and data on its murkiness at various wavelengths can be used to constrain and identify its unseen constituents.
Editorial Reviews
Review
This book is fitting for a graduate audience, but its theme and concept are inspiring and it describes a fantastic example of the power of observation. –Times Higher Education
