Dark Matter and Dark Energy

The Hidden 95% of the Universe

Brian Clegg

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English

Icon Books
08 August 2019

Mathematics & Sciences; Popular science; Popular astronomy & space

Series: Hot Science

All the matter and light we can see in the universe makes up a trivial five per cent of everything. The rest is hidden.

Since the 1970s, astronomers have been aware that galaxies have far too little matter in them to account for the way they spin around: they should fly apart like clay off a potter's wheel, but something concealed holds them together. This 'something' is dark matter - invisible material in five times the quantity of the familiar stuff of stars and planets. By the 1990s we also knew that the expansion of the universe was accelerating. Something, named dark energy, was pushing it to expand faster and faster. Across the universe, this requires enough energy that the equivalent mass would be nearly 14 times greater than all the known material in existence.

With dark matter and dark energy making up 95 per cent of reality, cosmologists have uncovered the biggest puzzle that science has ever faced.

By: Brian Clegg
Imprint: Icon Books
Country of Publication: United Kingdom
Dimensions: Height: 198mm, Width: 127mm, Spine: 13mm
Weight: 194g
ISBN: 9781785785504
ISBN 10: 1785785508
Series: Hot Science
Pages: 176
Publication Date: 08 August 2019
Audience: General/trade , ELT Advanced
Format: Paperback
Publisher's Status: Unspecified

Brian Clegg is a science writer whose many books include Dice World and A Brief History of Infinity, both of which were longlisted for the Royal Society Prize for Science Books. He has written for numerous publications including The Wall Street Journal, Nature, BBC Focus, The Times and The Observer.

Reviews for Dark Matter and Dark Energy: The Hidden 95% of the Universe

Clear and compact ... It's hard to fault as a brief, easily digestible introduction to some of the biggest questions in the Universe -- Giles Sparrow, BBC Sky at Night * Best astronomy and space books of 2019: 5/5 *