'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 Four's The Sky at Night, Best astronomy and space books of 2019: 5/5

All the matter and light we can see in the universe makes up a trivial 5 per cent of everything. The rest is hidden. This could be the biggest puzzle that science has ever faced.

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, but something concealed holds them together. That '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, is pushing it to expand faster and faster. Across the universe, this requires enough energy that the equivalent mass would be nearly fourteen times greater than all the visible material in existence.

Brian Clegg explains this major conundrum in modern science and looks at how scientists are beginning to find solutions to it.

The mysterious phenomena that could unlock the secrets of the universe.

About the Author

Brian Clegg is the editor of popularscience.co.uk and
the author of many books, including most recently Professor Maxwell's
Duplicitous Demon (Icon), Conundrum (Icon) and Are Numbers Real? (St
Martin's Press). His Dice World and A Brief History of Infinity were
both longlisted for the Royal Society Prize for Science Books. Brian has
written for numerous publications including The Times, the Observer,
the Wall Street Journal, BBC Focus and Nature.

Reviews
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 *



Book Information
ISBN 9781785785504
Author Brian Clegg
Format Paperback
Page Count 176
Imprint Icon Books
Publisher Icon Books
Weight(grams) 194g
Dimensions(mm) 198mm * 127mm * 13mm