On September 14, 2015, two black holes that had been spiralling together for over a billion years finally merged — and the ripple they sent through the fabric of spacetime arrived at a pair of detectors in Louisiana and Washington State. The signal lasted less than a fifth of a second. It was the most extraordinary thing humanity had ever detected.

Ripples in Spacetime tells the complete story of gravitational waves: from Einstein's 1916 prediction and his own doubts about it, through Joseph Weber's false dawns and the Hulse-Taylor binary pulsar's indirect proof, to the extraordinary engineering of LIGO and the moment the universe finally spoke.

You'll discover:

Why Einstein predicted gravitational waves — and then spent years trying to prove they didn't exist
How LIGO measures a distance change one thousand times smaller than a proton
What the chirp of GW150914 revealed about two black holes no one knew existed
How the neutron star merger of 2017 forged gold and settled a decades-long debate
Why the 2023 pulsar timing array detection opened an entirely new gravitational wave window
What LISA, the Einstein Telescope, and Cosmic Explorer will find next

This is the story of a hundred-year scientific quest, a machine of almost impossible precision, and a universe far more violent — and far more audible — than anyone imagined.

Ripples in Spacetime is essential reading for anyone who wants to understand one of the greatest scientific achievements of the modern era.

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**Please note our transit times are from the date of dispatch.** We first started out as ?The Paperback Exchange,? a chain of physical bookstores where we would part exchange your beloved books for new stories to transport you to faraway places. However, as shopping started to evolve to online shops and marketplaces, we bid our stores goodbye to become ?PBShop.? This transition has only allowed us to blossom as we now ship thousands of titles to book lovers across the globe. We pride ourselves in being a community of local book lovers which allows our passion and devotion to shine in everything we do. In 2020 we not only celebrated our 20th birthday but our 1st birthday as being completely employee owned after becoming an E.O.T in September 2019. We are proud to be different and embrace standing apart on a book mountain by working from a virtual inventory which allows us to provide thousands of books that may be difficult to get for your bookshelf or your studies. Working with a number of different suppliers allows us to explore other avenues such as puzzles, sheet music and even stationery so we really do have something for everyone. Life is about being versatile in all realms of existence. If this is your first purchase with us, or you are a returning customer, we would like to welcome you to the PBShop family, for there is no friend as loyal as a book. We are a company who put our customers at the centre of everything we do as we understand the importance of reading because once you learn to read, you will forever be free. There are a whole lot of things in this world of ours that we are yet to explore, which is why we will forever inspire curious minds.

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