'An astronomical Sherlock Holmes' WASHINGTON POST 'Visionary' STEPHEN GREENBLATT 'Compelling . The book is not so much a claim for one object as an argument for a more open-minded approach to science - a combination of humility and wonder' NEW STATESMAN 'So interesting. I recommend [ Extraterrestrial ] to people who have any interest in this extraordinary subject of life existing in other places than on Earth.' WILLIAM SHATNER (from Amazon.com) Harvard's top astronomer takes us inside the mind-blowing story of the first interstellar visitor to our solar system In late 2017, scientists at a Hawaiian observatory glimpsed a strange object soaring through our inner solar system. Astrophysicist Avi Loeb conclusively showed it was not an asteroid; it was moving too fast along a strange orbit, and leaving no trail of gas or debris in its wake. There was only one conceivable explanation: the object was a piece of advanced technology created by a distant alien civilization. In Extraterrestrial , Loeb takes readers inside the thrilling story of the first interstellar visitor to be spotted in our solar system.

He outlines his theory and its profound implications: for science, for religion, and for the future of our planet. A mind-bending journey through the furthest reaches of science, space-time, and the human imagination, Extraterrestrial challenges readers to aim for the stars-and to think critically about what's out there, no matter how strange it seems.