Search
Log in
  • Home

  • Categories

  • Audiobooks

  • E-books

  • For kids

  • Top lists

  • Help

  • Download app

  • Use campaign code

  • Redeem gift card

  • Try free now
  • Log in
  • Language

    🇫🇮 Suomi

    • FI
    • EN

    🇧🇪 Belgique

    • FR
    • EN

    🇩🇰 Danmark

    • DK
    • EN

    🇩🇪 Deutschland

    • DE
    • EN

    🇪🇸 España

    • ES
    • EN

    🇫🇷 France

    • FR
    • EN

    🇳🇱 Nederland

    • NL
    • EN

    🇳🇴 Norge

    • NO
    • EN

    🇦🇹 Österreich

    • AT
    • EN

    🇨🇭 Schweiz

    • DE
    • EN

    🇸🇪 Sverige

    • SE
    • EN
  1. Books
  2. Natural sciences
  3. Physics and chemistry

Read and listen for free for 42 days!

Cancel anytime

Try free now
4.1(15)

Extraterrestrial : The First Sign of Intelligent Life Beyond Earth

New York Times Bestseller | Wall Street Journal Bestseller | Publishers Weekly Bestseller | Publishers Marketplace 2020 Buzz Book | Amazon Best Book of the Year | Longlisted for the 2022 PEN/E.O. Wilson Literary Science Writing Award

“Provocative and thrilling ... Loeb asks us to think big and to expect the unexpected.”

—Alan Lightman, New York Times bestselling author of Einstein’s Dreams and Searching for Stars on an Island in Maine

Harvard’s top astronomer lays out his controversial theory that our solar system was recently visited by advanced alien technology from a distant star.

In late 2017, scientists at a Hawaiian observatory glimpsed an object soaring through our inner solar system, moving so quickly that it could only have come from another star. Avi Loeb, Harvard’s top astronomer, showed it was not an asteroid; it was moving too fast along a strange orbit, and left 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 controversial theory and its profound implications: for science, for religion, and for the future of our species and 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.


Author:

  • Avi Loeb

Narrator:

  • Robert Petkoff

Format:

  • Audiobook

Duration:

  • 7 h 7 min

Language:

English

Categories:

  • Natural sciences
  • Physics and chemistry
  • Natural sciences
  • Technology
  • Natural sciences
  • Astronomy

More by Avi Loeb

Skip the list
  1. Elämää avaruudessa : Miksi on todennäköistä, ettemme ole yksin maailmankaikkeudessa

    Avi Loeb

    audiobookbook
  2. Interstellar : The Search for Extraterrestrial Life and Our Future in the Stars

    Avi Loeb

    audiobook
  3. Liv i rymden: Sökandet efter utomjordiskt liv och vår framtid på andra planeter

    Avi Loeb

    book
  4. Er vi alene?: Beretningen om det første tegn på intelligent liv i rummet

    Avi Loeb

    audiobookbook
  5. Utomjordiskt : De första tecknen på intelligent liv

    Avi Loeb

    book

Others have also read

Skip the list
  1. The Monster Enters

    Mike Davis

    audiobook
  2. Chasing Ghosts, Texas Style : On the Road with Everyday Paranormal

    Brad Klinge

    audiobook
  3. Maps of Consciousness : The Classic Text on Exploring the Mind and Expanding Awareness

    Ralph Metzner

    audiobook
  4. Myths and Mysteries of Archaeology

    Susan Johnston

    audiobook
  5. Our Gigantic Zoo

    Thomas M. Lekan

    audiobook
  6. The Book of Animal Secrets: Nature's Lessons for a Long and Happy Life

    David B. Agus

    audiobook
  7. The Jesuit and the Skull

    Amir D. Aczel

    audiobook
  8. The Modern Witchcraft Book of Astrology: Your Complete Guide to Empowering Your Magick with the Energy of the Planets

    Julia Halina Hadas

    audiobook
  9. Inversión para principiantes: Minimiza el riesgo, maximiza los rendimientos, haz crecer tu riqueza y alcanza la libertad financiera a través del mercado de valores, fondos indexados, comercio de opciones, criptodivisas, bienes raíces y más.

    Samuel Feron

    audiobook
  10. The Three Edwards : The Plantagenets Series

    Thomas Bertram Costain

    book
  11. The New Apartheid

    Sizwe Mpofu-Walsh

    audiobook
  12. Russia in Flames

    Laura Engelstein

    audiobook

  • 6 books

    Avi Loeb

    ABRAHAM (AVI) LOEB is the Frank B. Baird, Jr., Professor of Science at Harvard University, chair of Harvard’s Department of Astronomy, founding director of Harvard’s Black Hole Initiative, and director of the Institute for Theory and Computation (ITC) within the Harvard-Smithsonian Center for Astrophysics. He also chairs the Advisory Committee for the Breakthrough Starshot Initiative, and serves as the science theory director for all Initiatives of the Breakthrough Prize Foundation, as well as chair of the Board on Physics and Astronomy of the National Academies. Author of four books and over 700 scientific papers, Loeb is an elected fellow of the American Academy of Arts & Sciences, the American Physical Society, and the International Academy of Astronautics. In 2012, Time selected Loeb as one of the twenty-five most influential people in space.

    Read more

Help and contact


About us

  • Our story
  • Career
  • Press
  • Accessibility
  • Partner with us
  • Investor relations
  • Instagram
  • Facebook

Explore

  • Categories
  • Audiobooks
  • E-books
  • Magazines
  • For kids
  • Top lists

Popular categories

  • Crime
  • Biographies and reportage
  • Fiction
  • Feel-good and romance
  • Personal development
  • Children's books
  • True stories
  • Sleep and relaxation

Nextory

Copyright © 2025 Nextory AB

Privacy Policy · Terms ·
Excellent4.3 out of 5