Alien Earths: The New Science of Planet Hunting in the Cosmos

4.3 4.3 out of 5 stars | 33 ratings

Price: 13.12

Last update: 05-18-2024


About this item

This program features an introduction and epilogue read by the author.

"In the grand tradition of Carl Sagan and Neil deGrasse Tyson, we now have a new tour guide to the cosmos."―Charles Cockell, Professor of Astrobiology, University of Edinburgh

"Absorbing, informative, and entertaining."―Kirkus (starred)

Riveting and timely, a look at the research that is transforming our understanding of the cosmos in the quest to discover whether we are alone.

For thousands of years, humans have wondered whether we're alone in the cosmos. Now, for the first time, we have the technology to investigate. But once you look for life elsewhere, you realize it is not so simple. How do you find it over cosmic distances? What actually is life?

As founding director of Cornell University's Carl Sagan Institute, astrophysicist Lisa Kaltenegger has built a team of tenacious scientists from many disciplines to create a specialized toolkit to find life on faraway worlds. In Alien Earths, she demonstrates how we can use our homeworld as a Rosetta Stone, creatively analyzing Earth's history and its astonishing biosphere to inform this search. With infectious enthusiasm, she takes us on an eye-opening journey to the most unusual exoplanets that have shaken our worldview—planets covered in oceans of lava, lonely wanderers lost in space, and others with more than one sun in their sky! And the best contenders for Alien Earths. We also see the imagined worlds of science fiction and how close they come to reality.

With the James Webb Space Telescope and Dr. Kaltenegger’s pioneering work, she shows that we live in an incredible new epoch of exploration. As our witty and knowledgeable tour guide, Dr. Kaltenegger shows how we discover not merely new continents, like the explorers of old, but whole new worlds circling other stars and how we could spot life there. Worlds from where aliens may even be gazing back at us. What if we're not alone?

A Macmillan Audio production from St. Martin’s Press.


Top reviews from the United States

Jack Waldbewohner
5.0 out of 5 stars A Magical Book Written By A Special Scientist
Reviewed in the United States on April 25, 2024
Lisa was born in Austria. She began her life speaking German. Only much later in life did she learn English and move to the United States where she ended up on the faculty of Cornell University, This is a short book. It is written in perfect English. I learned so much about our universe and exoplanets. I am sure that we are not alone. After reading this book, I do not doubt that we are not alone in the universe. I also got a first-hand account of how challenging it is for a woman to be in a male-dominated world. This is a great read. It is worth the investment of time to read it. You will learn so much! I recommended this book to a woman astronomer friend of mine.
Jeff
3.0 out of 5 stars A Less Than Satisfying Exploration of The Search for Exoplanets and Alien Life
Reviewed in the United States on May 8, 2024
First thing. This is a very engaging book by a scientist in a fascinating field of study. The book has some excellent anecdotes and tangential stories. The problems I had when reading it were twofold. First, there is a certain stream of consciousness feel to the book as it flits around from one topic to another in a rather eccentric order. For example, the discussion of the creation of the universe comes last in the book. There also are topics the reappear at random places throughout the book. Second, I was disappointed at the lack of scientific detail. Here is one of the world’s preeminent scientists in this field and the level of scientific detail is probably at the junior high school level. I think the author underestimates the lay audience for this topic. All that being said, like Carl Sagan, the author does an excellent job communicating her wonder and the joy of exploration.
HistoryNerdsUnited
4.0 out of 5 stars Not Just for Science Nerds
Reviewed in the United States on May 6, 2024
There is no thinner line than the one between talking down to people about science and explaining it in a way that everyone can understand. Lisa Kaltenegger wonderfully stays on the latter side in her book, Alien Earths. It is also possible that I am the lowest common denominator and it's impossible to insult my intelligence when it comes to science. No matter!

Kaltenegger tells an engaging story which revolves around a basic idea. Is there any earths out there like ours? Her answer: maybe! So what do we need the book for? Well, Kaltenegger to take the next steps to explain what are the conditions needed for those earths, what would it be like on those planets, and do we even have any indication they exist. Along the way, she gets in some good jokes and her love for this subject truly shines through.

Depending on your love of science, you may find this to be a must read or it may lose some steam by the end. While I enjoyed all of it, the concluding chapters start to feel a bit repetitive. There are also some memoir type tangents that range from perfectly placed to completely misplaced. These are small issues and the good of the book well outweighs any faults.

(This book was provided as an advance copy by Netgalley and St. Martin's Press.)
Kelly Gottschalk
5.0 out of 5 stars Great introduction to astrobiology and the possibility of life on other worlds
Reviewed in the United States on April 16, 2024
Lisa Kaltenegger’s Alien Earths is a great introductory book to astrobiology, the evolution of the universe and the possibilities of space exploration. This book wouldn’t be for someone with extensive knowledge of the subject matter, but she does a great job explaining concepts in a way that is familiar to the average person that might be curious about the potential for extraterrestrial life that would find denser books overwhelming. Even as someone with a fascination for outer space that regularly reads and listens to astronomy news, I found this helpful in the way it pulled information together. The majority of the book is about how life evolved or could have evolved on Earth, and what different circumstances could allow life to form. While I understand the concept of space and time, and how the light we see on Earth was emitted in the past from its origin, this takes on increased meaning in the search for life. Most stars observing the light from our sun are doing so from far enough away that we didn’t have the technology we do now - a time in their future. So it is for us to when we’re observing alien planets in our quest to find other life.

Several other impactful observations she makes that I want to highlight are the diversity of input in the search for life. In this she means both the value people in a variety of disciplines can contribute, and the variety of different genders, cultures, religions, etc. I found it so impressive that the head of her research team (a man) turned down her offer to go make copies of their PowerPoint presentation and delayed the presentation so he could do it himself and not put her as a woman in a position to be viewed as a secretary incredibly powerful, and a thing that often gets overlooked.

The other thing is that when you think about it and view Earth from the universal perspective and not the lowly human standing on the Earth’s surface, it really is like we’re on a spaceship hurtling through the universe and we are lucky enough that our spaceship sustains us rather well. But as any astronaut could tell you, they spend a lot of time doing maintenance to avoid crucial things breaking, something we should consider on our journey on Spaceship Earth.

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