
When the Earth Had Two Moons
Cannibal Planets, Icy Giants, Dirty Comets, Dreadful Orbits, and the Origins of the Night Sky
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Narrated by:
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Adam Verner
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By:
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Erik Asphaug
An astonishing exploration of planet formation and the origins of life by one of the world’s most innovative planetary geologists.
In 1959, the Soviet probe Luna 3 took the first photos of the far side of the Moon. Even in their poor resolution, the images stunned scientists: The far side is an enormous mountainous expanse, not the vast lava plains seen from Earth. Subsequent missions have confirmed this in much greater detail.
How could this be, and what might it tell us about our own place in the universe? As it turns out, quite a lot.
Fourteen billion years ago, the universe exploded into being, creating galaxies and stars. Planets formed out of the leftover dust and gas that coalesced into larger and larger bodies orbiting around each star. In a sort of heavenly survival of the fittest, planetary bodies smashed into each other until solar systems emerged. Curiously, instead of being relatively similar in terms of composition, the planets in our solar system, and the comets, asteroids, satellites, and rings, are bewitchingly distinct. So, too, the halves of our Moon.
In When the Earth Had Two Moons, esteemed planetary geologist Erik Asphaug takes us on an exhilarating tour through the farthest reaches of time and our galaxy to find out why. Beautifully written and provocatively argued, When the Earth Had Two Moons is not only a mind-blowing astronomical tour, but a profound inquiry into the nature of life here - and billions of miles from home.
Supplemental enhancement PDF accompanies the audiobook.
PLEASE NOTE: When you purchase this title, the accompanying PDF will be available in your Audible Library along with the audio.
©2019 Erik Asphaug (P)2019 HarperAudioListeners also enjoyed...




















Not sure how well this book would work if you aren't already interested in planetary science and how our solar system came to be (I could see it going either way), but for those of us already interested this is a fantastic listen.
slow start, but fantastic book
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it's not written in lineal terms exactly and there are several technical phases he could have explained more then once. but I really liked it. first book like this I've had. I thought the author was far very competent obviously and knew his stuff by was casual about and used lots of examples for comparison to what could be complicated info to many.
every work was cool. every matter he touched on was interesting and I am not beyond constantly backing my book up if I fall asleep when I listen at bed time. to much info to miss. highly re6
it was interesting for sure
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From an engineer.
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Interesting
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Latest planetary & astronomical science wellwrittn
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great history
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I only made it halfway
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Poorly written, poorly narrated
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