When the Earth Had Two Moons: The Lost History of the Night Sky

The untold ancient history of the moon is laid out in this spellbinding science book that blows open much of what we thought we knew about our part of the solar system. Starting from the awe and confusion in 1959 when Soviet scientists photographed the far side of the moon and found it covered with rocky mountains—not the plains and craters that are all we can see from Earth. But why? And how? This gripping book tells a story that spans 14 billion years, containing dramatic explosions and collisions, and opens up many profound questions for generations of planetary scientists to come. 

(This book may contain a sharpie mark on the top or bottom edge and may show mild signs of shelfwear.)