Join esteemed planetary geologist Erik Asphaug on an exhilarating journey through the fascinating history of our solar system in When the Earth Had Two Moons. This expert guide explores not just the formation of planets but also the intriguing origins of life itself. With beautifully penned prose, Asphaug invites readers to understand how our universe became the extraordinary place it is today.
In 1959, the Soviet probe Luna 3 brought to light the stark contrast between the moon's two hemispheres, revealing a rugged, mountainous far side dramatically different from the smooth, lava plains facing Earth. This discovery raises questions about the forces at play in our cosmic neighborhood and what these differences can teach us about our own planet and its history. Why did planets develop such distinct personalities, and how did they evolve over billions of years?
Asphaug tells the story of planetary formation that began over fourteen billion years ago, when the universe erupted into existence. From the explosive birth of galaxies and stars grew solar systems from debris—dust and gas coalescing into larger bodies orbiting vast suns. Planetary bodies collided and merged, giving rise to the solar system as we know it. Rather than being uniform in composition, our planets, comets, and moons showcase a dazzling variety of features and elements, compelling us to ponder our own origins and the nature of life.
Through exquisite storytelling and thought-provoking arguments, When the Earth Had Two Moons presents a captivating view of our universe—an inquiry that challenges readers to reflect on their existence and the mysteries of life on planet Earth. Asphaug’s expert insights invite readers of all backgrounds to engage with the wonders of space and the profound questions that arise from our exploration of it.
