Ancient Earth, Ancient Skies: The Age of Earth and its Cosmic Surroundings

How old is Earth? How old are the planets, the Moon, meteorites, stars, and the Universe itself? How do scientists know these things? If you’ve ever asked yourself some or all of these questions, then this book is for you.

Planet Earth and the other bodies of the Solar System are 4.5 billion years old. They reside in a galaxy (the Milky Way Galaxy) that is 12-14 billion years old, and are part of a universe that is 13-15 billion years old. G. Brent Dalrymple, a geologist and widely recogniz...