Universe of Earths

Planet Earth has been a familiar concept for a mere fraction of recorded history. Until about the mid-1600s, most humans thought of Earth as immobile, likely either dim or simply invisible from the Moon or anywhere else in the heavens, and not (like the planets) participating in what Galileo called "e;the dance of the stars."e; A Universe of Earths: Our Planet and Other Worlds, from Copernicus to ...