Extreme Worlds: The Moon’s Inner Core Revealed

By Todd Ratcliff The Apollo 15 (left) and Apollo 11 (right) lunar laser ranging retroreflector arrays. Image credit: NASA/D. Scott Everyone knows that Earth’s Moon is a cold, dead chunk of rock, right? Hold on there, Sparky, not so fast! While it’s true that it was once thought that the moon was an inert, lifeless […]...

Feb 22, 2011 / More »