The surface of the moon is a galactic time capsule
Paul Sutter writes: You wouldn’t know it by looking at it, but the moon is a time capsule. Its surface has been completely exposed to vacuum for almost 4.5 billion years; meanwhile, it has been soaked by particles from the sun and beyond the solar system. Those particles remain, buried under the lunar surface, providing a detailed record of the history of our solar system and even our entire galaxy. It’s all right there. We just need to dig it…