Here's What We Thought We Knew About the Moon Before Apollo 11

Space has an article titled "Here's What We Thought We Knew About the Moon Before Apollo 11 -- Turns out, the moon isn't fluffy! Before humanity first set foot on the lunar surface, the moon was an elusive rock in our night sky. Scientists weren't sure how it formed or what it was made of, and there was even a common misconception that the moon's surface would be fluffy..."