When a spent rocket stage fell silently onto the Moon on August 5, it left behind more than a crater — it left a record of what lies beneath the lunar surface, and a demonstration of how quietly effective international cooperation in space has become. NASA's Lunar Reconnaissance Orbiter captured the 18-meter scar six days after impact, its cameras threading a narrow window of timing and geometry 60 miles above the surface. What began as orbital debris became, in the hands of scientists from multiple nations and continents, an unexpected lesson in lunar geology and the patient art of watching t