What If the Moon Drifted 1 km Away Every Second? How Long Until Anyone Noticed

What if the Moon started drifting away from Earth at 1 km every second, starting right now? How long until anyone noticed, and when would we lose it for good? We follow it minute by minute, then day by day. Today the Moon really is leaving us, at about 3.8 cm a year. In this video we speed that up roughly 800 million times. The first people to notice are astronomers bouncing lasers off the mirrors Apollo left behind. Within half an hour, total solar eclipses are gone forever. By day one the tides are down to about half, by day seven to about six percent, and around day thirteen the Moon slips out of Earth's gravitational bubble and becomes a small planet of its own, taking its craters, its lava tubes, six flags, two golf balls and twelve people's footprints with it. Chapters 0:00 The Moon starts leaving 0:45 Who notices first? 1:10 Goodbye, total eclipses 1:45 Hiding in plain sight 3:07 The tides start fading 3:51 The calendar breaks 4:14 The Sun takes over the oceans 4:39 Earth becomes a double planet 5:00 The animals notice 5:46 Day seven 6:38 How far until it's just a dot? 7:21 Day 13: no longer our Moon 7:45 What Earth loses 8:16 What the Moon takes with it 9:30 The last full Moon Sources NASA Moon fact sheet Lunar laser ranging (Apollo retroreflectors) NASA supermoon NOAA, what causes tides Webb's orbit at L2 Hill sphere The Moon and Earth's tilt (Laskar et al., Nature 1993) Dung beetles orient by moonlight (Nature 2003) Atlantic horseshoe crab (USFWS) Lunar lava tube confirmed by radar (Univ. of Trento) Things humans left on the Moon (Royal Museums Greenwich) Numbers like tide strength and apparent size are our own estimates from these sources (tides scale with 1/distance³). #whatif #science #physics