If the Moon Moved Twice as Close, Tides Would Be 8x Stronger

Pull the Moon to half its distance, and the tides wouldn't just rise. They'd swallow cities.

The Moon sits about 384,000 kilometers away. Now imagine it at half that. In our sky, it would loom twice as wide, a pale giant overhead.

But the real danger is the tides, and the math is vicious. Tidal pull doesn't fade with simple distance. It fades with distance cubed. So halving the gap doesn't double the tides, it multiplies them by eight. Coastlines that see a gentle rise today would face walls of water surging in and out twice a day, drowning port cities on every high tide. Yet the Moon would still be far outside the zone where our gravity could rip it apart, so it would survive, intact and menacing.

And it wouldn't stay put. Those monster tides would drag on Earth's spin like a brake, slowly stretching our day longer over millions of years.

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