If Earth Spun Twice as Fast, Days Would Be 12 Hours

Spin the Earth twice as fast, and your day would shrink to just twelve hours.

Right now, the equator already races at over 1,600 kilometers per hour. Double the spin, and every point on the planet would be flung around at breakneck speed.

Faster rotation would reshape almost everything. The extra outward force at the equator would fight gravity a little harder, so you'd actually weigh slightly less there than at the poles. The planet would bulge fatter around its middle. And the atmosphere would go wild. Earth's spin steers our winds and storms through the Coriolis effect, so doubling it would whip hurricanes into tighter, faster, more ferocious spirals. It wouldn't fling you off the ground, our gravity is far too strong for that, but it would make the whole planet a far stormier place.

To actually cancel gravity at the equator and float, Earth would need to spin not twice, but about seventeen times faster, turning a full day into just ninety minutes.

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