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That spin is the sole reason we have day and night. Let’s get technical for a moment. Earth is a sphere roughly 7,900 miles in diameter. Every 24 hours, it completes one full rotation on its axis—an imaginary line running through the North Pole to the South Pole.
But the sun isn’t actually “rising” or “setting.” The star is standing relatively still. We are the ones moving. how does the earth's rotation cause day and night
If you’re standing at the equator, you’re moving at about 1,037 miles per hour (1,670 km/h). That’s faster than the speed of sound. If you’re closer to the poles, you’re moving slower, like a figure skater near the edge of a slow spin. That spin is the sole reason we have day and night
Because the Earth never stops spinning. And neither does the dance of day and night. Enjoyed this feature? Share it with a friend who still thinks the sun moves. Every 24 hours, it completes one full rotation
The only habitable zone would be a narrow, perpetual twilight ring around the edge—a thin crescent of life in a dead world.
But because the atmosphere, the oceans, and everything on the surface—including you—are spinning along at the same speed, you feel absolutely nothing. No wind in your hair. No dizziness. Just the silent, steady turn of the world. Now, picture a flashlight shining on a baseball in a dark room. One half glows; the other half remains inky black. Earth works the same way, with the sun as that flashlight.
