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Why earth is so small

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Why earth is so small
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Meghna Thapar 5 years, 1 month ago

Earth has a diameter of roughly 8,000 miles (13,000 kilometers) and is round because gravity pulls matter into a ball. But, it's not perfectly round. Earth is really an "oblate spheroid," because its spin causes it to be squashed at its poles and swollen at the equator. But Earth's size isn't quite constant. Space around Earth is dusty; it's full of asteroid debris, comet trails and ionized particles streaming away from the sun. And as our planet flies through that dust, our gravity vacuums it up. ... So, overall, Earth is getting smaller.

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