According to NASA, Earth's radius at the equator is 3,963 miles (6,378 kilometers), while the radius at the poles is 3,950 miles (6,356 km). Therefore, the diameter of Earth through its center is ...

This satellite can be found orbiting at a distance of 385,000 km, which is about 60 times larger than Earth’s radius. ... The bulge at the center is roughly 12,000 light-years in diameter.

Let's say we want to build a model of the sun and Earth alone. Earth has a radius of about 6,371 kilometers (3,959 miles), but let's represent this with a marble 1 centimeter in diameter.

That radius would be about 9680 kilometers (Earth is 6670 km). If our planet was 50% larger in diameter [while maintaining the same density], we would not be able to venture into space, at least using ...

You might think the modern way to measure the radius of the Earth is to just look it up. Not so fast. Really, the fun isn't in knowing the answer; the fun is in getting the answer.