The radius of Earth at the equator is 3,963 miles (6,378 kilometers), according to NASA’s Goddard Space Flight Center . However, Earth is not quite a sphere. The planet’s rotation causes it to bulge at the equator. Earth’s polar radius is 3,949 miles (6,356 km) — a difference of 14 miles (22 km).

## Why is the Earth radius at the equator is larger than at the poles?

Earth bulges out a bit more around the equator than around the poles because of its rotation (spin).

Which is bigger equatorial or polar?

Equatorial vs Polar Diameter: Because of this, the diameter of the Earth at the equator is about 43 kilometers (27 mi) larger than the pole-to-pole diameter. As a result, the latest measurements indicate that the Earth has an equatorial diameter of 12,756 km (7926 mi), and a polar diameter of 12713.6 km (7899.86 mi).

### How much is the polar diameter of the earth different from the equatorial diameter?

The difference in axes is about 1 part in 300. This means the earth’s equatorial diameter is 7,926 miles, while its polar diameter is 7,900 miles. Although the difference between equatorial and polar diameters is only 26 miles, the oblate shape of the earth complicates geographical matters.

The Earth’s equatorial radius a, or semi-major axis, is the distance from its center to the equator and equals 6,378.1370 km (3,963.1906 mi). The equatorial radius is often used to compare Earth with other planets.

Why is the equatorial diameter bigger than the polar diameter?

Because the Earth rotates, centrifugal forces push the equator outward. This is referred to as the Earth’s oblateness. This results in the Earth having a polar circumference of 40008 km, and an equatorial circumference of 40075 km, a difference of 67 kilometers.

3,958.8 mi

## How much does the Earth bulge at the equator?

Scientists can calculate the diameter of latitudes, such as the Equator and Arctic Circle. The Earth’s diameter at the Equator is about 12,756 kilometers (7,926 miles). At the poles, the diameter is about 12,714 kilometers (7,900 miles). The Earth’s equatorial bulge is about 43 kilometers (27 miles).

Why is equatorial diameter longer than the polar diameter?

### Why is equatorial diameter greater than polar diameter?

Note: The equator is at 0∘ latitude and at the half way between south pole and the north pole. The earth is widest at the equator that means the diameter of the earth at the equator is largest. Also the diameter of the earth at the equator is about 43 km (27 miles) times greater than the diameter across pole-to-pole.

The radius of Earth at the equator is 3,963 miles (6,378 kilometers), according to NASA’s Goddard Space Flight Center in Greenbelt, Maryland. However, Earth is not quite a sphere. The planet’s rotation causes it to bulge at the equator. Earth’s polar radius is 3,950 miles (6,356 km) — a difference of 13 miles (22 km).

What is equatorial diameter of the earth?

7,917.5 mi
Earth/Diameter

## What is the radius of the Earth from the equator?

Earth radius is the distance from the center of Earth to a point on its surface. Its value ranges from 6,378 km (3,963 mi) at the equator to 6,357 km (3,950 mi) at a pole. A nominal Earth radius is sometimes used as a unit of measurement in astronomy and geophysics, denoted in astronomy by the symbol R⊕.

## Which is larger the Earth’s equatorial or polar circumference?

Earth’s equatorial diameter is 7,926 miles (12,756 kilometers), but from pole to pole, the diameter is 7,900 miles (12,720 km) — a difference of only 40 miles (64 km).

What is the nominal radius of the Earth?

In astronomy, the International Astronomical Union denotes the nominal equatorial Earth radius as, which is defined to be 6,378.1 km (3,963.2 mi). The nominal polar Earth radius is defined as = 6,356.8 km (3,949.9 mi).

### How big is the circumference of the Earth?

However, Earth is not quite a sphere. The planet’s rotation causes it to bulge at the equator. Earth’s polar radius is 3,950 miles (6,356 km) — a difference of 13 miles (22 km). Using those measurements, the equatorial circumference of Earth is about 24,901 miles (40,075 km).