# What is the exact circumference of the earth?

## What is the exact circumference of the earth?

roughly 40,000 kilometers
Observations and results In 200 B.C. Eratosthenes estimated Earth’s circumference at about 46,250 kilometers (28,735 miles). Today we know our planet’s circumference is roughly 40,000 kilometers (24,850 miles).

### How was the circumference of the Earth calculated?

You can figure out the earth’s circumference using a geometric formula that’s over 2,000 years old! Eratosthenes divided 360° by 7.2° and got 50, which told him that the distance between Alexandria and Syene (500 miles) was 1/50 of the total distance around the Earth.

#### What is the circumference of the Earth around the equator?

40,075 kilometers
The distance around the Earth at the Equator, its circumference, is 40,075 kilometers (24,901 miles). The Earth’s diameter is also wider at the Equator, creating a phenomenon called an equatorial bulge.

What is Earth diameter and circumference?

Earth’s circumference (the distance all the way around the equator) is 24,901 miles (40,075 kilometers). Its diameter (the distance from one side to the other through Earth’s center) is 7,926 miles (about 12,756 kilometers).

What is the circumference of the earth for kids?

Quick Facts

Ninja Column 1 Ninja Column 2
Equatorial Circumference: 40,030 km
Polar Diameter: 12,714 km
Equatorial Diameter: 12,756 km
Mass: 5,972,190,000,000,000 billion kg

## What’s the circumference of the sun?

2.720984 million mi
Sun/Circumference

### Can you feel the Earth spin?

Bottom line: We don’t feel Earth rotating on its axis because Earth spins steadily – and moves at a constant rate in orbit around the sun – carrying you as a passenger right along with it.

#### Where is the earth’s circumference greatest?

the equator
Where is the Earth’s Circumference the Greatest? As the shape of the earth is an oblate spheroid, the diameter is different at the equator and at the poles. Since the diameter at the equator is greater than the diameter at the poles, hence, the circumference of the great circle at the equator is the greatest.

How far is Earth from space?

Experts have suggested the actual boundary between Earth and space lies anywhere from a mere 18.5 miles (30km) above the surface to more than a million miles (1.6 million km) away.

Does the circumference of the earth change?

The circumference changes depending on where you measure it. The Earth’s meridional circumference is 40,008 km, and its average circumference is 40,041 km. In other words, if you drove your car around the equator of the Earth, you would drive an extra 67 km than you would if you drove from pole to pole to pole.

## What is the circumference of sun?

### Is Planet Earth kid friendly?

The Planet Earth Kids ages six and up will gain a wealth of knowledge about wildlife, nature, and the circle of life through this beautifully shot series from BBC. Some scenes are a little on the violent side with predator versus prey action.

#### How to calculate Earth’s circumference?

The circumference of the Earth can be calculated using the formula, Circumference = 2 πR or π D , where R is the radius of Earth and D is the diameter. By knowing the Equatorial diameter or the polar diameter of the Earth, the circumference can be found.

How do we measure the circumference of Earth?

Set up your meter stick vertically, outside in a sunny spot just before solar noon. If you have a volunteer to help, have them hold the meterstick. If you have a post level or plumb bob, use it to make sure the meterstick is perfectly vertical. At solar noon, mark the end of the meterstick’s shadow on the ground with a stick or a rock.

What do scientist calculated the Earth’s circumference?

The earth, as we said, is an oblate spheroid, so geodesists (scientists who measure the earth and its position in space) have measured and calculated the average of earth’s circumference as 40,075 km or 24,901 mi. Eratosthenes, some 2,200 years ago, was off by only 125 km or 101 mi.

## How is the Earth’s circumference calculated?

Eratosthenes divided 360° by 7.2° and got 50, which told him that the distance between Alexandria and Syene (500 miles) was 1/50 of the total distance around the Earth. So he multiplied 500 by 50 to arrive at his estimate of the Earth’s circumference: 25,000 miles.