What is the exact circumference of the earth?

What is the exact circumference of the earth?

The distance between the north and south poles is approximately 7900 miles while the equatorial diameter is slightly larger at 7930 miles. The circumference of the Earth is just its average diameter, 7915 miles, times the number pi, where pi is 3.14159. This gives us about 25,000 miles for the Earth’s circumference.

Is the circumference of the Earth 8000 miles?

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).

How many miles is the world around?

Using those measurements, the equatorial circumference of Earth is about 24,901 miles (40,075 km). However, from pole to pole — the meridional circumference — Earth is only 24,860 miles (40,008 km) around. Our planet’s shape, caused by the flattening at the poles, is called an oblate spheroid.

What is the circumference of the equator?

The distance around Earth at the Equator, its circumference, is 40,075 kilometers (24,901 miles).

How was the Earth first measured?

Eratosthenes then measured the angle of a shadow cast by a stick at noon on the summer solstice in Alexandria, and found it made an angle of about 7.2 degrees, or about 1/50 of a complete circle. He realized that if he knew the distance from Alexandria to Syene, he could easily calculate the circumference of Earth.

How old is Earth?

Earth is estimated to be 4.54 billion years old, plus or minus about 50 million years. Scientists have scoured the Earth searching for the oldest rocks to radiometrically date. In northwestern Canada, they discovered rocks about 4.03 billion years old.

How fast does Earth spin?

With this information, to work out how fast Earth is spinning we need only our planet’s circumference. At the equator, its circumference is roughly 40,075 kilometres, so dividing this by the length of day means that, at the equator, Earth spins at about 1670 kilometres per hour.

How thick is Earth?

Earth’s crust varies in thickness from 35 to 70 kilometers (22 to 44 miles) in the continents and 5 to 10 kilometers (3 to 6 miles) in the ocean basins.

How fast does the Earth rotate?

The earth rotates once every 23 hours, 56 minutes and 4.09053 seconds, called the sidereal period, and its circumference is roughly 40,075 kilometers. Thus, the surface of the earth at the equator moves at a speed of 460 meters per second–or roughly 1,000 miles per hour.

How heavy is the Earth?

What is Earth made of?

Earth is composed of four main layers, starting with an inner core at the planet’s center, enveloped by the outer core, mantle, and crust. The inner core is a solid sphere made of iron and nickel metals about 759 miles (1,221 kilometers) in radius.

What is the real shape of the Earth?

The Earth is an irregularly shaped ellipsoid. While the Earth appears to be round when viewed from the vantage point of space, it is actually closer to an ellipsoid.

Which country is closest to the equator?

The countries near the equator include Ecuador, Colombia, Brazil, Gabon, Republic of the Congo, Uganda, Kenya, Somalia, Maldives, and Indonesia.

Why is it called equator?

The name is derived from medieval Latin word aequator, in the phrase circulus aequator diei et noctis, meaning ‘circle equalizing day and night’, from the Latin word aequare ‘make equal’.

Why is the equator called 0 degrees?

The equator represents the zero degree latitude. Since the distance from the equator to either of the poles is one-fourth of a circle round the earth, it will measure ¼th of 360 degrees, i.e. 90°. Thus, 90 degrees north latitude marks the North Pole and 90 degrees south latitude marks the South Pole. Q.

Who named Earth?

All of the planets, except for Earth, were named after Greek and Roman gods and godesses. The name Earth is an English/German name which simply means the ground. It comes from the Old English words ‘eor(th)e’ and ‘ertha’.

Who is the father of geography?

Eratosthenes, the ancient Greek scholar is called the ‘father of geography. He was the first one to use the word geography and he also had a small-scale notion of the planet that helped him to determine the circumference of the earth. About Eratosthenes: Eratosthenes was multi-talented.

Who discovered Earth planet?

Earth was never formally ‘discovered’ because it was never an unrecognized entity by humans. However, its shared identity with other bodies as a “planet” is a historically recent discovery. The Earth’s position in the Solar System was correctly described in the heliocentric model proposed by Aristarchus of Samos.

Why is circumference 360?

Another way to think of the curve that encloses a circle is through the 360 degree arc of that curve. Thus, the circumference of a circle is the length of the 360 degree arc of that circle.

What is the exact area of the Earth?

Total Surface Area: about 509 600 000 square km (197 000 000 square miles). Area of land: 148 326 000 km2 (57 268 900 square miles), this are 29% of the total surface of Planet Earth. Area of water: 361 740 000 km2 (139 668 500 square miles), this are 71% of the total surface of the Earth.

What is Earth’s exact weight?

(Inside Science) — The Earth isn’t even close to being the largest planet in our solar system, but it’s also no lightweight, weighing in at a whopping 13 thousand, 170 billion trillion pounds, or 13,170,000,000,000,000,000,000,000.

Why is Earth 23 degrees?

The axis of rotation of the Earth is tilted at an angle of 23.5 degrees away from vertical, perpendicular to the plane of our planet’s orbit around the sun. The tilt of the Earth’s axis is important, in that it governs the warming strength of the sun’s energy.