What is the real diameter of Earth?

What is the real diameter of Earth?

The diameter of a circle is twice the radius, giving us a diameter for Earth of 12,756 km. Note: The Earth is almost, but not quite, a perfect sphere. Its equatorial radius is 6378 km, but its polar radius is 6357 km – in other words, the Earth is slightly flattened.

What is Earth diameter and circumference?

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.

What is Earth’s diameter NASA?

Earth is the fifth-largest planet in the solar system. Its diameter is about 8,000 miles.

What is the size of Earth answer?

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). However, from pole to pole — the meridional circumference — Earth is only 24,860 miles (40,008 km) around.

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’.

How heavy is Earth?

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.

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.

How thick is planet Earth?

It’s also highly variable in its thickness. Under the oceans (and Hawaiian Islands), it may be as little as 5 kilometers (3.1 miles) thick. Beneath the continents, the crust may be 30 to 70 kilometers (18.6 to 43.5 miles) thick.

Which country is heart of Earth?

Antarctica is the sixth continent, but it’s a continent that you can define as the heart of Earth. The world’s main marine current is the circumpolar Antarctic current that moves from west to east around Antarctica.

Who made Earth?

The Earth formed over 4.6 billion years ago out of a mixture of dust and gas around the young sun. It grew larger thanks to countless collisions between dust particles, asteroids, and other growing planets, including one last giant impact that threw enough rock, gas, and dust into space to form the moon.

What is the shape of Earth called?

Earth is an oblate spheroid.

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.

What temperature is Earth?

The mean temperatures of planets in our solar system are: Mercury – 333°F (167°C) Venus – 867°F (464°C) Earth – 59°F (15°C)

Who find the size of the Earth?

The accepted measurement of the Earth’s circumference today is about 24,855 miles. Given the simple tools and technology that Eratosthenes had at his disposal over 2,000 years ago, his calculations were quite remarkable. Eratosthenes’ calculations were based on two assumptions.

Who calculated Earth’s true size?

The Greek philosopher Aristotle (384-322 B.C.) is credited as the first person to try and calculate the size of the Earth by determining its circumference (the length around the equator) He estimated this distance to be 400,000 stades (a stadia is a Greek measurement equaling about 600 feet).

What has 1/4 the diameter of Earth?

Earth’s moon is 2,159 miles (3,474 km) wide, about one fourth of Earth’s diameter.

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.

What is the actual orbital radius of Earth?

The radius of the earth’s orbit around the sun (assumed to be circular) is 1.50×108 1.50 × 10 8 km, and the earth travels around this orbit in 365 days.