What planet is Earth? How many kilometers is the Earth's circumference?

The Earth is the only celestial body in the universe that has known life. It is home to millions of species, including humans. The Earth rotates from west to east and revolves around the sun. What kind of planet is the Earth? Please see the detailed sharing and introduction below!

Contents of this article

1. What kind of planet is the Earth?

2. How many kilometers does it take for the earth to circumnavigate?

3. How long does it take for the Tianhe space station to orbit the Earth?

What is the Earth?

The Earth is a planet. The Earth is one of the eight planets in the solar system. It is the third planet from the Sun in order from closest to farthest. It is also the terrestrial planet with the largest diameter, mass and density in the solar system. It is 150 million kilometers away from the Sun.

The earth rotates from west to east while revolving around the sun.

The interior of the earth is divided into the core, mantle, and crust structure, and the surface is divided into the hydrosphere, atmosphere, and magnetic field.

The Earth has a natural satellite, the Moon, and the two form a celestial system - the Earth-Moon system.

How many kilometers is one lap of the earth?

The circumference of the Earth is about 40,000 kilometers. The radius of the Earth's equator is slightly longer, and the radius of the poles is slightly shorter. The polar axis is equivalent to the rotation axis of the oblate spheroid. The Earth's equatorial radius is 6378.137 kilometers, the polar radius is 6356.752 kilometers, the average radius is about 6371 kilometers, and the equatorial circumference is about 40,075 kilometers.

The interior of the earth is divided into the core, mantle, and crust structure, and the surface is divided into the hydrosphere, atmosphere, and magnetic field.

The Earth is the only celestial body in the universe with known life and is home to millions of species, including humans.

The Earth's surface area is 510 million square kilometers, of which 71% is ocean and 29% is land.

How long does it take for the Tianhe space station to orbit the Earth?

It takes about 90 minutes for the Tianhe space station to orbit the Earth. The space station revolves around the Earth with an apogee altitude of about 394.9 kilometers, a perigee altitude of about 384 kilometers, an inclination of 41.581°, an altitude of about 389.47 kilometers, and a speed of about 7.68 kilometers per second.

At 11:23 on April 29, 2021, the Long March 5B Yao-2 carrier rocket carrying the Tianhe space station was launched into space.

At 15:54 on June 17, 2021, the Shenzhou XII manned spacecraft successfully rendezvoused and docked with the Tianhe core module.

At 14:57 on July 4, 2021, the Shenzhou XII astronauts successfully completed all the assigned tasks during the extravehicular activity, and the first extravehicular activity of Chinese astronauts was a complete success.