Is Earth a planet? What is the closest planet to Earth?

The Earth is a planet and ranks third in order of proximity to proximity to the Sun.

Earth is one of the eight planets in the solar system, the third in order of near and far from the sun, and it is also the terrestrial planet with the largest diameter, mass and density in the solar system, 100 million kilometers away from the sun. The Earth rotates from west to east while revolving around the Sun.

The radius of the Earth's equator is kilometers, the polar radius is kilometers, the average radius is about 6371 kilometers, and the circumference is about 40076 kilometers. The surface area of the earth is 100 million square kilometers, of which 71% is oceans and 29% is land.

There are eight planets in the solar system, and they are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune in descending order from near to far.

According to the ranking of distance from the sun, the earth is in 3rd place.

According to the ranking of size, the earth is ranked 5th. The largest planet in the solar system is Jupiter, and the smallest is Mercury.

Of course the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.

Ranked third

Only Jupiter, Saturn, and the Sun are bigger than the Earth.

The closest planet to Earth is Venus.

Due to the autobiography and revolution of the planets, the distance between the Earth and other planets varies, and the closest planet to Earth is Venus. The distance between Venus and Earth varies between 100 million kilometers and 100 million kilometers, so for most of the time, Venus is the closest planet to Earth in the solar system.

Be. Earth is the third planet of the solar system and the largest terrestrial planet in the solar system.

The earth is one of the eight planets in the solar system, and it is the third planet in order from near to far from the sun, and it is also the terrestrial planet with the largest diameter, mass and density in the solar system, 100 million kilometers away from the sun. The Earth rotates from west to east while revolving around the Sun. Now 4.046 billion years old, it has a natural satellite, the Moon, and the two form a celestial system, the Earth-Moon System.

It originated from the primordial solar nebula 4.6 billion years ago.

The Earth's equatorial radius is kilometers, the polar radius is kilometers, the average radius is about 6371 kilometers, and the equatorial circumference is about 40076 kilometers. The Earth's surface area is 100 million square kilometers, of which 71% is oceans and 29% is land.

The Earth is a planet, one of the eight planets in the solar system, the third planet in order from near to far from the sun, and it is also the terrestrial planet with the largest diameter, mass and density in the solar system, 100 million kilometers away from the sun. The Earth rotates from west to east while revolving around the Sun. Extended Information What is a planet.

A planet usually refers to a celestial body that does not emit light on its own and orbits a star. Its rotation is often in the same direction as the rotation of the star it orbits. Generally speaking, planets need to have a certain mass, and the mass of the planet must be large enough to be nearly spherical, and it cannot undergo nuclear fusion reactions like stars.

On 24 August 2006, the General Assembly of the International Astronomical Union adopted a new definition of "planet", which includes the following three points:

1. It must be a celestial body orbiting a star;

2. The mass must be large enough to overcome the gravitational pull of the solid to achieve the shape of hydrostatic equilibrium (close to that of a sphere);

3. The area near the orbit must be cleared, and there can be no larger celestial bodies than it within the orbital range.

Eight planets. 1. Mercury.

Mercury is closest to the Sun and is the smallest planet in the solar system in terms of volume and mass. Often at the same time as the sun, it was called "Chenxing" in ancient China. Mercury is smaller in diameter than Ganymede and Titan.

2. Venus. The sixth largest planet in the solar system, known in ancient China as Taibai or Taibaixing. It is sometimes the morning star, and dawn appears in the eastern sky and is called "enlightenment"; Sometimes it is a twilight star again, and after dusk it appears in the western sky, which is called "Chang Gung".

Venus is the brightest star in the whole day except for the Sun and the Moon.

3. Earth. Earth is the third planet from the Sun and the fifth largest planet in the solar system. It has a natural satellite, the Moon, and the two form a celestial system, the Earth-Moon System.

4. Mars. Mars is the fourth closest planet to the Sun and the seventh largest planet in the Taiqi Zenyang system. In ancient China, it was called "Luminous Star", and the phenomenon of Mars "staying" in the heart is called Luminous Confusion and Guarding the Heart.

5. Jupiter. Jupiter is the fifth planet from the Sun and the most massive of the planets in the Solar System, with a mass twice that of all seven other planets combined, 318 times that of Earth, and a volume of Earth. 1316 times. Known as the "King of the Planets".

6. Saturn. Saturn, the sixth-farthest planet from the Sun and the second largest of the eight planets, is known as "Zhenxing" in ancient China, and is the least dense planet in the solar system and can float on water.

7. Uranus.

Uranus is the seventh farthest planet from the Sun in the Solar System and the third largest planet in the Solar System in terms of diameter. Uranus is larger in size than Neptune and smaller in mass.

8. Neptune.

Neptune is the eighth planet orbiting the Sun and the fourth largest body in the Solar System (in diameter). Neptune is smaller in diameter than Uranus and acts as a porto, but has a greater mass than it.

The Earth is a planet.

Planets generally refer to celestial bodies that do not emit light by themselves, and are based on and orbit the stars, and the direction of rotation is generally consistent with the rotation direction of the stars around them. With the discovery of a number of objects the size of Pluto, the scientific definition of the word "planet" seems more poignant.

Historically, planets got their names from the fact that their positions were not fixed in the sky, as if they were walking in the stars. The five planets visible to the naked eye in the solar system, Mercury, Venus, Mars, Jupiter and Saturn, have been discovered by humans since prehistory. In the 16th century, heliocentrism replaced geocentrism, and mankind understood that the Earth itself was also a planet.

The nature of the Earth

1. Internal structure: The internal structure of the earth can be divided into three layers: the crust, the mantle and the core. Under the action of the earth's gravity, a large amount of gas gathers around the earth to form an envelope, which is the earth's atmosphere.

2. Movement cycle: The earth is like a spinning top, constantly rotating from west to east along the axis of rotation. Her rotation period is 23 hours, 56 minutes and 4 seconds, which is about 24 hours.

At the same time, the Earth also revolves around the Sun, and her orbit is elliptical, with a half-major diameter of 149,597,870 kilometers. It takes days to rotate a week, which is a year.

1. The Earth is one of the eight planets in the solar system, and it is the third planet in order of being from the sun. It has a natural satellite, the Moon, and the two form a celestial system, the Earth-Moon System. Earth, as a planet, originated from the primordial solar nebula 4.6 billion years ago.

The Earth interacts with other celestial bodies in outer space, including the Sun and the Moon.

2. The earth is home to millions of creatures, including human beings, and the earth is the only celestial body in the universe where life is known. The radius of the Earth's equator is kilometers, the polar radius is kilometers, the average radius is about 6,371 kilometers, the circumference of the equator is about 40,076 kilometers, 71% of the earth is ocean, 29% is land, so the earth is blue in space.