What is the planet of the earth, and what is the star of the earth?

Planets of the solar system.

Orbital data. The aphelion is 152,097,701 km (710 333 5 au).

The perihelion is 147,098,074 km (289 891 2 au).

Orbital semi-major axis 149,597, km (000 112 4 au)Orbital semi-minor axis 149,576, km (860 486 9 au) Orbital circumference 924,375,700 km (069 900 7 au) Orbital eccentricity 710 219

Average rpm velocity km s (107,218 km h), maximum rpm speed km s (109,033 km h), minimum rpm speed km s (105,448 km h), orbital inclination 0 (to the solar equator).

The ascending node is right ascension 36°

The perihelion spoke angle of 83°

Satellites 1 (Moon).

Physical characteristics. Ellipse 352 9

The average radius is 6, km

The radius of the equator is 6, km

The radius of the poles is 6, km

Aspect ratio 647 1

The circumference of the equator is 40, km

The circumference of the meridian circle is 40, km

The average circumference is 40, km

Surface area 510,065,600 km2

Land area 148,939,100 km 2 ( % water area 361,126,400 km 2 ( % volume 207 3 10 12 km 3

Mass kg average density 5, kg m 3

The gravitational acceleration of the equatorial surface is 1 m s 2 ( 32 g ) the cosmic velocity km s (39,600 km h) and the sidereal day is 258 d ( h ).

Equatorial rotation rate m s

The axis is tilted 281°

Arctic right ascension undefined.

Declination +90°

The albedo mean surface temperature is 287 K(14).

The maximum surface temperature is 331 k(

The minimum surface temperature is 184 k(

Atmosphere. Surface pressure kpa (sea level) nitrogen oxide.

Argon carbon dioxide.

Everybody says it's planets, and I say it's planets. Hehe.

One of the eight planets of the solar system.

The earth is also called a planet.

Earth is one of the eight planets in the solar system.

It is the third planet in descending order from closest to the sun, and it is also the terrestrial planet with the largest diameter, mass and density in the solar system.

100 million kilometers from the sun.

The Earth rotates from west to east while revolving around the Sun. It's 4,04.6 billion years old, and it has a natural satellite -- the Moon.

The two form a celestial system.

Earth-Moon system. It originated from the primordial solar nebula 4.6 billion years ago.

Why is it called the earth and not the stars?

Because in ancient times, the sky was round.

People have always believed that the sky is like a round lid, the land is like a chessboard, and the world we live in is like a pan under a round lid, where the sun, moon and stars all rise in the east and set in the west. Until later, astronomical telescopes.

After the emergence of the universe, people discovered that there are eight planets in the solar system when observing the universe.

However, why is the earth called "star" except for the earth, the origin of the earth's name can be traced back to hundreds of years ago, when people always thought that the earth was flat, but later, there was a saying that the sky is round and the place is round.

After a constant break, plus Magellan.

At the end of the circumnavigation of the world, people gradually realized that the earth was a sphere, so they called it the earth, which was simple and easy to understand.

The Earth is also called the Blue Star, the third planet.

Blue Star: The approximate part of the Earth's surface is a land mass made up of continents and islands. The rest is covered by water, mostly by oceans, bays, and other bodies of saltwater, but also by lakes, rivers, and other bodies of fresh water, and the water is mostly blue, so the Earth is blue when seen from space, hence it is called the Blue Planet.

Third planet: Earth is the third planet from the Sun and the only celestial body known to humans to nurture and support life.

The formation of the Earth.

The solar system was formed about 6.5 billion years ago, while the native Earth was formed about 6.5 billion years ago. Theoretically, the formation of the Sun began with the gravitational collapse of a cloud of large hydrogen molecules hundreds of millions of years ago, and most of the collapsed masses were concentrated in the center, forming the Sun. The rest of the space rotates and flattens out to form a protoplanetary disk, which in turn forms planets, moons, asteroids, comets, meteoroids, and other small solar system bodies.

The nebula hypothesis asserts that the microplanets that form the Earth originate from the massaching masses of gas, ice particles, and dust with a diameter of 1 to 10 kilometers that are left over from accretion and collapse. These materials grew over a period of 10 million to 20 million years to form the Proto-Annihilated Earth. The nascent Earth's surface is an "ocean" of magma.

The Earth is a planet.

The Earth belongs to the planets. A planet usually refers to a celestial body that does not emit light on its own and orbits a star. Earth is one of the eight planets, the third planet from the Sun and the fifth largest planet in the solar system.

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

Earth is the only celestial body known to nurture and support life. Approximately the surface of the earth is a land mass made up of continents and islands. The remainder is covered by water, mostly by oceans, bays, and other saltwater bodies, but also by lakes, rivers, and other freshwaters, which together make up the hydrosphere.

Most of the Earth's polar regions are covered in ice.

Location:

In the last century, this understanding of the Earth's place in the universe has expanded radically. At first, the Earth was thought to be the center of the universe, and at that time the knowledge of the universe consisted only of the planets visible to the naked eye and the seemingly fixed stars on the celestial sphere.

In the 17th century, heliocentrism was widely accepted, and later William Herschel and other astronomers observed that the Sun was located in a disk-shaped galaxy made of stars. By the 20th century, observations of spiral nebulae revealed that our Milky Way was just one of billions of galaxies in the expanding universe.

In the 21st century, the overall structure of the Earth universe in the observable universe is beginning to become clear – superclusters of galaxies form a huge network of large-scale fibers and holes. Superclusters, large-scale fibrous structures, and holes are probably the largest coherent structures that exist in the universe.

The Earth is a planet.

Earth is the third planet from the Sun and the only celestial body known to mankind to nurture and support life. The surface of the Ground Ball is roughly a land mass of continents and islands. The remainder is covered by water, mostly by oceans, bays and other saltwater bodies, but also by lakes, glaciers, rivers and other freshwater bodies, especially glaciers, which together form the hydrosphere.

Most of the Earth's polar regions are covered in ice.

The Earth's outer layer is divided into several rigid tectonic plates that migrate to the surface over millions of years while its interior remains active, with a solid iron core, a liquid outer core that generates the Earth's magnetic field, and a convective mantle that drives plate tectonics, among other things.

The internal structure of the Earth

The Earth's interior, like other terrestrial planets, can be divided into layers based on chemical or physical (rheology) properties. However, the Earth's inner core and outer core are distinctly buried, a feature that other terrestrial planets do not have.

The outer layer of the Earth is the crust of silicate minerals, and the mantle underneath is made up of a layer of viscous solids. The demarcation between the mantle and the crust is the Moho discontinuity.

The thickness of the Earth's crust varies depending on the location, ranging from 6 km on the seafloor to 30 to 50 km on land. The crust and the colder, harder upper layers of the mantle are collectively called the lithosphere, and plates are formed in this region. Below the lithosphere, the asthenosphere with low viscosity slides on the asthenosphere.

Major changes in the crystal structure of the Earth's mantle occur between 410 and 660 km below the surface, the transition zone separating the upper mantle from the lower mantle.

Below the mantle is the core-mantle boundary (Gutenberg discontinuity) that separates the mantle from the core, and below is the very low-viscosity liquid outer core, and the innermost is the solid inner core.

The above content reference: Encyclopedia - Earth.

The earth belongs to the planet, is the eight planets of the solar system, according to the order from the sun from near to far for the third, belongs to the terrestrial planet, the earth rotates from west to east, while revolving around the sun, in addition to the earth and the moon form a celestial system, called the earth-moon system. The earth belongs to the planet, is one of the eight planets of the Taistool wide posture Yang system, according to the order from near to far from the sun to the third, belongs to the terrestrial planet, the earth rotates from the west to the east, and revolves around the sun at the same time, in addition, the earth and the moon form a celestial system, called the earth-moon system.

The Earth is a planet. The Earth is 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. Late selling.

The Earth rotates from west to east while revolving around the Sun.

The interior of the earth is divided into the core, mantle, and crustal structure, and the outer branches of the earth have hydrosphere, atmosphere, and magnetic field.

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