Can only those that move around the sun be called planets?

Planets do not necessarily revolve around the sun, but they can also revolve around other stars. Revolving around the Sun is also not necessarily a planet, it could be a comet, meteor, or asteroid.

Definition of planets.

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

2. The mass must be large enough, and its own attraction must be balanced with the rotation speed to make it spherical;

3. It is not affected by other objects around the orbit, and can clear other objects near its orbit.

Not necessarily. If it orbits around other stars, it cannot shine and heat itself, and it is also a planet. Now more than 300 planets have been discovered outside the solar system.

No. Planets are stars that orbit stars and cannot shine on their own. More than 300 planets have now been discovered outside our solar system.

The term "planet" originated from the Greek word for "wanderer" in the solar system. For nearly a thousand years, Mercury, Venus, Earth, Mars, Jupiter, and Saturn have been considered the standard planets in the solar system. After the 19th century, astronomers discovered Uranus, Neptune and Pluto one after another, making the "planets" of the solar system nine in number.

Since then, the "Nine Planets" have become a household name.

A "planet" is a celestial body that orbits the Sun and has a gravitational force sufficient to overcome its rigid force to make the body spherical and capable of clearing other objects in the vicinity of its orbit. Of the "nine planets" of the solar system's tradition, only Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune meet these requirements. Pluto was automatically downgraded to a "dwarf planet" because its orbit intersected Neptune's orbit and did not meet the new definition of a planet.

No, the sun is just a star in the Milky Way, and there are galaxies out there, and there are planets that orbit the stars, and there are a lot of them in the universe.

Take a look at the simplified model of the eight planets, which do orbit the Sun in the same plane. Planets close to the outer solar system are also affected by the Kuiper belt and the gravitational pull of the planets, hence the orbit and ecliptic plane of the Sun.

Present a certain angle. Pluto.

Once thought to be the ninth largest planet in the solar system, its orbit is located on the periphery of the solar system, is small in size and mass, and is heavily influenced by other celestial bodies. Its orbit has a large angle to the ecliptic plane of the Sun. Finally, Pluto was relegated to a dwarf planet.

Thanks for having me! Eight planets in the solar system.

The orbit is not coplanar, the Earth and the Sun are the same plane. Mercury.

Venus and Mars have the greatest angles to this plane. Other planets have many moons, and they have a very high mass density, so the angle of the plane around the Sun is different from that of Earth. The orbits of the major bodies of the solar system are located near the plane of the Earth's orbit around the Sun, i.e., the ecliptic plane.

They are all very close to the ecliptic. Comets like Pluto and Kuiper Belt objects.

Tends to have a more pronounced inclination. A bird's-eye view of the solar system from the northern part of the Earth reveals not only these large objects on the ecliptic, but all the planets and most of the celestial bodies orbit the Sun in 3 counterclockwise directions. This is a very interesting phenomenon.

The most widely accepted theory for this strange phenomenon is the nebula hypothesis.

It can be traced back to the origins of the solar system. This hypothesis was first established by Immanuel Kant in 1755.

and Lars. They believe that the solar system was formed about 4.6 billion years ago by the collapse of a huge molecular cloud. This massive molecular cloud is likely an early supernova explosion.

residues. The strong gravitational pull of the nebula slowly rotates around it, forming a circular accretion disk with a denser central region from which stars are born.

This planet is the Sun. The material left behind by the sun gradually formed the celestial bodies of the solar system, such as planets. What we need to discuss here is the concept of orbital inclination, that is, the orbital plane of the earth revolving around the sun is regarded as the ecliptic plane, and the angle between the orbital plane of other planets and the ecliptic plane is called the orbital inclination of the planet.

All the major planets in our solar system orbit at an inclination of 10 degrees, so from God's point of view, they are basically flat n n

The planets in the solar system basically orbit the star of the sun, maintaining a certain parallel distance between them and orbiting in their respective orbits.

The moon moves in a relative elliptical motion around the earth, the earth makes a series of elliptical movements around the sun, and the sun makes the Milky Way make a series of rotations.

All the planets revolve around the Sun and their orbits are elliptical, with eight planets moving in one plane.

If you look closely at the model of the solar system, you may notice that the solar planets, moons and asteroids are all in the same plane, which is why the predecessor of the solar system was an irregular nebula that spread through space, and most of the matter came from the early universe, in the solar nebula, the particles were doing irregular thermal motion, and they would collide with each other, so the whole nebula would have some extra angular momentum in one direction.

This direction becomes the direction of the nebula's overall rotation, as the gravitational collapse of the nebula gradually falls to the center, because the angular momentum conservation nebula will rotate faster and faster, far from the nebula's equatorial plane, the matter does not have enough speed to get rid of gravity, so they will gradually be attracted by the gravitational center. The nebula rotates faster near the equatorial plane, so the matter can resist gravity and rotate around the center of gravity, and eventually the center of the nebula forms the sun, and as the sun grows, the gas cloud also continues to collapse, forming a flattened and larger disk around the star, and finally this cloud forms a flat structure around the star called a circular astrolabe.

This circular astrolabe, which is thousands of astronomical units in diameter but only one-tenth of its diameter, occasionally collides with each other for tens of millions of years, and even joins together, gradually turning into large particles of several millimeters and then into small pebbles several centimeters long. These pebbles continued to collide and merge, eventually becoming huge celestial bodies.

After these celestial bodies are large to a certain extent, they are gradually shaped into spherical planetary dwarf planet moons under the action of gravity, and the shape of other celestial bodies is not very regular, such as asteroid comets and some small moons, etc., although these celestial bodies are of different sizes, but they are basically located in the same plane, because the raw materials that compose them all come from the same plane, so the eight planets of the solar system and other celestial bodies revolve around the sun in the same plane.

This is because the planets in the Sun ** each gain unequal centrifugal force when they fly away from the Sun when they are centrifugal inside.

When the force gradually decreases and is equal to the gravitational pull of the sun, it stops flying away from the sun and begins to revolve around the sun under the drag of the sun's gravitational pull.

Because the Sun rotates from west to east, the planets also revolve from west to east under the gravitational pull of the Sun. Therefore, the force that causes the planet to rotate is the gravitational pull of the sun, and this force is continuous.