Why is it that no matter whether it is a star, a planet, a comet or a gas star, it is all round

Why are celestial bodies all spherical?

Celestial bodies are not all standard spherical, they just look spherical, or almost spherical.

The earth is a slightly flattened spherical shape with slightly flattened poles; Jupiter and Saturn appear flatter at their poles due to their extremely dense atmospheres.

The reason why stars, planets, and other celestial bodies are spherical rather than square or other strange shapes is the result of gravity. Any object will have an attraction towards other objects. According to Newton's laws, the magnitude of gravitational force is inversely proportional to the square of the distance between two objects, regardless of their position in relation to each other.

As a result, a finite number of identical particles that are not evenly distributed tend to clump together to form spherical clusters. In the process of planet and star formation, there are many other forces acting at the same time.

If there is a period of time after the universe is large, a large number of different particles are unevenly distributed in the universe, thus forming a large unevenly distributed cloud of matter, in this cloud of matter, the particles attract each other, but the overall gravitational force does not reach equilibrium, there is still some kind of disturbance force to make it rotate. In particular, it is possible to get a companion star, so that there is a gravitational interaction between the two celestial bodies. Of course, there are also complex issues involved in electromagnetics, friction and heat.

At this time, the scattered clouds of matter gradually converge under the action of gravity, and at the same time begin to rotate due to their own heterogeneity and the action of certain external forces, so that a roughly (not perfectly spherical) rotating celestial body is formed. Its shape will depend on the magnitude of its rotation speed, and the faster it rotates, the closer its shape will be to an oblate circle. In addition, the shape of this celestial body is also related to the density of its constituent matter.

If you suppose you have a billiard ball in the shape of a standard sphere, it will keep its shape almost spherical during rotation; However, if it is a rotating water-filled balloon, it will be flat at both ends and protruding in the middle. In fact, most celestial bodies have a large mass and high rotation speed, and it is likely that the material near the equator will be thrown away from the celestial body, giving it a "** motion". The "fat" that has been thrown off may spread out in all directions, and in some cases may form a spherical satellite through a similar process.

Because these planets are attracted by some external force in the universe in the process of formation, they are hungry and have to run along a certain track and bend, so that the planets can run better and not be seriously impacted by external forces, so they are not circular. Filial piety returns.

Because it is related to the mass and weight of the self-provided leaky sphere, it is squeezed by gravity, the size of the sphere will change constantly, and the mass of comets and small rows of rolling stars is relatively small, so it cannot form a sphere.

Because the shape of celestial bodies depends on their own forces, comets and asteroids are smaller and less gravitational, so they are not round.

The main reason is that comets and asteroids are relatively small in mass and volume, and they cannot form spheres at all.

Introduction: In fact, there are many phenomena in nature that seem to be accidental, but in fact they are inevitable. For example, why do planets and stars in the universe appear as spheres?

Could it be that someone has prescribed it? In fact, these can also be solved by knowledge of physics.

It is important to know that the planets in each universe are made up of inner cores and outer layers, just like the earth has lava inside. External humans and objects can easily attach to the earth's surface due to gravity. Through the formula of gravitation, we can know that the magnitude of gravity is related to the mass of two objects and the distance they belong to, imagine that if the earth is not a sphere, but a cube, then the gravitational force at each point will have a strong difference, andThe difference in gravitational forces leads to a difference in the forces, and these forces interact with each other to make the cube unstable and eventually move towards a stable state similar to that of a sphere.

In addition, the planets in the universe have both rotation and revolution, so the earth is also subject to the action of the sun's gravity and the action of other spherical planets, resulting in the earth becoming an ellipsoid similar to a sphere. So for the planets in the universe,Only the formation of spheres is a stable stateOnce it falls into a period of decay or an explosion of activity, its shape will change and become unstable.

Although astronomy is an ancient discipline, the development of astronomy is inseparable from the development of new materials in physics, mathematics, chemistry and science. It is because of the interaction of various disciplines that human beings can have such a clear understanding of the cosmic environment in which they live. And launch a variety of satellites and manned spacecraft, so the development of one discipline will inevitably lead to the development of other disciplines.

Nothing in nature is intentional and makes sense. And it is because these invisible hands allow the exchange of various energy and matter in nature to form a stable state and form a stable form, so nature is worthy of human learning.

This was formed due to the development of astronomy. It also comes naturally. So the stars and planets in the universe are round.

It is formed by the gravitational pull between celestial bodies. Under the action of the gravitational field, all objects that are close to it are pulled inward.

This is because these stars have their own gravitational pull and also need a certain amount of autobiography, so they are all round in shape.

Fixed star. Stars are the most important celestial bodies in the universe and are the basis for the origin and evolution of other astronomical objects. They are formed by gravitational contraction and nuclear fusion reactions, fusing hydrogen into helium and releasing enormous amounts of energy.

According to the different masses, they can be divided into main sequence stars, red giant stars, supergiant stars, etc.

The color ranges from red to blue, corresponding to the surface temperature from low to high.

The letters O, B, A, F, G, K, M indicate the type of spectrum.

Supergiants can be millions of times brighter than the Sun.

At the end of their evolution, they may become white dwarfs, neutron stars, or black holes.

Nebula. Nebulae are the main gaseous astronomical structures that contain gases such as hydrogen, helium, and dust.

**Formation of residual gas in the star or death of the ejection of gas.

Reflects the different stages of formation and death of stars.

Takes on irregular, spiral, and other shapes.

Various spectra are emitted through stellar radiation.

Planet. Planets are large, solid bodies that orbit the stars.

It is divided into rocky terrestrial planets and gaseous Jupiteres.

The eight planets of the solar system are arranged by distance.

There is an incredible diversity of exoplanets.

The formation is associated with the star to which it belongs and the original disk.

Meteoroid. Meteoroids are small rock particles.

** Asteroids or comets.

Meteors are formed into the atmosphere.

According to **, it is divided into two categories: stony and ice.

Comet. Comets contain a lot of ice, dust, and rocks.

The running track is generally highly elliptical.

According to the orbital period, it is divided into long and short period comets.

When entering the inner solar system is heated, the surface material vaporizes.

Studying comets can explore the origins of the solar system.

Short-period comets mainly come from the Kuiper Belt.

1. The definitions are different.

Star: A star is a spherical luminous plasma held together by gravity.

Comet: A comet is a unique cloud-like appearance of a celestial body that moves around the sun when it enters the solar system, where its brightness and shape change with the solar distance.

Planets: must be celestial bodies orbiting stars; The mass must be large enough to overcome the gravitational pull of the solid to achieve a hydrostatically equilibrium shape (close to a sphere); The area around the orbit must be cleared, and there can be no larger objects within the orbit.

2. The movement trajectory is different.

Stars: The rotation of a star can be measured roughly through a beamsplitter, or by tracking the exact measurement of a star spot.

Comet: There are three types of comets: elliptical, parabolic, and hyperbola.

Planets: Celestial bodies that orbit stars.

3. Make a difference.

Stellar: At a certain point in the development of the universe, the universe is filled with uniform clouds of neutral atomic gas, and the large gas clouds are unstable due to their own gravitational attraction and collapse. In this way, the star enters the formation phase.

At the beginning of the collapse, the pressure inside the gas cloud is very small, and the matter accelerates to the center under the action of gravity.

On the one hand, the density of the gas has increased dramatically, on the other hand, due to the conversion of the lost gravitational potential energy part into heat energy, the temperature of the gas has also increased greatly, and the pressure of the gas is proportional to the product of its density and temperature, so in the process of collapse, the pressure grows faster, so that a pressure field sufficient to compete with the gravitational force is quickly formed inside the gas, and the pressure field finally stops the gravitational collapse. As a result, a new mechanical equilibrium shape is established, which is called the star billet.

Comet: The origin of the comet is an unsolved mystery. It has been proposed that there is a very large comet region in the outer solar system, where there are about 100 billion comets called Oort clouds, due to the gravitational pull of other stars, some comets enter the inner solar system, and due to the influence of Jupiter, some comets escape from the solar system, and others are "captured" as short-period comets;

It is also believed that comets formed near Jupiter or other planets; It is also believed that comets formed in remote regions of the solar system; Some even believe that comets are visitors from outside the solar system.

Planets: On the edge of a star, it may absorb a lot of cosmic dust, take the sun as an example: the sun absorbed a lot of dust about 4 billion years ago, and the dust collided with each other and stuck together.

For a long time, a large number of planetary embryos called stars appeared, and at that time there were at least billions of stars moving around the sun.

The law of action between the stars is: if the size of the two stars is very different, and the speed of each other is not large, after the collision, the small star will be attracted by the big star and eaten. In this way, the big stars are getting bigger and bigger.

If two stars are about the same size and have a lot of velocity with each other, they will break apart after they collide, forming many small pieces, which will then be eaten by the big stars one after another.

In this way, there are fewer and fewer stars. The big planets were the relatively large stars at that time, and the countless asteroids were the lucky ones who were not eaten during the annexation period.

Neutron stars, pulsars, red dwarfs, moons, comets, there are a lot of strange celestial bodies in the universe, in addition to stars and planets, there are also these stars.

There are a lot of celestial bodies in the Milky Way, and in addition to these, there are moons, dwarf planets, comets, moons that usually guard another planet and orbit around it.

There are also comets, white dwarfs, neutron stars, black holes, nebulae, moons, quasars, and many more. Some of these celestial bodies are special stars with different appearances.

What are the differences between stars, planets, and moons?

With the intrinsic zone bai different Stars by red-hot gas du

A spherical or globheroid-like celestial body that emits its own lightPlanetary Definition Edition: 1. Must orbit a star.

Celestial bodies; 2. The mass must be large enough, and its own attraction must be balanced with the rotation speed to make it spherical; 3. There can be no celestial body larger than it within the orbital range. In general, the diameter of the planet must be more than 800 kilometers and the mass must be more than 5 billion tons. Comets are generally very small in mass, with a very high orbital centricity, and a comet tail is produced when it is close to the center of perseverance.

Remember to adopt it.

Stars: react violently on their own, emitting light and heat, such as the sun. Planet.

Periodic rotation around a star due to the gravitational pull of a star, such as the Earth, as shown in high school physics. Satellites: Affected by the gravitational pull of stars and planets, the planets are larger, and rotate periodically around the planets.

Like the moon.

The star - the mass copy is relatively large, attacking the gaseous state, and is bai

Nuclear fusion will later become a red giant or a white dwarf DAO planet - less massive, whether it is a solid planet like the earth or a wood-like gas planet, it does not have significant nuclear fusion conditions (although Jupiter does have radiation inside, but it is not significant) Comet - irregular small stars made of rock and ice that swim around the edge of the star.

Stars, others revolve around him, planets, he revolves around others. Comet, spinning on its own.

Stars are constantly undergoing thermonuclear reactions and emitting heat Planets mainly revolve around the stars and cannot emit light on their own Satellites are stars that revolve around the planets and cannot emit light Meteors are aimlessly flying stars in the universe that crash into planets after being attracted to planets Comets are mainly stars with a diameter of tens to thousands of kilometers composed of ice and cosmic dust, which are held by the stars and pull out a tail composed of ice cubes at the same time.

Stars can shine and heat, and there are many planets that revolve around them, planets: they can't emit light, they have to revolve around stars, comets: with long tails