-
Any star begins as a mass of interstellar dust that occupies a large area of space, and all of it revolves around the center of mass of this mass with extremely slow angular velocity. The rotation at this point is very slow. And as they slowly come together under the action of gravity (at first the dust mass is stable, the gravitational force just provides the centripetal force for the dust to move elliptically.
If the steady state can be broken if other interstellar matter suddenly disturbs the dust outside this dust, then the stable state can be broken, i.e., the dust begins to gather to form a star), then according to the conservation of angular momentum (any rotating body has angular momentum, the magnitude of which is mr 2w), the angular momentum at the beginning of the convergence should be the same as the angular momentum at the time of the formation of the star (just like momentum, the momentum of the system is conserved without external forces, and the same applies to angular momentum), then in the dust state, the radius r of the system is very large, and when the convergence is r becomes smaller, to keep the angular momentum constant, then only the angular velocity w can increase. Therefore, the rotation of the star originates from the angular momentum at the beginning of its formation, and such rotation does not require energy.
-
It is the result of the combined action of two forces (which can also be said to be the velocity in two different directions).
One of these two forces is the gravitational force and the other is the centrifugal force, this gravitational force ** is the mass of the object, which will cause the object to produce centripetal velocity towards a certain center; This centrifugal force is the inertia of the object's own velocity, which is reflected in the centrifugal velocity of the object towards a certain center.
Since this gravitational pull causes the object to constantly change the direction of motion, the planets in the universe will turn around.
-
As long as the planet starts to rotate, it will no longer consume energy, inertia! There is no resistance in the universe, as long as there is no external force to stop the planet from going on!
Let's talk a little bit more about how rotation begins. And where did the initial force come from? Newton once said that "God's first blow", but modern people have known that it was actually the original great ** of the universe, which created the universe and gave the stars the initial rotational force, and the stars began to orbit each other in a staggered orbit because ......of each other's attraction
-
On the other hand, there is a gravitational force between the stars, and if they do not rotate, there is no centripetal force, and they will be gravitationally attracted together.
-
It should be an internal force, look at the destruction of the center of the earth like this, almost.
-
Dark matter! It's the ** of all forces.
-
There is no force required to turn around, and there is no change in energy.
It's just that if you change the state of turning around, such as speed and direction, you need force.
-
Why do all the planets rotate in the universe? How much does their rotation work?
Why do all the planets rotate in the universe? How much does their rotation work? <>
There is no absolutely stationary star, and there is no non-rotating star, and when the star is generated, it is a process of chemical material convergence, and this whole process requires chemical substances to continue to accumulate and surround, and the driving force of rotation comes from this. The rotation of a star and its own rotation are not the same definitions, but they all have one thing in common, that is, there must be a strong attraction to push it.
It is very likely that the rotation here involves the primordial moment of momentum, which was the protoastrolabe at the time of the creation of large planets or even subordinate celestial systems.
Analysis or vapor dust collapse produces the angular momentum remaining after the first planets and large planets.
Brings the raw momentum moment. According to the law of conservation of angular momentum and momentum.
Angular velocity exists without any external force.
The phenomenon of conservation law, because the chemical substance collapses and causes the half-warp to shrink, and the angular velocity of the rotation of the star when it is created will also increase. After the angular momentum of the original state intervenes, the rotation of the star will be formed, and whether it is a large planet or a planet that is formed later, the rotation must exist.
There are no independent celestial systems in the universe, and there are no stars that are not affected by the attraction of other stars, so even if it is essentially permissible for a non-rotating star to occur, it is simply not possible, because no one star is independent. It will not be affected by the gravitational field of all the surrounding stars, and such large planets and planets do not exist at all.
Stars will continue to be affected by the attraction of planets, communication satellites, and large planets with distant orbits, and even collide, and it is not impossible for the rotation speed to gradually lose time, but it will tend to a relatively stable state in the future. As a result, most of the big planets we see are rotated, and some are tidally locked.
In the future, rotation and rotation go hand in hand, you can't see it. Electromagnetic fields and atmospheric circulation.
To a certain extent, it will also promote the acceleration or reduction of rotation, and the original angular momentum is the source of rotation.
-
There is no absolutely stationary celestial body, and there is no celestial body that does not rotate, and the formation of celestial bodies requires the process of material aggregation, which requires the continuous gathering and surrounding of matter, so the driving force of rotation comes from this.
Rotation here may involve initial momentum, which is provided by the remaining angular momentum after the original astrolabe or gas dust collapsed to form the first galaxies and planets at the beginning of the formation of the planet or even the celestial system to which it belongs. According to the law of conservation of angular momentum, when angular velocity is conserved in the absence of external forces, the angular velocity of the rotation at the beginning of the formation of the celestial body will increase due to the smaller radius caused by the collapse of the matter. After the angular momentum of the primitive state intervened, the rotation of the celestial body was formed, and whether it was a planet or an asteroid that was formed later, the rotation must exist.
-
Rotation is the original dynamic force that has a great influence on the absorption of interstellar matter during star formation. Power** is the angular momentum of rotation.
-
The initial dynamics of the rotation of galaxies and planets, at the time of their formation. After the first few minutes of the universe, both density and temperature gradually decrease. Although the universe is homogeneous on a large scale, there are still some regions of slightly denser areas where matter attracts nearby matter through gravity, thus making it denser and eventually causing the expansion of the region to stop and turn to collapse.
In the process of collapsing, they rotate slowly due to the gravitational pull of nearby matter.
-
You've noticed that celestial bodies have to be at least as big as planets to form a sphere, and asteroids and meteorites, etc., are oddly shaped. Why? Because of gravity.
The shape of the object is determined by the electromagnetic force, which maintains the crystal structure inside and competes with gravity. For massive objects, gravity begins to dominate so much that matter gathers towards the center. You have to be close to a spherical shape to have the same gravitational pull at every point on the surface, otherwise the force will be uneven, causing the star to deform.
Only celestial bodies that rotate at high speeds, due to centrifugal force, are spheroids with the axis of rotation as their axis, but in general, they are relatively "round".
Imagine an extremely large distribution of hydrogen atoms evenly distributed in an infinite number of spaces, and because no celestial bodies have been generated, they are not subject to any force. It's not the "ideal state" that our textbooks say, but it's not really affected by the gravitational pull of other celestial bodies, but it's not subject to the gravitational pull of "other" celestial bodies. But despite the fact that these hydrogen atoms are extremely tiny and their gravitational pull is very weak, there is always a gravitational pull between the hydrogen atoms, and if these gases are "absolutely uniform", there is nothing to say.
Obviously, nothing can be done "absolutely". As a result, there is a slight unevenness, resulting in the accumulation of small air masses, but the attracted hydrogen molecules are not necessarily moving towards the center of the air mass at a precise angle, as long as there is a deviation of the very microwave, it will cause rotation. Think about the whirlpool in the river and the sea, that's what it looks like.
Hundreds of millions of years, billions of years, small air masses rotate and gradually develop into atmospheric masses, creating huge pressures and producing stars and galaxies. <>
Of course, a special case is gravitational locking, where the Moon is gravitationally locked by the Earth, and the rotation period is exactly the same as the revolution period. Absolute motion, relative stillness, depending on your viewing angle. Rotation is just another form of motion, and the planets that produce rotation experience violent motion because the forces on the large celestial bodies are uneven, so they rotate.
Unless you revolve around the Earth (spinning at the same speed, it's called locking, just like the Moon, the other side of the Moon doesn't rotate because it revolves around the Earth at the same speed as the Earth), the rest of the planet looks like it's spinning.
According to Newton's first law, any object must remain in constant motion, in a straight line, or at rest until an external force forces it to change its motion. The energy generated by the big ** makes all matter move constantly, even if it eventually touches and merges, the end result is that it turns into a ball due to gravity and then continues to move. How do you think the ball moves?
There's no concept of up, down, left, or right, so it's just rotating. There is no air in the universe that creates friction, so it just rotates all the time. I hope it will be helpful to you by giving a detailed explanation of the problem.
-
Planets and galaxies are spinning, but what about the universe? Research reveals the mystery of the rotation of the universe!
We know that since the exploration of space by human beings, almost everywhere we have seen has one thing in common, that is, every planet and every galaxy is in motion, and this movement is rotation. Almost everything in the universe is spinning. Planets revolve on their axes, stars revolve around black holes, and galaxies revolve in huge spiral structures.
But what about the universe as a whole?
Yes, this seems to have become a law of the hidden search of the universe, but what about the universe? There is reason to believe that the universe is actually spinning, but it is too large for us to observe. Recently, a study revealed the mystery of the rotation of the universe!
Recently, scientists found in a study of 200,000 galaxies that the entire universe may have rotated in one direction at an early stage!
The rotation of the structure is because of the properties of angular momentum. Angular momentum is a measure of mass and rotation, and is a conserved physical property of hail carriers. One of its peculiarities is that when the masses are closer together, it rotates faster to keep the angular momentum constant.
Galaxies, stars, and planets are all formed from huge clouds of cosmic gas and dust. Because gravity causes these clouds to collapse, even the smallest bit of rotation is magnified, so it's only natural that they all rotate.
But on the scale of the universe, the situation is different. The universe is generally considered to be homogeneous and isotropic. This means that, on average, matter should be evenly distributed and the total angular momentum of the universe should be zero.
If this is true, then the rotation of the galaxy should be random. In any area of space you are observing, about half should rotate clockwise, and about half should rotate counterclockwise.
But there is evidence that the rotation of the Milky Way is uneven. In 2011, a study of 15,000 galaxies found a small deviation in rotation. The evidence is somewhat weak due to the relatively small sample size.
But a study presented this week at the 236th meeting of the American Astronomical Society shows a stronger difference.
However, the study has not been peer-reviewed, so we should be rational about the conclusions. The study looked at 200,000 galaxies and their measured rotations. As the sample size increased, it discovered not only rotational bias but also some cosmological properties.
On the one hand, this difference seems to be getting stronger as the redshift increases. On an ever-larger scale, this difference is hard to ignore.
This phenomenon suggests that the universe as a whole may well have an axis of rotation. Interestingly, the cosmic axis seems to echo the cold spots of the so-called cosmic microwave background. So far, however, the evidence we have is still limited, first of all, the data does not support a simple single-axis rotation, such as the rotation of a planet or a star.
In contrast, bias has a more complex multipolar structure. Despite this, it seems that something strange does happen in the universe. While it is true that the universe does appear to be approximately homogeneous and isotropic, studies like this suggest that it is not accurate, but there is no doubt that it has a huge impact on our cosmological model.
-
Be. Around us, from the microscopic to the macrocosm, we most easily feel that one object revolves around another. For example:
Electrons around nuclei, satellites around planets, planets around stars, and stars around the center of galaxies. So the question is, do galaxies revolve around something, or do they revolve around something? Now that we know that there may be a multiverse, is our universe revolving around something?
Let's talk about that today.
Let's start with the origin of the universe! The expansion of the universe has created the initial state of the great **, and the spin is an intrinsic property of the particle, and how did the initial angular momentum of the rotation of the galaxy come about? Is the universe also spinning?
Before our universe was filled with matter, radiation, neutrinos, dark matter, or any particles discovered so far, the universe was in the early stages of exponential expansion, at which point the only energy in space-time was the energy inherent in space itself. This was the period of expansion of the universe, which led to the Great ** and created the hot, dense state of matter and radiation in the early days of the Great **, which we call the birth of the universe.
As far as we know, during expansion, there are quantum fluctuations in vacuum energy, but they cannot interact with each other because space expands too fast to proceed at the speed of light. Whereas expansion is the same everywhere and in any direction, there is no specific preferred axis. When the expansion ends, the energy in space decays into matter, antimatter, and radiation, but a small part of the vacuum energy is "locked" in space, which is what we now call dark energy.
In an exponentially expanding universe, these quantum fluctuations create regions of super-density and low-density reeds.
This is what we call the big ** stage. The universe created all the particles in the Standard Model as well as the ones we haven't discovered yet. From the very beginning, all elementary particles have an intrinsic angular momentum:
A property called spin, which cannot be separated from the particle itself. The spin of each electron, quark, and neutrino is 1 2, and the spin of each gluon or photon is 1. Assuming that gravity is quantified in the way we think it is, the spin of the graviton is plus or minus 2, and of all elementary particles, only the Higgs boson has a spin of 0.
Current theories of physics cannot solve this problem, and there are only various hypotheses and conjectures put forward by relying on mathematical models, but all of them are unsatisfactory. I think that at present, human beings are quite far from solving the physics, dark matter, and dark energy of black holes, and it will take a long time to understand the source of matter and energy. But human beings will continue to explore, and we will continue to explore. >>>More
If the planets in the sky were close together and moving in a haphazard manner, perhaps they would collide with each other. >>>More
It is due to the sudden enlargement of the substance and then the sudden shrinkage.
More than 60 years ago, Albert Einstein proposed the theory of "wormholes". So, what is a "wormhole"? To put it simply, a "wormhole" is a thin tube of space-time that connects distant regions of the universe. >>>More
According to **, the Ice Clan in Cangyue's Mirror series is a group that has diverged from the Protoss. Their wise man is a woman named Icewind, who is the leader and prophet of the Ice Clan, and has a high status and power within the clan.