Are the stars we talking about moving?

I feel that all my students who have studied physics in junior high school understand a truth, that is, motion in our universe is absolute, while rest is relative. Famous physicist Isaac Newton.

After this law was proposed, it continues to this day, and no one can overturn it. From here we can see that whether it is a planetary comet.

Or stars or even black holes, in fact, they are all in motion. <>

It's just that our current level of technology limits our observation of them, so we think they are stationary to a certain extent. For example, in ancient times, we even thought that the sky was round and the earth was round.

The sun rises and sets around us every day, creating a day-night cycle. But in fact, the reason why the alternation of day and night can occur is because of the rotation of the earth, and the phenomenon of the four seasons is because the earth revolves around the sun. From here we can see that our earth is in constant motion, so will the sun move?

Detectors in the United States have observed that the Sun rotates at a rate of about 26 days. This speed is a bit slow compared to us, but we need to know that the sun is much larger than the earth. The linear velocity of the equator at the time of its rotation.

Far exceeds the linear velocity of our Earth's equator. This is why the observer can reach speeds of up to 70 kilometers per second when it rotates around the sun. This is a centripetal force given to it by the sun's gravitational pull.

to be able to keep the sun spinning at such a high speed without detaching from the sun. <>

And from radio telescopes, we observe the entire solar system.

In the Milky Way.

The Sun carries our 8 planets around the Milky Way at a speed of 220 kilometers per second. The Milky Way is only a local galaxy, and there is a supercluster of local galaxies on top of it. However, our technology is not enough to observe objects further away, so we can't prove what the Milky Way and other supergalaxies are orbiting around, but there is no doubt that they are all moving.

Stars are moving. Stars also rotate and orbit, and their relative motion is much faster than that of the Earth, making it difficult to observe with the naked eye.

In this world, everything moves, and the stars move, but in front of the planets, it feels like the stars are not moving, in fact, the stars are rotating all the time.

Of course it moves, and it can be observed through our existing astronomical telescopes. In the vast universe, there is no celestial body that cannot move, and the trajectory of stars is quite complex.

Yes. There are no immobile stars in the universe, all stars are moving at different speeds.

Stars are stars that emit heat and light to their surroundings, such as the Sun. As for whether it will move? It depends on whether there are other massive stars around it.

And you need to refer to the reference. As far as the center of the universe is concerned, our entire galaxy revolves around the center of the universe.

Everything in the world is in motion, and although the star seems to be constant in the sky, it actually has its own motion. Because different stars move at different speeds and directions, their relative positions in the sky change from one to another, and this change is called the star's self. Among the stars of the day, including those faint stars that are invisible to the naked eye, Barnard's star is the fastest on its own, reaching the arc second per year (1 arc second is 1/3600th of a degree on the circumference).

Stars in general, on their own, are much smaller, the vast majority of which are less than 1 arc second.

The size of the star does not reflect the speed at which the star is actually moving. At the same speed, the distance looks slow, and the distance looks fast. Because Barnard is so close to us, less than 6 light-years, the true speed of movement is only 88

km/s。

Stars are constantly moving, moving in different directions and speeds. We can decompose the velocity of a star relative to the solar system into two sub-velocities according to the vector decomposition method: one is along the direction of the observer's line of sight, which cannot be directly observed, and must be measured by another method.

The other partial velocity is the tangential velocity perpendicular to the observer's line of sight (or the star's self), which is not easily perceptible to the naked eye because the star is so far away. However, if you observe the change of a star's position relative to the background star precisely and over a long period of time, you can determine the magnitude and direction of its tangential velocity. The change in shape of the Big Dipper 100,000 years ago and 100,000 years later is the result of the long-term accumulation of the different tangential velocity directions and magnitudes of these seven stars.

The movement of a star in space relative to the Sun is called the space motion of a star. This motion consists of two components perpendicular to each other, the tangential velocity and the radial velocity. The space movement of stars near the Sun is about 50 kilometers per second.

In fact, the sun is also moving in space. The speed of the Sun's spatial motion towards a nearby star is about kilometers and seconds, and the direction of motion is directed towards a point in the constellation Hercules, a point (see Solar Motion).The difference in the velocity of the star minus the speed of the sun is called the star's intrinsic velocity.

Self and tangential velocity of the star The distance a star travels on a celestial section per unit time is called the angle of self to the observer, and the unit is arc seconds years. Self consists of annual change in right ascension (right ascension self) and declination annual change (declination self) after deducting precession and nutation. More than 200,000 stars have been measured on their own, the largest of which is Barnard in the constellation Ophiuchus, which has reached 10 prizes per year.31

If the distance of the star is known, the linear velocity of the star perpendicular to the direction of the line of sight can be obtained by itself, the tangential velocity of the star. Although the self of the star is easy to find, the distance is difficult to determine, so the tangential velocity of the star is difficult to find accurately, and only a few near stars have accurate data. ，