How big is the gravitational pull of the sun? Why does Neptune, billions of kilometers away, orbit i

How big is the gravitational pull of the sun? Not to mention that Neptune, which is 4.5 billion kilometers away from the sun, orbits it, but Pluto and Kuiper belt objects, which are farther away than Neptune, are orbiting the sun. How strong is the gravitational pull of the sun?

The answer is: the gravitational pull of the sun is as big as the solar system!

Illustration: The sun.

The solar system refers to the celestial system with the sun as the center and composed of all celestial bodies that are subject to the sun's gravitational constraints. As long as the gravitational pull of the sun touches the range, it is part of the solar system. Although Neptune is 4.5 billion kilometers from the Sun, which is almost 30 times the distance from Earth to the Sun, it is far from the edge of the solar system.

Illustration: Neptune and Uranus.

In addition to Neptune, there are many Kuiper Belt objects such as Pluto and Eris. Scientists believe that beyond the Kuiper Belt, there is a globular nebula called the Oort cloud that envelops the entire solar system. This is the birthplace of long-period comets.

The Oort cloud is about 50,000 to 100,000 days from the Sun. In other words, the distance from here to the sun is 50,000 to 100,000 times the distance between the sun and the earth. We know that the average distance from the Earth to the Sun is 100 million kilometers.

Thus, the Oort cloud is about a trillion kilometers to 15 trillion kilometers from the Sun. The Oort cloud is the top 10 outer edges of the solar system.

Imagine what a long distance this is. For distance, we can use another unit of distance, light years. Thus the gravitational pull of the solar system ranges to light years.

Pictured: Oort clouds at the edge of the solar system.

Why can the sun's gravitational pull affect so far away? We have found that there is a law in the movement of celestial bodies in the universe, that is, the objects with small mass are orbiting around the objects with large masses. The Moon revolves around the Earth, and the Earth revolves around the Sun.

The Sun and the celestial bodies in the Solar System, as well as the many stars in the Milky Way, revolve around the massive black hole at the center of the Milky Way.

Diagram shows space-time warping.

The mass of the Sun is the largest in the solar system. The mass of the sun occupies the mass of the entire solar system, and the mass of the rest of the solar system is only the total mass of the solar system. Therefore, in the solar system, the huge mass of the sun causes a huge space-time distortion, and the celestial bodies around the sun are trapped in the sun's distorted space-time, and can only obediently revolve around the sun.

The Sun is dozens of times the size of the Earth, and its gravitational pull is enormous, and it takes hundreds of years for Neptune to revolve around it.

Because the mass of the Sun is so large, occupying the total mass of the solar system, its gravitational pull is also very large, 330,000 times that of the Earth, so that Neptune, which is billions of kilometers away, orbits it.

The gravitational pull of the Sun is very large, with a boundary of about 10,000 to 100,000 astronomical units, so even if Neptune is billions of kilometers away from the Sun, it will revolve around the Sun.

The Sun, as the star in the solar system, is the most massive celestial body. The greater the mass, the greater the gravitational pull. So Neptune orbits the Sun.

As a planet, Neptune's orbital velocity, its distance from the sun, and its own mass are just enough to form a balance of centripetal and centrifugal forces, thus forming the orbit of Neptune as we know it now.

The gravitational force between two objects that can be regarded as particles can be calculated using the following formula:

f=gmm/r（2）

When moving in a circle on the surface of a planet, the gravitational force can be regarded as gravity, and there is both f=gmm r(2)=mg

You should be asking about gravitational acceleration g, 1, the eight planets.

The acceleration of gravity g is :

Mercury. acceleration due to gravity in meters square seconds; g

Venus: acceleration due to gravity in meters square seconds; g

Earth: gravitational acceleration meters square seconds; g

Mars: gravitational acceleration meters square seconds; g

Jupiter: gravitational acceleration meters square seconds; g

Saturn. acceleration due to gravity in meters square seconds; g

Uranus: gravitational acceleration meters square seconds; g

Neptune. acceleration due to gravity in meters square seconds; g

I was speechless, how did the few people upstairs discuss the speed of the universe.

First question:

Using the law of gravitation f=gm1m2 r2 to calculate the result, the result is 22nd power n [i.e., trillions billions of newtons] (the data comes from page 107 of Chapter 6 of Volume 1 of the current physics textbook of Renjiao), which is relatively accurate.

Second question:

The space currently believed to be controlled by the Sun's gravity is a radius of 100,000 astronomical units, and since gravity is gradually decaying, there can be no obvious boundaries in fact. However, this value is generally available in the available information.

Of course, in terms of the escape velocity of the Sun: the second cosmic velocity of the Sun, the extent that the Sun's gravitational pull "controls" will be determined by the direction and speed of the object's motion.

The third question:

Outside of our solar system, there is another solar system with a gravitational range. The stars are too far away for the gravitational pull of the middle part of the space to reach. The stars are relatively close together, and there will be a region of zero gravity between the two stars due to the cancellation of gravity (similar to the "Lagrang day").

Theoretically, as long as a celestial body can reach the third cosmic velocity, it will not be captured by the solar system, that is, it can enter and exit the solar system at will, and it cannot simply say how far the celestial body can be captured.

No matter how far away a celestial body is, as long as it enters the gravitational radius of the sun at less than the third cosmic velocity, then it will definitely be captured by the sun.

Upstairs misunderstood the definition of cosmic velocity, 1, 2, 3 cosmic velocity are all based on the earth as a reference, so you are wrong to say that any celestial body must be greater than the third cosmic velocity to ensure that it is not captured by the sun's gravity, for example, the farthest dwarf planet Pluto has an orbital velocity of less than 5 kilometers per second, why? Gravity has a lot to do with distance, the farther away from the Sun, the less speed is required to rely on the Sun's gravity, if you launch a rocket on Pluto, the relative Sun's velocity is greater than 5 kilometers per second.

In fact, I have seen a lot of questions on the Internet about cosmic velocity, many people do not really understand the definition of cosmic velocity, here I will explain: the second cosmic velocity refers to the earth emitting an object to the second velocity, you can ask the earth's gravity, the third cosmic velocity, the same is true, the earth emits an object, even if you throw a stone, the speed reaches the third velocity, you can get rid of the sun's gravity. First, the second cosmic velocity does not exist to curve away from the Earth or the Sun, it is the minimum velocity calculated in the darkly perpendicular direction, so reaching this velocity can be achieved in either direction to get rid of the gravitational pull of the Earth or the Sun.

The second floor also needs to be corrected, we say cosmic speed, but we don't say the direction of launch, this is true in cosmic velocity, as long as it exceeds the second cosmic velocity, whether you launch vertically or horizontally, you must be able to leave the earth, because the kinetic energy is enough for the object to be launched to infinity.

So it is a complete misunderstanding to think that the minimum speed required for vertical launch is complete. The third cosmic velocity is limited in direction, and the launch direction must be in the direction of the earth's revolution, and the speed at this time is the smallest, because if it does not follow the earth's rotation speed, the required speed must be greater.

The most important thing for solar energy to capture the stars is to look at the relationship between the local escape speed of the star and the running speed. Theoretically, the gravitational field of the Sun is infinite, but it is more significant at close range.

The radius of the solar system is determined

1.With Pluto's orbit as the boundary, it is about 40 astronomical units.

2.According to the comet's origin hypothesis, the Kuiper Comet Belt is 50 1000 AU; The Oort cloud, which is 100,000 astronomical units light-years.

3.According to the heliopause, it is 100 160 AU.

4.The theoretically calculated gravitational range of the solar system is 15,230,000 astronomical units.

Note: 1 astronomical unit is about 100 million kilometers.

1 light year is about a kilometer.

Infinite, attractive wherever you go, it's just a matter of size ...

Solar system. There are eight planets, and there is such a beautiful blue planet, which is more than 30 times closer to the Sun than the Earth and the Sun, and it is Neptune.

Neptune is more than 30 times farther from the Sun than the Earth, about 2.8 billion miles, or about 4.5 billion kilometers. Neptune is the farthest planet in the solar system and occupies the eighth place in the solar system. Because it is so far away, it takes almost four hours for the sun to arrive.

Because of its distance, Neptune has the longest orbit in our solar system. Because of this, it takes about 165 years to make one revolution around the sun, and each season lasts a little over 40 years. Its surface temperature becomes very low, with an average temperature of minus 373 degrees Fahrenheit.

That is, Celsius.

Like its neighbor Uranus.

Likewise, it is also known as the Ice Giant. It is about 30,599 miles in diameter, or about four kilometers in diameter, about four times the size of Earth, and is the fourth largest planet in the solar system.

Even its solid core is about twice the size of the Earth, accounting for about 45% of its own total. This core is made of water, glacial, and silicate.

Rocks, while the rest of the planet is thought to be made up of water, methane.

and aminopropion. The planet is encased in a cloud of hydrogen and helium, which is made up of hydrogen and helium, as well as methane. So this planet has a beautiful bright blue star appearance, but don't be fooled by the beautiful blue appearance because Neptune is the solar system stroke.

The largest planet, these winds are three times stronger than Jupiter and nine times stronger than what we have experienced on Earth.

Tornado on Neptune.

It's almost as big as Earth, but outside of this planet with super-large storms, there is a set of tranquil auras and moons. Of these 40 known satellites, Triton.

is the largest and only moon in the solar system with a rotation direction opposite Neptune, suggesting that Neptune has at least five main rings. According to NASA's Voyager.

The captured data has a lot to discover about the last planet in the solar system. Neptune, like his neighbor Uranus, probably formed about 4 billion years ago.

Neptune is the farthest planet from the Sun among the eight planets in the solar system, the fourth largest in the solar system in terms of volume, but the third in terms of mass. Neptune is smaller than Uranus in diameter and volume, but has a larger mass than Uranus, about 17 times that of Earth.

Neptune. Neptune's biggest feature is that the storm on Neptune is the fastest in the solar system, reaching speeds of 2,000 kilometres per hour.

It occupies the eighth place in the solar system because it is so far away that it takes four hours for sunlight to see.

Because it was formed in the solar system, the gas that originally existed in the solar system was absorbed by Jupiter, and Neptune may be a gaseous planet flying outside the solar system, captured by the sun's gravity.

Because of the problem of gravity, Neptune is the farthest away and therefore the coldest planet. And the Musun Servant Star Qi Kaiyuan itself has a very large mass, and the surrounding area is surrounded by atmospheric layers, so it seems that he is even bigger.

Through the ** of the astronomical telescope, it can be seen that Neptune is farthest from the Sun, and it is intuitive, Jupiter is also seen by such means.

There is no way to estimate the gravitational pull of the Sun in an exact number, but what we do know is that the Sun is the core of the entire solar systemAll the planets in the solar system revolve around the sun or are affected by the sun's gravity, and at least eight planets are strictly bound by the sun's gravity. <>

The one revolving around the sun is a punishment, not a star, because there is only one star in the entire solar system, the sun is the meaning of the star, which is almost fixed in space, and the position of the small instrument where he is located is relatively stationary, and then it can emit light and heat the central celestial body, but there is only one star in the entire solar system, so there is no star rotating around the sunAll planets or moons revolve around the sun. Because different celestial systems have different definitions of planets and moons. <>

The sun can become the core of the entire solar system, and become the only star in the solar flag, because the sun itself has a large mass, the sun occupies 90% of the mass of the entire solar system at the beginning of its formation, and its volume itself is not so large, at least relative to the earth, its density is much greater than the earth, so it leads to his high pressure on space, forming a very large gravitational force, and all the premises in the entire solar system must be bound by the sun's gravityIt's just that the planets of the Sun are less affected by the planets of the Earth, such as the Earth's Moon. <>

The sun's gravity is the most critical force to maintain the stable balance of the entire solar system, and the reason why so many celestial bodies can operate in a safe and orderly manner without colliding is because the various celestial bodies have been bound when the sun was formed many, many years ago, and can only run in a fixed orbitHe can't go wherever he wants, of course, he is not simply good, the disadvantage is that if human beings want to fly out of the solar system, the first thing to do is to overcome the influence of the sun's gravity on objects.