How the mass of the sun is measured

Through the law of gravitation.

to measure, gmm r2 = mv 2r

The quantity that needs to be known is the gravitational constant.

Hope my return is helpful to you.

Wu Fengjing and woskxnqpalzm

The method is right, the mass of the earth can be eliminated after the coupling, as long as the distance between the sun and the earth is known, and the measurement of this distance has long been solved, the method is as follows:

The basic astronomical method of determining the distance of celestial bodies (within the solar system) is the triangulation method commonly used in geodesy. When the radius of the Earth is known, the distance of a celestial body is estimated by measuring its horizontal parallax. However, when determining the distance between the sun, it is difficult to use this method directly due to the long distance, the low horizontal parallax, and various technical difficulties.

Therefore, astronomically calculates the distance of the sun by measuring the distance of an asteroid. Let the distance between the Sun and Earth be a, and the distance between an asteroid and the Sun that is closer to the Earth is A1. When an asteroid is at opposition, i.e. when the asteroid is closest to the Earth, its horizon parallax is measured to calculate its distance from the Earth.

This distance is.

a1-a, which is the difference between the orbital radius of the asteroid and the Earth. According to Kepler's third law, the ratio of the squares of the orbital periods of the two planets is equal to the ratio of the cubes of their distance from the sun, and the system of equations about a1 and a can be listed, so that a1 and a. can be solved

1: Gravitational force between the Earth and the Sun: f=gmm r*r (g is the gravitational constant, m is the mass of the sun, m is the mass of the earth, and r is the distance between the earth and the sun).

2: The centripetal force of the earth: f=ma=4mv*v r (v is the speed of the earth's revolution, which can be calculated by the distance between the sun and the earth and the revolution period of 1 year).

It can be calculated by the coupling of these two formulas.

According to the gravitational force, f=gmm r*r

Knowing the force, the mass of the earth, the distance is fine.

g is a constant.

Let's start with Kepler's law.

The total mass of the Sun, about kilograms (generally taken as kilograms). It can be expressed as m in the unit symbol: the mass of the Sun is 330,000 times the mass of the Earth.

The sun

It is the central body of the solar system and occupies the overall mass of the solar system. The eight planets in the solar system, asteroids, meteors, comets, outer Neptune objects, and interstellar dust all revolve around the Sun, which revolves around the center of the Milky Way.

The Sun is a star located at the center of the solar system, and it is almost an ideal sphere intertwined with hot plasma and magnetic fields. The diameter of the Sun is about 1,392,000 (kilometers, equivalent to 109 times the diameter of the Earth; It is about 1.3 million times the size of the Earth.

In terms of chemical composition, about three-quarters of the mass of the Sun is now hydrogen, and almost all of the rest is helium, including oxygen, carbon, neon, iron, and other heavy elements with less than 2% of the mass, which uses nuclear fusion to release light and heat into space.

The Sun is currently passing through the local interstellar cloud in the local bubble of the Orion Arm at the inner edge of the Milky Way. At a distance of 17 light-years from Earth, there are 50 of the closest star systems (the closest star to the Sun is a red dwarf called Proxima Centauri, about light-years).

The Sun is a yellow dwarf (spectrum G2V), the lifespan of a yellow dwarf is roughly 10 billion years, and the Sun is currently about 100 million years old. In about 50 to 6 billion years, the Sun's interior will be almost completely depleted of hydrogen and the Sun's core will collapse, causing the temperature to rise, a process that will continue until the Sun begins to fuse helium into carbon.

Although helium fusion produces less energy than hydrogen fusion, it is also hotter, so the outer layers of the sun will expand and release a portion of the outer atmosphere into space. At the end of the process of turning to new elements, the mass of the Sun will decrease slightly, and the outer layers will extend to the current orbit of the Earth or Mars (at which point the two planets will be farther away from the Sun due to the decrease in the mass of the Sun).

The above content refers to the encyclopedia - the sun.

1: Gravitational force between the Earth and the Sun: f=gmm r*r (g is the gravitational constant, m is the mass of the earth, m is the mass of the earth, and r is the distance between the earth and the sun).

2: The mental force of the earth to the witherer: f=ma=4mv*v r (v is the speed of the earth's revolution, which can be calculated by the distance between the sun and the earth and the revolution period of 1 year).

It can be calculated by the coupling of these two formulas.

It can be obtained from the formula of gravitational force. The gravitational force of the Sun on the Earth is gmm r 2 and the centripetal force of the revolution of the earth is mv 2 r

The two are equal to the brothers. Approximately remove the mass of the Earth m, and the mass of the Sun is m=v 2r g

where v is the comma velocity of the earth's revolution, r is the radius of the earth's revolution, and g is the gravitational constant.

The mass of the solar line is about 2 10 tons, or about 332,946 earth's mass. Since the Sun occupies the total mass of the solar system, the mass of the Sun is the largest in the solar system. The mass of the Sun is extrapolated by measuring its gravitational effect, and the observed data show that the Jingchang mass of the Sun is relatively stable, which is the benchmark mass in the rolling of the solar system.

1. The Sun is the central celestial body of the solar system, accounting for % of the overall mass of the solar system. The eight planets, asteroids, meteors, comets, outer Neptune objects and interstellar dust in the solar system all revolve around the Sun, while the Sun revolves around the center of the Milky Way. 2. The Sun is a star located at the center of the solar system, and it is almost an ideal sphere intertwined with hot plasma and magnetic field. The diameter of the Sun is about 106) kilometers, which is 109 times the diameter of the Earth; It is about 1.3 million times the size of the Earth. Its mass is about 2,1030 kilograms (330,000 times that of the Earth).

In terms of chemical composition, about three-quarters of the mass of the Sun is now hydrogen, and the rest is almost all helium, including oxygen, carbon, neon, etc