sun is loosing mass as radiation. if its so planets has to move away from the sun prop to its mass.is it so?

Question

in physics we studied that the force of attraction between two bodies depend on their mass . if sun is loosing its mass as radiation then the distance between the planet and the sun should increase is it true if not anybody explain me please

Answer 1

its a lot more complicated than that. Yes the sun regulary loses mass as it converts plasma into light and energy and heat. But much of this reaches the planets and objects orbiting it. Chemical reactions occuring as a result keep the energy in the solar system. Larger objects don't regualry lose their mass but they do gain mass, not mainly from sunlight and heat reactions but their own gravity attracts objects. This would also affect orbital paths. But if all this is comparitive, the effect could keep a balance, planets orbiting the sun not merely from it's own orbit but kept in a stasis by the strengths of surrounding planets and objects.

Finally remember that the sun is hugely massive, there is an event horizon and objects regulary get pulled into it's path and in turn become part of it. This is far less than that being let go but it does have an effect.

Answer 2

The Sun does loose mass indeed.
However since the solar system function as a Unit ,it must maintain rotational equilibrium.
Thus if mass is lost from the larger mass which is the Sun,the earth's orbit must decrease in order to keep the same rotational energy. AS the orbit radius would decrease the Earth's velocity would remain the same.
However if the sun"s mass was to increase because the sun is moving relative to our Galaxy the scenario changes. .However if true as per Relativity theory a moving mass always increases. so on that basis the opposite would occur.
Now similarly if the earth'smass was to increase in same percentage as the sun 's mass the the orbit radius would increase.

Present observation shows that the earth spin and orbit is slowing down that means that there is a precession of the earth's perehelium just as there is one for mercury which had been calculated both by Paul Gerber and Albert Einstein

Answer 3

The sun is losing mass, and if this were the only effect involved then yes we would be slowly moving away from the sun. However, the earth is slowly gaining mass by picking up cosmic debris (losing a bit too, but the net is a gain), and the earth is experiencing the slightest friction orbiting the sun (space is not ABSOLUTELY empty) so the orbit is slowing, which will cause it to move toward the sun.

I think the net effect of all of this is the earth is creeping toward the sun even though the effects you described act in the manner you described.

Answer 4

About 74% of the Sun's mass is hydrogen, 25% is helium, and the rest is made up of trace quantities of heavier elements. The Sun is about 4.6 billion years old and is about halfway through its main-sequence evolution, during which nuclear fusion reactions in its core fuse hydrogen into helium. Each second, more than 4 million tonnes of matter are converted into energy within the Sun's core, producing neutrinos and solar radiation. In about 5 billion years, the Sun will evolve into a red giant and then a white dwarf, creating a planetary nebula in the process.

The Sun appears to have been active for 4.6 billion years and has enough fuel to go on for another five billion years or so. At the end of its life, the Sun will start to fuse helium into heavier elements and begin to swell up, ultimately growing so large that it will swallow the Earth. After a billion years as a red giant, it will suddenly collapse into a white dwarf -- the final end product of a star like ours. It may take a trillion years to cool off completely.

As Earth's sun is of one solar mass, it is expected to become a red giant in about five billion years. It will become sufficiently large to engulf the current orbits of the solar system's inner planets, including Earth. However, the gravitational pull of the sun will have weakened by then due to its loss of mass, and it is possible that Earth may escape to a wider orbit[6]. The fate of the Earth with regard to the size of the expanding Sun is still hotly debated in the scientific community. Mercury and Venus will almost certainly be swallowed up by the Sun when it turns into a red giant.

Answer 5

It is true that sun is loosing mass as radiation. But you do not have to worry because it will take hundreds of years for our solar system to collapse and in between so many other things can also happen. So do not worry and enjoy life as of now.

Answer 6

The amount of mass isn't enough to really notice. The sun will blow up and burn out long before enough mass is lost to change the amount of gravitational force.

Answer 7

Interesting question. I have never heard it posed before. The concept is obviously valid, and it does have a bearing on what shall happen to our planet. I expect, because of the size of our sun, things have remained stable.

Answer 8

I always thought that the sun was to swell into a red giant before it diminishes, the sun has quite some life ahead of it still.