The Sun loses mass every day. How long would it take to evaporate completely?

Answer 1

All stars experience mass loss at some level through winds. Some stars (Wolf-Rayet in particular, and young protostars) lose mass at breath-taking rates that would eat away the parent star in a matter of a ten million years or so, if the rate was sustained. The prototype WR star of the class loses about 1 solar mass every million years. This is a real problem and the maximum mass of a star is largely constrained by the the Eddington limit where the light pressure from a star or protostar increases as it becomes more massive and eventually exceeds the acceleration due to gravity.

There is a nice laypersons summary of Stellar Winds here:
http://www.peripatus.gen.nz/Astronomy/SteWin.html

Assuming the table is accurate, the sun would lose all of its mass in 1/10^(-14) years. Mass loss rate from fusion is trivial in comparison, of order 10^(-21) solar masses per year.

The sun would evaporate 100 billion years at its current rate of wind production. The sun will undergo several dramatic evolutionary changes before then.

You can think of the formation of a planetary nebula at the end of one solar mass star's life as a short lived very high mass loss wind over just a few thousand years.

Answer 2

It never will. Once another 5000000000 years or so are up, it will be burning hydrogen at a low enough rate that it will get smaller and the pressure and heat in the middle will rise. Eventually the pressure will hit the point at which the helium ash in the center can start fusing, and will expand into a red giant, propelled by an enormous helium explosion. After that it will collapse into a white dwarf, no longer fusing anything but shining for hundreds of billions of years off its own stored heat. You can read about that here:
http://en.wikipedia.org/wiki/Sun#The_sun.27s_history_and_destiny

HOWEVER, if hypothetically the Sun were able to continue burning off mass at the same rate it does now, then it would be burning about 622400000 tonnes of hydrogen every second. As the mass of the sun is around 27*10^27 tonnes, it would evaporate completely in (27*10^27)/622400000 = 4.33804627*10^19 seconds, or about 1.37464391*10^12 (1.3 trillion) years.

Answer 3

Here is the short answer:
Four to five billion years (4-5,000,000,000 years)

The Long Answer:
The Sun will not explode; it is too small to "go nova." It WILL expand as it fuses the last of its core hydrogen. The outer layers of gas will swallow some inner planets (possibly even the Earth). Then the inner parts of the Sun will stop fusing, contract, and become a white dwarf. It will remain a small, hot, slowly- cooling dwarf for many tens of billions of years after that. (It will have most of the heat of a full-sized star, but only a tiny surface area with which to radiate it. Therefore, it will take a very long time to cool down. This will not help us; it will be too cold to support life on Earth by then, even if the Earth could survive the red giant phase.) Scientists based this picture of the Sun's future on the basic nuclear reactions in a star's core. The rates of these reactions depend upon the mass of the star. (smaller stars burn more slowly, and thus longer, than more massive ones, but I could be oversimplifying things.) Scientists use planetary orbits and the laws of orbital dynamics to estimate the mass of the Sun. So, with the mass of the Sun and the rate at which this mass is consumed by fusion, we can guess that the Sun's lifetime will be 9 billion or 10 billion years, total. We know (from Earth's geology and Moon rocks, for example) that the age of the solar system is 4.5 or 4.6 billion years. We think the planets formed at roughly the same time as the Sun. Therefore, based on current scientific theory, the Sun will expand in four or five billion years."

Answer 4

It's true that sun loses its mass, but it doesn't happen by evaporating. What really happens in sun is a kind of nuclear reaction called "nuclear fusion" (in which the nuclei of two or more atoms combine) and in this process a little bit of mass disappers and a big amount of energy is released. (In fact the mass changes into the energy)

Our sun is mostly made up of hydrogen and helium.In the center of the sun,4 hydrogen nuclei fuse to become 1 helium necleus. In this process a little bit of mass is lost (the helium atom weighs less than the four nuclei that combined to form it),which is changed into energy and will be emitted into space as radiant energy.

In about 5 billion years, the hydrogen in the center of the Sun will start to run out. The helium will get squeezed. This will speed up the hydrogen burning. Our star will slowly puff into a red giant. It will eat all of the inner planets, even the Earth.
As the helium gets squeezed, it will soon get hot enough to burn into carbon. At the same time, the carbon can also join helium to form oxygen. The Sun is not very big compared to some stars. It will never get hot enough in the center to burn carbon and oxygen. These elements will collect in the center of the star. Later it will shed most of its outer layers, creating a planetary nebula, and reveal a hot white dwarf star.

Nearly 99 percent of all stars in the galaxy will end their lives as white dwarfs. By studying the stars that have already changed, we can learn about the fate of our own Sun.

Answer 5

The sun will never evaporate completely. The reason for this is because, well before the needed amount of time for evaporation the sun will run out of nuclear fuel. When the sun enters into the last stages of its life it will eject vast amounts of its remaining surface into space; however, a very dense, cooling core will remain: forever.

Answer 6

you cant 2 kilos a week is the perfect you will do (some weeks 3, some 2) and to get that to ensue, you should consume 1200 energy an afternoon or lesss and exercising lots you would be hungry so i propose busy your self with some thing new, to maintain it sluggish busy, rtight as much as bedtime even its the only way in case you attempt to exceed the two-3 pound each week maximum your physique can do, you will purely make your metabolism close down, after which you nevertheless wont drop extra pounds, additionally..in case you lose it too quickly (or consume poorly, or dopnt do exercising properly) ypou will lose muscle extremely of fat..and so finally end up with a baggy physique so dont be so irritating approximately weight alleviation difficulty extra approximately healkth..your weight will circulate to regularly occurring and stay there in case you reside healthil;y

Answer 7

Yes its true that Sun is going to evaporate completely, but it will take too much time.but science has developed in that way which is out of limit i.e. if we can study about whole Universe then in this time then why won't scientist study in their advance future to make an Artificial Sun?


But you don't worry about it ,according to me "There is nothing forever i.e. everything has limited time period"

Answer 8

10 billion years.

Answer 9

It just burned out. We have 9 minutes to live! use them wisley!