How long does a star exists. After the time of existance is over what happens to the star?

Answer 1

There is more than one answer to this question. Typically, stars will exist for the order of 1 to 10 billion years. Then, depending on their size, they will either do a supernova number or just poop out and become either a white drawf, a black drawf, or a black hole.

Answer 2

The life of the star depends on the size and properties of the star. A star like our Sun which goes through hydrogen fusion would "live" about 10 billion years until it runs out of hydrogen in its core and stars to fuse helium in its upper atmosphere. It will grow large and cold and will become a red giant. When it becomes a red giant it will grow 10 times its original size and would easily engulf the Earth.After this it would either become a white drawf (Sirius B) or it would go through Supernova 1 or 2 and implode then explode into a neutron star or black hole. Since our star is estimated to be 5 billion years old, it still has another 5 billion years on its life cycle. Research stellar death for more information.

Answer 3

How long does a star exist? Every star's life is different. Pick a number. No one knows precisely how long they exist. lets just say that most live longer than a number I could pronounce.
When our Sun dies out -- guess what that is when REAL GLOBAL freezing happens. So in the big world of reality global warming is only a temporary thing.

The old star may act much like our moon with no active life or heat.

Answer 4

Stars are generally made up of Hydrogen cloud so the star which is of sun's size may end as Black Dwarf in the middle a stage Red Giant which sun will evolve into ,In red giant after millions of yrs the envelope which consists of Hydrogen is thrown away due to the energy liberated during fusion of H and Gravitational pull towards the core, The envelope is a Hydrogen cloud ,this is called Planetary Nebulae ,this may once again contact into gravity to form a new star.
The stars which are 5 times than the sun die as Neutron stars after the Supernovae explosion which is so bright that it can be seen on day . The sphere of neutrons may once turn to be a star.For your reference you can refer X std Karnataka State Physics book.

Answer 5

The life span depends mostly on the size of the star. Larger star last the shortest. Stars like our sun which is slightly smaller than average last about 10 billion years more or less unchanged. Small stars can last 50 billion years though this is an educated guess since the universe is only 13.5 billions years old. A star like the sun will swell and become a super giant in about 5 billion years swallowing the earth unless our far distant descendant or inheritor moves it. Eventually the sun will cool and shrink and become very small and enter white dwarf stage which will last billions more years. Finally it will become a dark, cold mass and stay that way forever.

Answer 6

A star like our own lasts around 10 billion years. We are at around 4.3 billion years now. A larger star will last longer, since it has more fuel to burn and may be able to fuse heavier elements than ours can, which will extend it's life.

In the end, all stars run out of fuel. A star's life exists equilibrium. The gravity pulls it in on itself, makes it want to colapse. It's that force inwards that causes it's atoms to bounce around, eventualy an atom will bounce off another so hard they fuse into one atom. This is called nuclear fusion. Fusion is an explosive force and pushes outward.

So, Gravity pulls it in until it starts Fusion. That pushes it back out. It lives in that balance until it's not big enough to fuse the heavier atoms it produced. Then the star colapses so suddenly it causes a lot of it's outer layers to burst off into space.

For a star about the size of our Sun, the remnants will colapse down only part way and become a dense white dwarf.. which will spend billions and billions of years cooling off. Larger stars form Neutron stars, which are smaller and denser and the very largest will colapse down forever and become black holes.

Answer 7

The life of a star depends on different factors. mainly it depends on the rate of fusion reaction happening with in itself. more faster the rate more the chance of death. if the size of the star is big then there will be more deuterium and tritium therefore more reaction will happen.After the death the Star would turn into a mysteries black object which scientist call as black holes.these black holes are very powerful such that they don't even allow a light ray to pass it.they will attract it towards it with its gravity.these black holes could not be seen by naked eye or even by advanced telescope.they could only be seen by infra red telescopes.

Answer 8

Stars last for 5 to 10 million years and after they run out of fuel they blow themselves up in the stage that is called a supergiant and they Then just die and become white dwarfs

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Answer 9

Friend,
This information is from wikipedia.I have selected some parasIf you need you ccan visit the site and read completely.here we go:

A star is a massive, luminous ball of plasma. Stars group together to form galaxies, and they dominate the visible universe. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth, including daylight. Other stars are visible in the night sky, when they are not outshone by the Sun. A star shines because nuclear fusion in its core releases energy which traverses the star's interior and then radiates into outer space. Without stars, life and most atomic elements present in the Universe would not exist.

Stars spend about 90% of their lifetime fusing hydrogen to produce helium in high-temperature and high-pressure reactions near the core. Such stars are said to be on the main sequence and are called dwarf stars. Starting at zero-age main sequence, the proportion of helium in a star's core will steadily increase. As a consequence, in order to maintain the required rate of nuclear fusion at the core, the star will slowly increase in temperature and luminosity.The Sun, for example, is estimated to have increased in luminosity by about 40% since it reached the main sequence 4.6 billion years ago.

Every star generates a stellar wind of particles that causes a continual outflow of gas into space. For most stars, the amount of mass lost is negligible. The Sun loses 10−14 solar masses every year, or about 0.01% of its total mass over its entire lifespan. However very massive stars can lose 10−7 to 10−5 solar masses each year, significantly affecting their evolution. Stars that begin with more than 50 solar masses can lose over half their total mass while they remain on the main sequence.


An example of a Hertzsprung-Russell diagram for a set of stars that includes the Sun (center). The spectral class is equivalent to a classification of stars by their surface temperature, with higher temperatures to the left. The duration that a star spends on the main sequence depends primarily on the amount of fuel it has to burn and the rate at which it burns that fuel. In other words, its initial mass and its luminosity. For the Sun, this is estimated to be about 1010 years. Large stars burn their fuel very rapidly and are short-lived. Small stars (called red dwarfs) burn their fuel very slowly and last tens to hundreds of billions of years. At the end of their lives, they simply become dimmer and dimmer, fading into black dwarfs.

Answer 10

It all depends on the size of the star, there really isn't one set time for all of them, otherwise we wouldn't have the sun today. When its existance is over it blows up.