0
What else can I help you with?
What is the difference between stars that become white dwarfs stars that become neutron stars and stars that become black holes?
The difference is in mass. Low to medium mass stars (up to about 8-10 solar masses) become white dwarfs. Massive stars (10 to 25 solar masses) become neutron stars. Stars above 25 solar masses tend to become black holes.
How big and small can a star be?
Stars can range in size from tiny neutron stars that are only a few kilometers in diameter to supergiant stars that can be hundreds of times larger than our sun. The smallest stars are about 80 times the mass of Jupiter, while the largest stars can have masses that are over 100 times that of our sun.
Why is there a lower mass limit of 0.08 solar-masses for main-sequence stars?
Below about 0.08 solar masses an object will not be able to ignite nuclear fusion. There may be small amounts of deuterium fusion, but it is not sustainable. Objects between 0.08 solar masses and about 13 Jupiter masses are called brown dwarfs.
Why is there an upper mass limit for main-sequence stars of about 100 solar masses?
The upper mass limit for main-sequence stars is around 100 solar masses because the intense radiation and stellar winds in massive stars lead to mass loss through stellar winds and prevent the star from accreting enough material to exceed this limit. Additionally, stars with masses above 100 solar masses would generate such strong radiation pressure that it would overcome the force of gravity, preventing the formation of stable stars with higher masses.
Does 600 billion solar masses equal to 600 billion stars?
Not necessarily. In simplest form, 600 billion solar masses simply means that something is 600 billion times more massive than the sun, regardless of what it is. The sun is more massive than the average star, so if we are talking about stars alone, then 600 billion masses would be equivalent to more than 600 billion stars. It would also depend on what the context is. For example if a galaxy is 600 billion solar masses, much of that mass would be in interstellar gas and dust clouds in addition to stars.
Why will a helium flash never occur in some stars?
A helium flash occurs in low-mass stars during the helium burning phase. High-mass stars do not experience a helium flash because they have a higher core temperature and pressure, so helium burning begins smoothly without the need for a sudden ignition event. Additionally, high-mass stars have higher energy production rates, which prevent the conditions required for a helium flash from occurring.
What is the difference between stars that become white dwarfs stars that become neutron stars and stars that become black holes?
The difference is in mass. Low to medium mass stars (up to about 8-10 solar masses) become white dwarfs. Massive stars (10 to 25 solar masses) become neutron stars. Stars above 25 solar masses tend to become black holes.
What happens to the stars of 2.0 solar mass?
Stars with a mass of 2.0 solar masses will go through various stages of nuclear fusion, eventually ending as a white dwarf. The star will first fuse hydrogen into helium, then helium into heavier elements, expanding into a red giant before shedding its outer layers to form a planetary nebula. The remaining core will cool and condense into a white dwarf.
Does 1 billion solar masses equal to 1 billion stars?
Not exactly; stars come in different sizes; or in this case, different masses. In fact, the large majority of stars are red dwarves, which are smaller - and less massive - than the Sun; therefore, I would suspect that a billion stars (randomly selected - or perhaps all the stars in a small galaxy) would have a bit LESS than a billion solar masses. A "solar mass" is simply a convenient way to visualize large masses; for example, for a supergalactic black hole, "a billion solar masses" is easier to visualize than "2 times 10 to the power 39 kilograms".
How big and small can a star be?
Stars can range in size from tiny neutron stars that are only a few kilometers in diameter to supergiant stars that can be hundreds of times larger than our sun. The smallest stars are about 80 times the mass of Jupiter, while the largest stars can have masses that are over 100 times that of our sun.
How do stars age?
they run out of helium and eventually explode and ruin the entire solar system
The helium flash converts helium nuclei into?
The helium flash converts helium nuclei into carbon nuclei through the fusion process in the core of a star. This process occurs in stars with a mass greater than about 0.8 times the mass of the Sun during the later stages of helium burning. The intense energy released during the helium flash helps stabilize the star against gravitational collapse.
Where in the universe are heavy elements with masses greater that that of helium being produced today?
In the interior of certain massive stars.
Why is there a lower mass limit of 0.08 solar-masses for main-sequence stars?
Below about 0.08 solar masses an object will not be able to ignite nuclear fusion. There may be small amounts of deuterium fusion, but it is not sustainable. Objects between 0.08 solar masses and about 13 Jupiter masses are called brown dwarfs.
Why is there an upper mass limit for main-sequence stars of about 100 solar masses?
The upper mass limit for main-sequence stars is around 100 solar masses because the intense radiation and stellar winds in massive stars lead to mass loss through stellar winds and prevent the star from accreting enough material to exceed this limit. Additionally, stars with masses above 100 solar masses would generate such strong radiation pressure that it would overcome the force of gravity, preventing the formation of stable stars with higher masses.
Which stars are giant stars?
Supergiants are the most massive stars, occupy the top region of Hertzsprung-russell diagram . Supergiants can have 10 to 70 solar masses and luminosity up to hundreds of thousands times the solar luminosity and because of their large masses they have lifespan of few million years and may be less than this value .
Why are there no stars with masses less than 0.08 M?
There are no stars smaller than 0.08 Msun because any object smaller than that is not able to become hot enough to burn hydrogen in their cores. The brightest star in the Earth's sky is called Sirius.
