AnswersDriveA star is born when atoms of light elements are squeezed under enough pressure for their nuclei to undergo fusion. All stars are the result of a balance of forces: the force of gravity compresses atoms in interstellar gas until the fusion reactions begin.
How stars are formed step by step?
Steps to the formation of stars and planets:
- Clouds of gas form within galaxies.
- Formation of structure within the gas clouds, due to "turbulence" and activity of new stars.
- Random turbulent processes lead to regions dense enough to collapse under their own weight, in spite of a hostile environment.
How is a red giant star formed?
Laura, A Red Giant star is formed when a star like our sun, or one larger, runs out of its hydrogen fuel. Inside a star, hydrogen atoms are combined together to form helium atoms.
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How black holes are born?
But in more massive objects, gravity ultimately wins. Stellar-mass black holes are born with a bang. They form when a very massive star (at least 25 times heavier than our Sun) runs out of nuclear fuel. The star then explodes as a supernova.
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How a star is created?
Star Formation. Stars form inside relatively dense concentrations of interstellar gas and dust known as molecular clouds. These regions are extremely cold (temperature about 10 to 20K, just above absolute zero). Star formation begins when the denser parts of the cloud core collapse under their own weight/gravity.
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Why is a star called a red giant?
Don't panic, we've got another 7 billion years or so before the Sun becomes a red giant star. As you probably know, stars shine because they're converting hydrogen into helium in their cores through a process called nuclear fusion.
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What is the name of the biggest star?
The largest stars, in contrast, will be cool supergiants. Case in point, VY Canis Majoris is only 3,500 Kelvin, and a really big star would be even cooler. At 3,000 Kelvin, Humphreys estimates that cool supergiant would be as big as 2,600 times the size of the Sun.
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How does a protostar become a star?
A protostar becomes a main sequence star when its core temperature exceeds 10 million K. This is the temperature needed for hydrogen fusion to operate efficiently. The length of time all of this takes depends on the mass of the star. The more massive the star, the faster everything happens.
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How planets are born?
A cloud collapses to form a star and disk. Planets form from this disk. According to our current understanding, a star and its planets form out of a collapsing cloud of dust and gas within a larger cloud called a nebula.
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How stars are born and how they die?
Stars are born, grow up, and eventually die. The exact way that stars change as they age (or how they evolve) depends on how massive they are at birth. Stars are born when large gas clouds collapse under gravity. They form hot cores that gather more and more gas and dust until a protostar is formed.
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How stars are formed step by step?
Steps to the formation of stars and planets:
- Clouds of gas form within galaxies.
- Formation of structure within the gas clouds, due to "turbulence" and activity of new stars.
- Random turbulent processes lead to regions dense enough to collapse under their own weight, in spite of a hostile environment.
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How the galaxy was formed?
Galaxy Formation. One says that galaxies were born when vast clouds of gas and dust collapsed under their own gravitational pull, allowing stars to form. The other, which has gained strength in recent years, says the young universe contained many small "lumps" of matter, which clumped together to form galaxies.
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What happens to a star when it dies?
The core finally cools into a white dwarf, then a black dwarf. This is what happens when a normal-sized star dies. If a really huge star dies, it has so much mass that after the helium is used up, it still has enough carbon to fuse it into heavy elements like iron. When the core turns to iron, it no longer burns.
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How do stars live?
Stars live different lengths of time, depending on how big they are. A star like our sun lives for about 10 billion years, while a star which weighs 20 times as much lives only 10 million years, about a thousandth as long. Stars begin their lives as dense clouds of gas and dust.
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Are all the stars planets?
Stars make their own light, just like our sun (the sun is a star — the closest star to Earth). But the stars are very, very far away from our solar system so they appear to be very tiny to us, even though up close they are large. The planets are much closer, inside our solar system.
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Where does most of the star formation take place in our galaxy?
19) Where does most star formation occur in the Milky Way Galaxy? A) It occurs throughout the disk of the galaxy at a uniform rate. B) It occurs in the galaxy's spiral arms.
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What is a black hole and how is it formed?
Stellar black holes form when the center of a very massive star collapses in upon itself. This collapse also causes a supernova, or an exploding star, that blasts part of the star into space. Scientists think supermassive black holes formed at the same time as the galaxy they are in.
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How many stars are being born?
However, if we once again assume that our own Milky Way Galaxy represents an average type of galaxy, we can calculate that there are roughly 150 billion stars born per year in the entire Universe. This corresponds to about 400 million stars born per day or 4800 stars per second!
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How the heavier elements are formed?
The formation of elements heavier than iron and nickel requires the input of energy. Supernova explosions result when the cores of massive stars have exhausted their fuel supplies and burned everything into iron and nickel. The nuclei with mass heavier than nickel are thought to be formed during these explosions.
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How does a star dies?
Star death. Most stars take millions of years to die. When a star like the Sun has burned all of its hydrogen fuel, it expands to become a red giant. This may be millions of kilometres across - big enough to swallow the planets Mercury and Venus.
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How a Nebula is formed?
Star-forming regions are a class of emission nebula associated with giant molecular clouds. These form as a molecular cloud collapses under its own weight, proceeding stars. Massive stars may form in the center, and their ultraviolet radiation ionizes the surrounding gas, making it visible at optical wavelengths.
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What causes a supernova to occur?
Having too much matter causes the star to explode, resulting in a supernova. The second type of supernova occurs at the end of a single star's lifetime. As the star runs out of nuclear fuel, some of its mass flows into its core. Eventually, the core is so heavy that it cannot withstand its own gravitational force.