Which stage lasts the longest?
The Star remains the longest in the stage when it is burning Hydrogen into Helium. For our Sun this is called the main sequence stage which will last for about 4.5 Billion years more , this depends on how fast the star is burning up fuel. For more massive stars this stage lasts for a few hundred million years.
What do astronomers mean when they say we are all Starstuff?
Only $2.99/month. What do astronomers mean when they say that we are all “star stuff”? A) that life would be impossible without energy from the Sun.
Why are main-sequence lifetimes shorter for more massive stars?
All main-sequence stars are made of the same stuff, mainly H and He. So why do massive stars have shorter lifetimes? After all, they have more fuel to burn. A star with 60 times the mass of the Sun has 60 times as much nuclear fuel as the Sun, but burns it H more rapidly.
What happens to the core of a star after a planetary nebula occurs?
what happened to the core of a star after a planetary nebula occurs? glowing cloud of gas removed from a loss mass star at the end of its life. After, the exposed core will be hot and release ultraviolet radiation.
What happens when a star exhausts its core hydrogen supply?
Once a star has exhausted its supply of hydrogen in its core, leaving nothing but helium, the outward force created by fusion starts to decrease and the star can no longer maintain equilibrium. The force of gravity becomes greater than the force from internal pressure and the star begins to collapse.
What happens when a star exhausts its core suddenly?
What happens when a star exhausts its core hydrogen supply? A) Its core contracts, but its outer layers expand and the star becomes bigger and brighter.
What determines if a star will eventually fuse oxygen into a heavier element in its core?
In order to predict whether a star will eventually fuse oxygen into a heavier element, you mainly want to know what fact about the star? -Mass determines whether the star’s core will ever be compressed enough to fuse oxygen. Why is a 1 solar-mass red giant more luminous than a 1 solar-mass main sequence star?
Why does a star grow larger immediately after it exhausts its core hydrogen quizlet?
Hydrogen fusion in a shell outside the core generates enough thermal pressure to push the upper layers outward. Why does a star grow larger after it exhausts its core hydrogen? The core quickly heats up and expands.
What will happen to the star after stage VIII?
What will happen to the star after stage viii? Its outer layers will be ejected as a planetary nebula and its core will become a white dwarf.
What will happen to very low mass stars as they begin to exhaust their hydrogen group of answer choices?
Very low mass stars that are very active due to magnetic fields. When ever the stars core hydrogen is depleted , nuclear fusion will cease. Without fusion to supply thermal energy the star Will become out of balance for the first time. This causes the core to shrink.
What happens to the core of a high mass star after it runs out of hydrogen?
What happens to the core of a high-mass star after it runs out of hydrogen? It shrinks and heats up. The core shrinks while the rest of the star expands. The main source of energy for a star as it grows in size to become a red giant is ______.
What happens when a star bigger than the sun’s core collapses?
The fate of the left-over core depends on its mass. If the left-over core is about 1.4 to 5 times the mass of our Sun, it will collapse into a neutron star. If the core is larger, it will collapse into a black hole. Only stars with more than 20 times the mass of the Sun will become black holes.
What is the life cycle of a massive star?
Step 1 – Green – A cloud of gas and dust collapses due to gravity, creating a protostar. Step 4 – Red – The star expands into a red giant when the star’s hydrogen level drops. Step 5 – Orange – Different fusion processes occur.
What happens to a high mass star once heavier elements are built up and that energy is released?
After the hydrogen in the star’s core is exhausted, the star can fuse helium to form progressively heavier elements, carbon and oxygen and so on, until iron and nickel are formed. Supernova explosions result when the cores of massive stars have exhausted their fuel supplies and burned everything into iron and nickel.
What occurs in a massive star to cause it to explode?
Having too much matter causes the star to explode, resulting in a supernova. 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. The core collapses, which results in the giant explosion of a supernova.
How much iron does it take to kill a star?
1 Answer. Phillip E. When the mass of iron in a star’s core reaches about 1.4 times the mass of the Sun, the star will effectively die.
What causes a high mass star to explode as a Type II supernova?
For a star to explode as a Type II supernova, it must be at several times more massive than the sun (estimates run from eight to 15 solar masses). Like the sun, it will eventually run out of hydrogen and then helium fuel at its core. However, it will have enough mass and pressure to fuse carbon.
How long does it take for a star to collapse?
So, how long does a supernova take to explode? A few million years for the star to die, less than a quarter of a second for its core to collapse, a few hours for the shockwave to reach the surface of the star, a few months to brighten, and then just few years to fade away.
What is left after a type 2 supernova?
Unlike SNIa where nothing remains after the explosion, SNII tend to form supernova remnants of ejected stellar material which surround either a neutron star or pulsar (if the core mass is less than about 3 solar masses), or a black hole.
What causes a high-mass star to go supernova quizlet?
The supernova occurs after fusion begins to pile up iron in the high-mass stars core. Because iron fusion cannot release energy, the core cannot hold off the crush of gravity for long. In the instant that gravity overcomes degeneracy pressure, the core collapse and the star explodes.
What happens when a high mass star undergoes a supernova?
A massive star will undergo a supernova explosion. If the remnant of the explosion is 1.4 to about 3 times as massive as our Sun, it will become a neutron star. The force of gravity overcomes the nuclear forces which keep protons and neutrons from combining. The core is thus swallowed by its own gravity.
What is the remnant after a high mass star dies quizlet?
What remains after a supernova explosion is called a supernova remnant. This is the star’s outer layers that were blasted into space during the supernova. The gases expand out from the star at incredible speeds and excite the gaseous atoms around it, causing it to glow as a nebula.
What happens when a star becomes a supernova quizlet?
The Star will continue to become more and more unstable which will cause a nuclear reaction in the core causing the Star to go Supernova. After a Supernova the star will become a Neutron Star, giving off very little light. If it is big enough the Star could collapse in on it self making it a Black Hole.
What kind of star is destined to die by supernova explosion quizlet?
A high-mass star dies in the cataclysmic explosion of a supernova, scattering newly produced elements into space and leaving a neutron star or a black hole behind. The supernova occurs after fusion begins to pile up iron in the high-mass star’s core.
How many days are left in the life of a star when it begins fusing silicon?
The silicon-burning sequence lasts about one day before being struck by the shock wave that was launched by the core collapse. Burning then becomes much more rapid at the elevated temperature and stops only when the rearrangement chain has been converted to nickel-56 or is stopped by supernova ejection and cooling.
What will happen when a star exhausts its remaining fuel?
What will happen when a star exhausts all its remaining fuel? The pressure of the nuclear reaction is not strong enough to equalise the force of gravity so the star collapses. A star that only has its core left, and they continue to burn as a white dwarf until they cool down and transform into a black dwarf.