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A supernova is caused the the fusion of (in most cases helium) molecules in iron. Once you reach iron, you can't use fusion. Thus, the star can't produce the energy to keep it stable and gravity causes it to collapse.
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∙ 7y ago
Wiki User
∙ 7y agoGravity.
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Why prevents stars collapsing under the force of their own gravity?
The pressure of the fusing gasses
Where does the stars originate?
All stars originate in (collapsing) gas clouds - consisting mainly of hydrogen - and usually in large groups (hundreds to thousands of stars forming together).
In what ways is the evolution of a massive star similar to the evolution of the sun?
Gravity is what causes dust to gather to make stars and planets. ANswer All stars start out as swirling clouds of elements (mainly hydrogen and helium), called nebulae. This occurs whether a small star like the sun or a very massive star like Betelgeuse or Sirius is formed. In the core of little spherical pockets (protostars which become the stars eventually), nucleosynthesis begins. This occurs in all stars, converting hydrogen to helium and all elements up to iron (atomic number 26). Once nucleosynthesis commences, protostars become known as stars. But, as Marcus Chown is so fond of 'subtleties' in his book Quantum Theory cannot hurt you, here is a subtlety to understand here. Stars, however large or small, have great weight crushing the star into a tiny pinprick by gravity. Obviously the larger the star the greater the weight and the more massive the crushing force. There is a balance however; the heat generated from nucleosynthesis keeps the star rotund and noncollapsing. But with the greater crushing force of the larger stars, heat has to be generated all the faster. So stars, start off similar from nebulae, whether large or small like the sun. But their mass determines their fates in the end.
How do stars keep their spherical shape?
Gravitational Force
Did gravity form stars?
Yes. Stars form when clouds of gas and dust, called nebulae, collapse under the force of gravity.
Why prevents stars collapsing under the force of their own gravity?
The pressure of the fusing gasses
What are the release dates for Cultivision - Collapsing Stars 2002?
Cultivision - Collapsing Stars 2002 was released on: USA: 18 September 2002 (New York International Independent Film and Video Festival)
How are stars made with no gravity?
They aren't. Stars form as a result of a cloud of gas collapsing due to gravity.
What force is responsible for holding the stars gases and dust together in a galaxy?
The answer is simple: gravity.
What force makes the nucleus push itself apart?
There is the strong nuclear force that keeps the nucleus together, but then there is also the weak nuclear force that is responsible for the radioactive decay and is responsible for the fusion of hydrogen in stars. There is also the electromagnetic force that combats the strong force and attempts to push the nucleus apart, this is, however, unsuccessful.
How did the first Black hole appear?
Like all the others - Superdense stars collapsing.
Why did the nebula's condense to form the sun?
If the nebula is gravitationally unstable, it collapsing & forming stars!
Where does the stars originate?
All stars originate in (collapsing) gas clouds - consisting mainly of hydrogen - and usually in large groups (hundreds to thousands of stars forming together).
What force do scientist think was responsible for clumping together to form the first stars after the Big bang?
Many scientists think, several believe, and others conjecture, that it was the force of gravity.
What force is partially responsible for the formation of the solar system the movement of an object in your solar system and holds together stars and galaxies?
Gravity.
Inside a star the force of gravity is balanced by?
If the force of gravity crushing a star in weren't balanced, it would collapse. The outward-pushing force counteracting gravity is the energy produced in nuclear fusion, when the heat and pressure inside of stars smashes atoms together.
What color is a stellar nursery?
alot of different colors; it looks like a galaxy and has stars; stars form in a nebula, from collapsing clouds of interstellar gas and dust
