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Why prevents stars collapsing under the force of their own gravity?
The pressure of the fusing gasses
What keeps a star on the main sequence from collapsing?
Nuclear fusion produces heat, and heat creates the pressure which keeps the star from collapsing under its own gravity. The relationship between heat and pressure in a gas is described by the Ideal Gas Laws. It also applies to plasma (which can be described as a super heated gas).
What two factors cause a nebula to develop into a star?
The two main factors that cause a nebula to develop into a star are gravity and heat. Gravity pulls the gas and dust in the nebula together, causing it to collapse under its own gravity. As the collapse continues, the temperature and pressure in the core of the collapsing nebula increase, eventually reaching a point where nuclear fusion ignites, and a star is born.
A star that has collapsed under gravity?
A black hole
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
How are black hole different from neutron star?
A neutron star is an extremely dense object in which atoms have been crushed by gravity, causing electrons and protons to merge into neutrons. A force known as neutron degeneracy pressure prevents it from collapsing further. The neutron star can emit light and other forms of radiation. A black hole is an object that has completely collapsed under the force of gravity, with all mass coming to a single point called a singularity. The gravity is so strong that, within a certain radius nothing, not even light, can escape.
What prevents galaxies from collapsing under their own weight?
Their rotation.
How is the neutron star different from a black hole?
A neutron star is the remnant of a massive star. It consists of an extremely dense collection of neutrons that is prevented from collapsing further by neutron degeneracy pressure. While they have extremely strong gravity, neutron stars still emit light. A black hole is an object that has completely collapsed under the force of gravity, forming an infinitely dense singularity. Within certain radius, nothing, not even light escapes.
What is formed by a star that collapses under gravity to the point that its electrons and protons form neutrons?
A neutron star.neutron star
How are stars shaped?
A star is a massive, luminous ball of plasma held together by gravity. A star begins as a collapsing cloud of material composed primarily of hydrogen, along with helium and trace amounts of heavier elements. Once the stellar core is sufficiently dense, some of the hydrogen is steadily converted into helium through the process of nuclear fusion. The remainder of the star's interior carries energy away from the core through a combination of radiative and convective processes. The star's internal pressure prevents it from collapsing further under its own gravity.
What keeps a star on the main sequence from collapsing?
Nuclear fusion produces heat, and heat creates the pressure which keeps the star from collapsing under its own gravity. The relationship between heat and pressure in a gas is described by the Ideal Gas Laws. It also applies to plasma (which can be described as a super heated gas).
A what is formed by a star that collapses under gravity to the point that its electrons and protrons form neutrons?
Neutron Star. It collapses and splits its atoms apart. It's composed of only neutrons.
What keeps white dwarf from collapsing under its own weight?
A white dwarf star, as well as any other stable variety of star,is held together by the pressure popularly known as "gravity".In the opposite direction, white dwarf stars are kept from collapsing completely by degeneracy pressure. Specifically, for white dwarf stars, it's electron degeneracy pressure, which arises from the fact that electrons are fermions and cannot all occupy the same energy state. For higher mass stars, the force of gravity is able to overcome this and push all the electrons into the ground state, and the star is supported by a different kind of degeneracy ... neutron degeneracy, which is the same thing but with neutrons ... and you get a neutron star. At even higher masses, even that isn't sufficient and the star collapses all the way into a black hole.
What two factors cause a nebula to develop into a star?
The two main factors that cause a nebula to develop into a star are gravity and heat. Gravity pulls the gas and dust in the nebula together, causing it to collapse under its own gravity. As the collapse continues, the temperature and pressure in the core of the collapsing nebula increase, eventually reaching a point where nuclear fusion ignites, and a star is born.
Why are most galaxies formed like a disk?
A galaxy is formed when a nebula collapses under the force of gravity of the matter that it contains. The process of collapsing imparts a rotational momentum to the galaxy. It is this rotational motion which gives galaxies their characteristic disk shape.
How does tides are related to gravitational pull of the sun?
The sun resists collapsing under its own gravity by virtue of the continuous fusion reactions that generate all that heat and light. The reactions hold the whole thing up. An equilibrium has arisen between the force of gravity trying to pull everything in and the fusion trying to blow everything out and away.
