the dominant force resisting gravity in the sun is simple gas pressure. however, this would not be sufficient were it not for the energy being released by the nuclear reactions in the core of the sun. the energy released in the core pushes the material outwards a little as it escapes, providing just enough additional outward pressure to balance gravity and hold the star in equilibrium.
Even though the Sun is much larger and more massive than the Earth, it's so far away that its gravity is comparatively weaker than the Earth's. After all, you're standing directly on the Earth and the Sun is 150,000,000 km away (give or take a few).
Gravity decreases with the square of the distance between any 2 objects. That means that if you move the objects twice as far apart as they were before, the gravitational pull between them is only 1/4 as strong; if you move them 10 times as far gravity drops to 1/100 of the original force.
There is the small matter of the continuous nuclear fusion in its core ... like millions of
hydrogen bombs exploding continuously and simultaneously ... that provides force in
the outward direction.
It isn't that strong. In any case, it also pulls the Earth.
It isn't that strong. In any case, it also pulls the Earth.
It isn't that strong. In any case, it also pulls the Earth.
It isn't that strong. In any case, it also pulls the Earth.
Because even though the sun's gravity is much stronger than Earth's overall, Earth's gravity is stronger on Earth's surface and in space around Earth because Earth is 93 million miles from the sun.
It's doing both, all the time. A star exists in a delicate balance; the nuclear fusion process going in within the core of the Sun is equivalent to millions of nuclear bombs going off every second, while the mass of the Sun produces such intense gravity that the Sun is constantly being crushed. The expansive force of fusion exactly equals the compressive force of gravity.
Because the temperature of the core keeps the Sun in hydrostatic equilibrium.
See related question.
Because the Earth's gravity is strong enough to keep you on, and the sun only keeps the Earth in orbit.
Because the force of gravity is diluted by distance. We are far enough from the Sun that it can't just pull you off the Earth.
The tremendous outward pressure of the energy generated at it's core balances the gravitational force exactly. It is known as "hydrostatic equilibrium".
See related question.
Yes. Stars form when clouds of gas and dust, called nebulae, collapse under the force of gravity.
Stars do not collapse because the inward force of gravity is balanced by the pressure generated by fusion. When stars die they do collapse. The cores of low to medium mass stars collapse to form white dwarfs. Further collapse is prevented y electron degeneracy pressure. More massive stars leave behind neutron stars, in which gravity is balanced by neutron degeneracy pressure. In the most massive stars, once fusion stops producing energy there is nothing to stop the collapse and the core becomes a black hole.
Gravity and Resistance Under free fall, the only force acting upon an object is the force of gravity. But realistically, there is also the force of friction from the air (Air Resistance) that opposes the force of gravity.
The pressure of the fusing gasses
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.
Yes. Stars form when clouds of gas and dust, called nebulae, collapse under the force of gravity.
Simple cooling of the ash and debris column, followed by collapse under gravity.
Weight them under gravity or calculate from momentum of impact or spring load under centripetal force in space. Then refer the weight or the force to the gravity of earth at 9.81m/s2 and account for its' weight under earth gravity.
Stars do not collapse because the inward force of gravity is balanced by the pressure generated by fusion. When stars die they do collapse. The cores of low to medium mass stars collapse to form white dwarfs. Further collapse is prevented y electron degeneracy pressure. More massive stars leave behind neutron stars, in which gravity is balanced by neutron degeneracy pressure. In the most massive stars, once fusion stops producing energy there is nothing to stop the collapse and the core becomes a black hole.
Gravitational force.
Its true.
The force that is applied by gravity on a moving body, especially under extreme accelaration.
gravitational force of attraction/gravity -- force -- weight -- centripetal force, under some circumstances
no it will pop it will get the force that gravity pulls on it will have cows
ellipses, parabolas, or hyperbolas. :)
Gravity is the driving force behind:- wind (convection currents can only happen in a gravity field) ice (Ice moves and erodes under the pull of the force of gravity) Landslides (here the motive power is the pull of gravity)
There is no net force in free fall so force is zero