How does something collapse on itself?

How does something collapse on itself?

In collapsed stars, matter has been pushed to the limit. Internal pressures produced by nuclear power production in the centers of stars are no longer important, because the nuclear fuel has been exhausted. When those nuclear reactions stop producing energy, the pressure drops and the star falls in on itself.

How does something collapse under its own gravity?

Gravitational collapse is the contraction of an astronomical object due to the influence of its own gravity, which tends to draw matter inward toward the centre of gravity. A star is born through the gradual gravitational collapse of a cloud of interstellar matter.

Why is the universe not a black hole?

A homogeneous space cannot have a boundary, so there can be no event horizon. And the future behavior of light rays cannot depend on their directions in an isotropic space. Thus, a homogeneous and isotropic universe is not a black hole. The universe does have one similarity to a black hole: light cannot escape from it.

Is it possible for the universe to collapse?

Although the new calculations predict that a collapse is now more likely than ever before, it is actually also possible, that it will not happen at all. It is a prerequisite for the phase change that the universe consists of the elementary particles that we know today, including the Higgs particle.

Will the Higgs cause the collapse of the universe?

A collapse of the universe will happen if a bubble forms in the universe where the Higgs particle-associated Higgs-field will reach a different value than the rest of the universe. If this new value means lower energy, and if the bubble is large enough, the bubble will expand at the speed of light in all directions.

What happens to a cloud when it collapses?

As a ball of gas collapses, its gravitational potential energy changes. Half of this change is radiated away, the other half heats up the collapsing cloud. So the very central portions of the cloud are getting denser and hotter. Eventually the density and temperature will become high enough that nuclear reactions will begin to take place.

What happens when a star’s spin axis collapses?

So as the cloud collapses, material along the spin axis can collapse onto the star, but material in the spin plane has collapse halted by centripetal force. A disk is formed!