A neutron star has so much gravity because it is the remnant core of a collapsed star. During the collapse, the star's mass becomes compressed into a tiny volume, resulting in an extremely high density. This high density leads to a strong gravitational force, which gives neutron stars their immense gravitational pull.

black hole

All young neutron stars spin rapidly.

You might be confused with a pulsar.

See related questions.

It all relates to what you define as big.

A black hole is an infinite region in space with an infinite density. It's "event horizon" is not infinite.

If you wish to categorise between size of a neutron star and a black hole's "event horizon", then a black hole is, in most cases larger - but there are micro black holes, which exhibit all the characteristics of a black hole but have a much smaller "event horizon".

In the physical sense, everything is bigger than a black hole, but in a terminological sense (the event horizon) it would depend on the mass of the black hole.

Nobody knows for sure, but billions of years. It would also depend on when the neutron star, no longer becomes a star. Is it when it stops radiating heat, or x-rays? The star or the remains will continue to be a physical property but will no longer radiate any energy.

The collapse of a star is based on its age. When it runs out of "Fuel" its inside contracts as the outside expands. it can then super nova or collapse into a tiny star.

That would be called a "pulsar".

See related question

The black hole is infinitely more dense than a neutron star. The neutron star is something like the mass of upto 2.3 suns compressed into a ball a dozen or so kilometers in diameter. That makes the neutron star about as dense as the nucleus of an atom. Really dense stuff. Like a couple of million pounds per cubic inch, maybe. The density of the neutron star varies from "less" near the surface to many times "more" near the center. But the black hole has infinite density. That makes it infinitely more dense than a neutron star. A teaspoon of neuton star has more mass than the entire human population

Br is the atom with the smallest. K+ is the ion with the smallest radius. In general, the shape with the smallest radius has the smallest diameter

All young neutron stars in reality are "pulsars".

However, for a neutron star to be termed a pulsar, it's magnetic axis has to point towards Earth. (So we can see the pulse, even though all young neutron stars have a pulse, they cannot be observed from Earth.)

Everything, they are one and the same.

See related question for an explanation.

The very definition of a black hole is a stellar body dense enough to have an escape velocity greater than that of light -- in other words, light that comes close enough to its event horizon will be trapped around it forever. If a star dies and it has enough mass to be compressed to a high-enough mass-to-radius-squared ratio to have such a high escape velocity, then a black hole will result. Otherwise, it will become a neutron star -- extremely dense, to be sure, but not dense enough to trap light, and therefore not as dense as a black hole.

Neutron stars range in mass from 1.35 Solar masses (2.69e+30 kg) to 2.40 Solar masses (4.16e+30 kg).

Any smaller, and electrorepulsive forces will not allow the object to attain this stage (it would be a white dwarf instead), and any heavier, and the neutron star will collapse further into a black hole. This is called Schandraskar's limit a star must be at least 3 solar masses to be a candidate for a black hole however according to the Tolman, Oppenheimer, Volkov limits and star over 5 solar masses must become a black hole

The gravitational force that a black hole has on another object depends on the following:

1. The mass of the black hole

2. The mass of the object

3. The distance between the centres of the black hole and the object (r)

Using Newton's Law of Universal Gravitation, this force can be calculated using the following equation:

F=G*[(m1*m2)/(r2)]

where:

F = force

G = universal gravitational constant = 6.674

It would not exist. A neutron star is what it is by virtue of the mass of the whole star. Extracting just a pinhead would revert that matter back to normal matter.

For the sake of density - as weight has nothing to do with matter outside of a gravitational body.

The denisty of a pinhead of neutron star would be the equivalant of about 100 times the mass of the Great Pyramid of Giza

the simple reson is mass.......that is if the star under consideration is a heavy one, it is more likely to turn into a black hole and if it is comparatively smaller it is prone to turn into a neutron star or a white dwarf

No. A black hole is in some ways just a very compact neutron star; if a normal neutron star was able to implode that far, it would have done so and become a black hole already.

There is a simple law of physics called the Pauli Exclusion Principle which states that no two neutrons can occupy the same quantum state simultaneously this prevents further collapse of neutron stars.

Pulsars and neutron stars emit a beam of electromagnetic radiation.

Evidence suggests that all Neutron stars are pulsars or were once pulsars. In theoretical physics; the existence of objects like quark stars, preon stars, or electroweak stars is called into question. These are usually used to explain radio quiet neutron stars; however, far more likely these objects simply do not pulse at any rate in our relative direction.

A pulsar is a special kind of neutron star, which is the ultra-dense leftover core of a massive star. Pulsars emit beams of radiation that sweep out in circles as the pulsar spins. When those beams flash over Earth, we see them as regular, repeating pulses of radio emission.

Generally, the bigger the star, the bigger the result after it's death. It is important to know all of the stages after a star's death. The size of a star, I think, is called solar mass. When a star does not have a sufficient amount of fuel to keep it's temperature at a certain point, to suppress it's own gravity, it's gravity will begin to collapse in on itself, commonly known as gravitational collapse. This is where the star is going to collapse in on itself, getting rid of it's gases, but leaves a small, burning core. Only with black holes does the star completely collapse in on itself, I think. A small star, let us take our own star for example, will collapse in on itself and become a small, white dwarf. White dwarfs are small stars that burn for billions of years. I think you get a white dwarf from the death of a star that was only about 1 solar mass. You then get bigger stars which can eventually become neutron stars. This is where a bigger star only leaves neutrons basically in the core, thus making it a neutron star. Finally you get black holes. Black holes are formed by a star of about 30-40 solar masses or more. In other words, a HUGE star. The sheer size of the star means it sheds it's envelope, (outer layer basically) extremely quickly, but because the mass is so high the opposing force is not nearly as strong to counter-balance the collapse, as opposed to a white dwarf, or neutron star formation. The collapse continues and continues until it digs a hole in through itself, and with the density so high it reaches a singularity point. This is a black hole. There you have it, three rough descriptions of the stages after a star's death. I know they sound confusing, they're probably not even accurate but my knowledge on star's is pretty rusty anyway. I hope this has helped in some way.

When a supernova becomes massive enough, it's own gravitational pull will pull it together, and it becomes a neutron star. A neutron is when the electrons in the atoms get pushed against the nucleus because the gravitational pull is so strong. A neutron star becomes a black hole when the individual particles (the electrons, neutrons, and protons) collapse into themselves.

A pulsar is a neutron star that rotates and sends a beam of electromagnetic radiation. This is known because only a very dense source of such radiation would be capable of rotating that quickly without disintegrating.

When a neutron star is "born" [See related question], it emits a steady beam of electromagnetic radiation. When this beam is directed towards Earth it is called a Pulsar. [See related question]

See related link for a pictorial of the beam.

If the beam is not directed towards Earth, then it is only observed as a neutron star because we cannot detect the electromagnetic radiation beam.

As a neutron star slowly ages (10 -> 100 million years), this beam slowly "switches" off and the pulsar is no more.

So all neutron stars in their early stage, emit a steady beam of electromagnetic radiation, but it's only called a pulsar if it's directed towards Earth.

Neutron stars are very small, about the size of a small city, which means they have a much smaller surface area from which to emit light than other stars. So even if the amount of light per square meter ies greater than that of an ordinary star, the total amount of light emitted is smaller.