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Neutron stars and pulsars violate the known laws of physics. The proposed density of neutrons in these stars by the standard model violates the Island of Stability in nuclear chemistry. Neutrons can not be packed together that densely without having them fly apart instantaneously.
Originally posted by Maslo
reply to post by mnemeth1
Neutron stars and pulsars violate the known laws of physics. The proposed density of neutrons in these stars by the standard model violates the Island of Stability in nuclear chemistry. Neutrons can not be packed together that densely without having them fly apart instantaneously.
But Island of stability does not take gravity into account. Wouldnt this attraction be enough to hold the neutron star together?
If I was in the center of a neutron star, how much would I weigh?
Originally posted by Maslo
reply to post by mnemeth1
If I was in the center of a neutron star, how much would I weigh?
In the center of neutron star, but also Earth, gravitational forces are balanced, so there is weightlesness. Of course, the pressure is extreme, because forces outside the center are not balanced, so all the weight is pushing on. What is your point?
My point is that I am not dumb enough to believe an object the size of an asteroid, that is made out of entirely hypothetical matter, is spinning around at the speed of light emitting a fine beam of energy in our general direction, which we are capable of detecting with normal radio telescopes.
If we say the matter of a neutron star is so dense that it has such a huge gravitational pull that it can over-come the island of stability, then the matter should oblate leaving the center hollow.
Originally posted by Maslo
What physical law makes this scenario impossible? What physical law prevents neutron star formation? Dont tell me its island of stability, because at such pressures (10exp11 times the earths gravity) even the most unstable nuclei are stabilised by analogue of "hydrostatic" pressure.
Gravity is the weakest force, but in contrast to other forces it can act on unlimited and macroscopic distances, is only additive and cannot be shielded. Therefore when we deal with large masses and high densities, it becomes the dominant force.
en.wikipedia.org...
What is your hypothesis to explain the observed then?
And what is ridiculous about black holes? They are inescapable consequence of known physical laws (gravity).edit on 20/10/10 by Maslo because: typos
Originally posted by mnemeth1
reply to post by Maslo
You know this idea that there is extreme pressure at the center of celestial objects is also unfounded. I don't see why this should be so.
Since we know that gravity is balanced at the center of a celestial object, we know that gravity arises from matter itself.
If we say the matter of a neutron star is so dense that it has such a huge gravitational pull that it can over-come the island of stability, then the matter should oblate leaving the center hollow.
Matter will attract to itself from all directions, inward as well as outward. The pressure would be greatest halfway down to the center if gravity is the force holding it all together.
No, not all matter is trying to pull towards the center. The center matter is trying to pull toward the outer matter.
Originally posted by Maslo
reply to post by mnemeth1
No, not all matter is trying to pull towards the center. The center matter is trying to pull toward the outer matter.
No, the center matter is not trying to pull anywhere. Thats what balanced forces mean. All the other matter is pulling towards the center, thus increasing pressure on the center matter. This is simple classical physics, high school level. And it makes perfect sense.
Lets illustrate an example with sand. Suppose our moon is made entirely out of loose sand. Now we scoop out the center leaving a few mile thick crust. Should the sand on the edge of the inner hollow sphere be attracted to the center or to the sand above it? Since there is no gravity at the center of the sphere, we know this is not the case. And since the distance is greater from the opposite side to the sand above it, yet the mass is identical, the sand will be most attracted to the sand above it.
Further, if we apply a high rate of spin, this will pin the sand to the inner walls of the sphere and actually create pressure outwards.
You're leaving out centripetal force.
Originally posted by nataylor
reply to post by mnemeth1
No pulsars with a rotational frequency above 716 Hz have been verified.
Originally posted by Maslo
The sand in this hollow cavity would actually not be attracted anywhere, it would be weightless. Thats because the forces exactly cancel out, no matter the mass or radius or wall thickness of the sphere.
Originally posted by Maslo
No I am not, because unless the centripetal force is high enough, the object would not desintegrate.
Let's take the centripetal force on a single neutron on the surface of neutron star with a 16-km radius, rotational frequency of 716 Hz, and a mass of 2 Solar masses. That would give us 5.4*10^-16 N of centripetal force. Now with what force would gravity be pulling that single neutron in? That would be 8.7*10^-16 N. As you can see, the pull of gravity is larger than the centripetal force.
Originally posted by mnemeth1
We are talking about spinning an object the size of an asteroid at near the speed of light.
Science doesn't work that way. Prove what you are saying with math. So far, what you are saying doesn't hold up.
Claiming gravity, which is one of the weakest forces in the universe, is capable of holding matter together as it rotates around at the speed of light is the most retarded theory I have ever heard in my life.