neutron+stars

type of remnant(compressed core) that can result from the gravitational collapse of a massive star during a Type II, Type Ib or Type Ic supernova event made almost entirely of neutrons which have almost 0 electrical charge and roughly the same mass as a proton

extremely hot prevented from collapsing by the Pauli exclusion Principle which states: no two neutrons can occupy the same quantum state at the same time. if over five solar units, will ultimately collapse and create a black hole.

A typical neutron star has a mass between 1.35 and about 2.1 solar masses, with a corresponding radius of about 12 km Suns radius is 60,000 times larger.

EXTREMELY DENSE -denser in core than on solid surface -One measure of such immense gravity is the fact that neutron stars have an escape velocity of around 100,000 km/s, about 33% of the speed of light. Matter falling onto the surface of a neutron star would be accelerated to tremendous speed by the star's gravity. The force of impact would likely destroy the object's component atoms, rendering all its matter identical, in most respects, to the rest of the star

The "atmosphere" of the star is roughly one meter thick, and its dynamic is fully controled by the stars magnetic field. Below the atmosphere one encounters a solid "crust". This crust is extremely hard and very smooth (with maximum surface irregularities of ~5 mm), because of the extreme gravitational field

solid core if below 6,000,000 kelvin

Neutron stars rotate extremely rapidly after their creation due to the conservation of angular momentum; like a spinning ice skater pulling in their arms, the slow rotation of the original star's core speeds up as it shrinks. A newborn neutron star can rotate several times a second; sometimes, when they orbit a companion star and are able to accrete matter from it, they can increase this to several hundred times per second, distorting into an oblate spheroid shape despite their own immense gravity (an equatorial bulge).

2000 known neutron stars in the Milky Way and the Magellanic Clouds