Most ordinary matter is held together by an invisible subatomic glue known as the strong nuclear force—one of the four fundamental forces in nature, along with gravity, electromagnetism, and the weak force. The strong nuclear force is responsible for the push and pull between protons and neutrons in an atom’s nucleus, which keeps an atom from collapsing in on itself.
Click here for original story, Study identifies a transition in the strong nuclear force that illuminates the structure of a neutron star’s core
Source: Phys.org