In nuclear physics, "magic numbers" identify specific numbers of protons or neutrons that lead to especially stable nuclei.

Rutherford also put out the idea that there could be a particle with mass but no charge. He called it a neutron, and imagined it as a paired proton and electron.

Fifty experts on nuclear physics, particle physics and astrophysics met at CERN from 9 to 13 June to discuss how to use ...

Recent theoretical and experimental advances provide new insights into how mass is distributed within particles like protons, neutrons, and pions, offering critical guidance for future research ...

My observation, a useful table here showing the particle, mass in kg, radius in meters, and charge in coulombs. The radius of the proton is 0.83 x 10^–15 m, the radius of the electron is 10 ...

The neutron star, known as PSR J0952-0607, was discovered in 2017 about 3,000 light-years from Earth in the constellation Sextans. Recent measurements show the star weighs 2.35 times as much as ...

Gravitational-wave observations provided nearly 200 measurements of compact-object masses like neutron stars and black holes, but only once before has a signal been found from a mass-gap object, ...

Small but Mighty. Despite their small diameters—about 12.5 miles (20 kilometers)—neutron stars boast nearly 1.5 times the mass of our sun, and are thus incredibly dense.

Astronomers have spied the heaviest neutron star to date 3,000 light-years away from Earth. The “black widow,” a dense, collapsed star that’s devouring its stellar companion, also spins 707 ...

The ‘mass gap’, spanning roughly three to five solar masses, was thought to separate two types of cosmic ‘compact objects’: neutron stars and black holes. However, this observation, termed GW230529, ...