Neutron star ... A neutron star is the gravitationally collapsed core of a massive supergiant star. It results from the supernova explosion of a massive star —combined with gravitational collapse —that …

Jan 4, 2026 · Neutron star, any of a class of extremely dense, compact stars thought to be composed primarily of neutrons. Neutron stars are typically about 20 km (12 miles) in diameter. Their masses …

May 24, 2023 · Neutron stars are the remains of the cores of massive stars that have reached the end of their lives. They are one of the two possible evolutionary endpoints of the most massive stars, the …

Dec 24, 2025 · Neutron stars explained through stellar remnants and collapsed stars, revealing extreme density, gravity, magnetism, and cosmic collisions.

Mar 28, 2023 · When a massive star explodes as a supernova at the end of its life, its core can collapse into a tiny and superdense object with not much more than our sun’s mass. These small, incredibly …

Dec 27, 2023 · The neutrinos can zip out of the star freely, but the neutrons are crushed closer together until they exert their own gravity-fighting degeneracy pressure, creating a neutron star.

Sep 23, 2021 · Neutron stars are formed when a massive star runs out of fuel and collapses. The very central region of the star – the core – collapses, crushing together every proton and electron into a …

Learn what neutron stars and pulsars are, how they form, emit signals, and test gravity, with insights from GW170817, NICER, magnetars, and pulsar timing.

From the fiery death of a massive star to the birth of one of the densest objects in the universe, neutron stars are nature’s way of showing off. Neutron stars are a window into the universe’s secrets. They …

A neutron star is the collapsed core of a massive supergiant star. It results from the supernova explosion of a massive star—combined with gravitational collapse —that compresses the core past white dwarf …