neutron star

noun

: a dense celestial object that consists primarily of closely packed neutrons and that results from the collapse of a much larger stellar body

Examples of neutron star in a Sentence

Recent Examples on the Web

Pulsars are neutron stars — the ultradense leftover cores of long-dead stars — that spin rapidly and emit radiation at regular intervals. —Paul Sutter, Space.com, 28 July 2025

Signals from scattering black holes and neutron stars should be within reach of the next generation of gravitational-wave detectors that are set to come online in the late 2030s. —Ramin Skibba, Scientific American, 13 May 2025

Things are relatively quiet for the moment aboard Enterprise, which is currently studying a neutron star. —Keith Phipps, Vulture, 31 July 2025

While physicists have a somewhat decent understanding of what nuclear material does at the densities found in the outermost layers, the cores of neutron stars remain complete mysteries. —Paul Sutter, Space.com, 28 July 2025

Word History

First Known Use

1934, in the meaning defined above

Rhymes for neutron star

• abattoir
• alcazar
• autocar
• avatar
• belshazzar
• caviar
• caviare
• cinnabar
• commissar
• condylar
• deodar
• handlebar

Kids Definition

neutron star

noun

: a very dense object in space that consists of closely packed neutrons and is produced by the collapse of a much larger star