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

Normally, neutrons are bound within atomic nuclei or in the matter making up extraordinarily powerful stars called neutron stars. —Charles Q. Choi, Space.com, 7 Apr. 2025

The findings, published in the same issue of Nature, provide additional support that a neutron star created the fast radio burst. —Ashley Strickland, CNN, 24 Jan. 2025

That year observations of a merging neutron star revealed that gravitational waves and electromagnetic waves arrived at Earth within three seconds of each other—after traversing a distance of 130 million light-years. —Paul M. Sutter, Scientific American, 26 Feb. 2025

The dense core that is left over is known as a neutron star. —Joshua Rapp Learn, Discover Magazine, 25 Feb. 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