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

The revelation demonstrates another way in which black holes and neutron stars push the laws of physics, and casts doubt on assumptions regarding the formation and evolution of these mixed binary systems. —Robert Lea, Space.com, 11 Mar. 2026

These are the weirdest chunks of matter in the cosmos—a teaspoon of their material weighs as much as Mount Everest—making neutron stars the sites of some of the most extreme physics out there. —Joseph Howlett, Scientific American, 11 Mar. 2026

On even longer timescales, the remnant black holes that were created, whether from stellar explosions, neutron star mergers, a collapsing gas cloud, or having grown into supermassive behemoths, will all evaporate. —Big Think, 20 Feb. 2026

Recently, simulations on a NASA supercomputer gave scientists an idea of how neutron stars' magnetic fields intertwine and change dramatically before the stars crash and merge. —Adam Harrington, CBS News, 9 Feb. 2026

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