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

Launched in 2021, IXPE is NASA's first mission designed to detect polarized X-rays, with the spacecraft having studied some of the universe's most extreme objects and events, such as neutron stars, black holes, and supernovae. —Robert Lea, Space.com, 21 Nov. 2025

Over the coming weeks, light began to arrive in other wavelengths as well, as close to 100 professional observatories monitored the spectacular afterglow of this neutron star merger. —Big Think, 13 Nov. 2025

In the 10 years since then, scientists have detected hundreds of black holes coming together, as well as other extreme cosmic events like neutron stars colliding and black holes merging with a neutron star. —Nell Greenfieldboyce, NPR, 11 Sep. 2025

Among these new discoveries is a neutron star–black hole merger. —Chad Hanna, The Conversation, 10 Sep. 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