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
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For the neutron stars to precisely fit the signal from the simulations, there would have to be more of these neutron stars than have been observed in real observations. Chris Young, Interesting Engineering, 16 Oct. 2025 When their cores run out of fuel, gravity crushes them inward, triggering supernovae that leave behind a neutron star or black hole. Sharmila Kuthunur, Space.com, 8 Oct. 2025 White dwarfs will cool to become black dwarfs after about 1014 years or so, and the even smaller neutron stars will cease to emit visible light after around 1015-1016 years. Ethan Siegel, Big Think, 3 Oct. 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 See All Example Sentences for neutron star

Word History

First Known Use

1934, in the meaning defined above

Time Traveler
The first known use of neutron star was in 1934

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Cite this Entry

“Neutron star.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/neutron%20star. Accessed 29 Oct. 2025.

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

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