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
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These transients have brightnesses in between that of classical novas, triggered when a white dwarf hoards material from a companion star thus sparking a runaway nuclear explosion, and supernovas that mark the death of a massive star and the birth of a black hole or a neutron star.
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Robert Lea, Space.com, 22 Jan. 2026
The culprit was a magnetar, a super-magnetized neutron star located about 50,000 light-years away.
—Phil Plait, Scientific American, 22 Jan. 2026
What is a neutron star, or pulsar?
—Adam Harrington, CBS News, 23 Dec. 2025
In the first scenario, a quickly spinning star goes supernova before fissioning into two, sub-solar neutron stars.
—Andrew Paul, Popular Science, 17 Dec. 2025
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Robert Lea, Space.com, 22 Jan. 2026
The culprit was a magnetar, a super-magnetized neutron star located about 50,000 light-years away.
—Phil Plait, Scientific American, 22 Jan. 2026
What is a neutron star, or pulsar?
—Adam Harrington, CBS News, 23 Dec. 2025
In the first scenario, a quickly spinning star goes supernova before fissioning into two, sub-solar neutron stars.
—Andrew Paul, Popular Science, 17 Dec. 2025
See All Example Sentences for neutron star
Cite this Entry
“Neutron star.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/neutron%20star. Accessed 31 Jan. 2026.
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