1 pulsar | Definition of pulsar

pulsar

noun
pul·​sar | \ ˈpÉ™l-ËŒsär How to pronounce pulsar (audio) \

Definition of pulsar

: a celestial source of pulsating electromagnetic radiation (such as radio waves) characterized by a short relatively constant interval (such as .033 second) between pulses that is held to be a rotating neutron star

Examples of pulsar in a Sentence

Recent Examples on the Web

There are multiverses and quantum dynamics, pulsars and hypothetical particles, as Panek unearths the uncommon wonder hiding behind common unintelligibility. Amelia Urry, Washington Post, "Scientists know gravity exists. They just don’t know how it works.," 16 Aug. 2019 For massive stars, that's usually a supernova that then creates a black hole or a pulsar. John Wenz, Popular Mechanics, "Scientists Think They've Found a Dead Planetary Core Orbiting a Dead Star," 4 Apr. 2019 The models point to a process called inverse Compton scattering, in which the pulsar’s magnetic field whips up electrons to energies far higher than achieved in particle accelerators on Earth. Dennis Normile, Science | AAAS, "Highest energy light ever seen traced to Crab Nebula," 8 July 2019 On subjects ranging from carcinogens in food to pigeons to pulsars, Van concluded, what was striking wasn’t so much what scientists already knew but the limitations of nature and science. Bob Goldsborough, chicagotribune.com, "Jon Van, longtime Tribune science writer, dies," 11 July 2019 The scientific hieroglyphic on them that resembles a burst of fireworks is actually a map of the frequencies of the thirteen nearest pulsars. Ann Druyan, National Geographic, "Dear Voyagers: How your billion-year journey carries true love," 10 July 2019 Astronomers can see pulsars only because electromagnetic radiation, especially radio waves, streams from their magnetic poles. Sarah Scoles, Discover Magazine, "Getting to Know Pulsars, the Lighthouses of the Cosmos," 12 June 2019 This pulsar moseys around just once every 23.5 seconds. Sarah Scoles, Discover Magazine, "Getting to Know Pulsars, the Lighthouses of the Cosmos," 12 June 2019 These pulsar systems let astronomers probe gravity on a new scale and with new precision. Quanta Magazine, "Troubled Times for Alternatives to Einstein’s Theory of Gravity," 30 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pulsar.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of pulsar

1968, in the meaning defined above

History and Etymology for pulsar

pulse + -ar (as in quasar)

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More Definitions for pulsar

pulsar

noun

English Language Learners Definition of pulsar

technical : a type of star that gives off a rapidly repeating series of radio waves

More from Merriam-Webster on pulsar

Rhyming Dictionary: Words that rhyme with pulsar

Spanish Central: Translation of pulsar

Britannica.com: Encyclopedia article about pulsar