英和和英

語源

Blend of pulsating +‎ (radio) star, patterned after quasar. Coined by British astronomers Antony Hewish and Jocelyn Bell in 1968, and first used in print in The Daily Telegraph. By surface analysis, pulse +‎ -ar

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名詞

pulsar (plural pulsars)

1. (astronomy) A rotating neutron star that emits radio pulses periodically.
   • 2023 August 30, Ashley Strickland, “Astronomers solve the puzzle of an unusual pulsing dead star”, in CNN‎:

     Rapidly rotating dead stars, pulsars are so named because as they spin, they release beams of electromagnetic radiation across space that appear to pulse like celestial lighthouses.
     But a pulsar called PSR J1023+0038, located about 4,500 light-years away from Earth in the Sextans constellation, is even more unusual in that some of the pulses are brighter than others, almost like it’s switching between different modes.

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参考

Further reading

• pulsar on Wikipedia.Wikipedia
• “pulsar”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.
• “pulsar”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.