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词汇 blazar
释义

Definition of blazar in English:

blazar

noun ˈbleɪzɑːˈbleɪˌzɑr
Astronomy
  • A type of quasar that is an intense, irregularly variable source of highly polarized light, thought to arise from a plasma jet pointing in the direction of the earth.

    at the blazar's heart is a supersized black hole with a mass millions to billions of times that of the sun
    Example sentencesExamples
    • To match the amount of energy given off by a typical blazar in one second, the sun must shine for 317,000 years.
    • In early April, the blazar Markarian 421 had an episode of extreme activity, brightening by more than 50 times its typical level.
    • These blazars emit gamma rays, but not all of them reach Earth.
    • In this study, the researchers focused on distinctive galaxies called blazars, which are several billion light years away.
    • What makes a blazar so bright is that one of these particle jets happens to be aimed almost straight at us.

Origin

1980s: from blaze1, on the pattern of quasar, with bl- echoing the name BL Lac object.

Definition of blazar in US English:

blazar

nounˈblāˌzärˈbleɪˌzɑr
Astronomy
  • A type of quasar that is an intense, irregularly variable source of highly polarized light, thought to arise from a plasma jet pointing in the direction of the earth.

    at the blazar's heart is a supersized black hole with a mass millions to billions of times that of the sun
    Example sentencesExamples
    • What makes a blazar so bright is that one of these particle jets happens to be aimed almost straight at us.
    • In early April, the blazar Markarian 421 had an episode of extreme activity, brightening by more than 50 times its typical level.
    • To match the amount of energy given off by a typical blazar in one second, the sun must shine for 317,000 years.
    • These blazars emit gamma rays, but not all of them reach Earth.
    • In this study, the researchers focused on distinctive galaxies called blazars, which are several billion light years away.

Origin

1980s: from blaze, on the pattern of quasar, with bl- echoing the name BL Lac object.

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