释义 |
Definition of parsec in English: parsecnoun ˈpɑːsɛkˈpɑrsɛk A unit of distance used in astronomy, equal to about 3.26 light years (3.086 × 10¹³ kilometres). One parsec corresponds to the distance at which the mean radius of the earth's orbit subtends an angle of one second of arc. Example sentencesExamples - But cosmologists are so comfortable with millions and billions that none of them feel the urge to invent a unit much beyond the light-year or the parsec.
- The fact remained that the Rage fleet was within a parsec of Nova.
- For reference, one parsec is around three light years.
- I mean, all the ones that I've looked at so far are within 100 parsecs of 300 light years of the Sun.
- Their absolute magnitude is that of their appearance at 10 parsecs, or 32.6 light-years.
Origin Early 20th century: blend of parallax and second2. Definition of parsec in US English: parsec(also pc) nounˈpɑrsɛkˈpärsek A unit of distance used in astronomy, equal to about 3.26 light years (3.086 × 10¹³ kilometers). One parsec corresponds to the distance at which the mean radius of the earth's orbit subtends an angle of one second of arc. Example sentencesExamples - The fact remained that the Rage fleet was within a parsec of Nova.
- But cosmologists are so comfortable with millions and billions that none of them feel the urge to invent a unit much beyond the light-year or the parsec.
- For reference, one parsec is around three light years.
- Their absolute magnitude is that of their appearance at 10 parsecs, or 32.6 light-years.
- I mean, all the ones that I've looked at so far are within 100 parsecs of 300 light years of the Sun.
Origin Early 20th century: blend of parallax and second. |