Dyson, F. W. (March 1913). «The distribution in space of the stars in Carrington's Circumpolar Catalogue». Monthly Notices of the Royal Astronomical Society73 (5): 342. Bibcode:1913MNRAS..73..334D. doi:10.1093/mnras/73.5.334. «[paragraph 14, page 342] Taking the unit of distance R* to be that corresponding to a parallax of 1″·0 [… Footnote:] * There is need for a name for this unit of distance. Mr. Charlier has suggested Siriometer, but if the violence to the Greek language can be overlooked, the word Astron might be adopted. Professor Turner suggests Parsec, which may be taken as an abbreviated form of "a distance corresponding to a parallax of one second".»
Dyson, F. W. (March 1913). «The distribution in space of the stars in Carrington's Circumpolar Catalogue». Monthly Notices of the Royal Astronomical Society73 (5): 342. Bibcode:1913MNRAS..73..334D. doi:10.1093/mnras/73.5.334. «[paragraph 14, page 342] Taking the unit of distance R* to be that corresponding to a parallax of 1″·0 [… Footnote:] * There is need for a name for this unit of distance. Mr. Charlier has suggested Siriometer, but if the violence to the Greek language can be overlooked, the word Astron might be adopted. Professor Turner suggests Parsec, which may be taken as an abbreviated form of "a distance corresponding to a parallax of one second".»
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Dyson, F. W. (March 1913). «The distribution in space of the stars in Carrington's Circumpolar Catalogue». Monthly Notices of the Royal Astronomical Society73 (5): 342. Bibcode:1913MNRAS..73..334D. doi:10.1093/mnras/73.5.334. «[paragraph 14, page 342] Taking the unit of distance R* to be that corresponding to a parallax of 1″·0 [… Footnote:] * There is need for a name for this unit of distance. Mr. Charlier has suggested Siriometer, but if the violence to the Greek language can be overlooked, the word Astron might be adopted. Professor Turner suggests Parsec, which may be taken as an abbreviated form of "a distance corresponding to a parallax of one second".»
Dyson, F. W. (March 1913). «The distribution in space of the stars in Carrington's Circumpolar Catalogue». Monthly Notices of the Royal Astronomical Society73 (5): 342. Bibcode:1913MNRAS..73..334D. doi:10.1093/mnras/73.5.334. «[paragraph 14, page 342] Taking the unit of distance R* to be that corresponding to a parallax of 1″·0 [… Footnote:] * There is need for a name for this unit of distance. Mr. Charlier has suggested Siriometer, but if the violence to the Greek language can be overlooked, the word Astron might be adopted. Professor Turner suggests Parsec, which may be taken as an abbreviated form of "a distance corresponding to a parallax of one second".»
High Energy Astrophysics Science Archive Research Center (HEASARC). «Deriving the Parallax Formula». NASA's Imagine the Universe!. Astrophysics Science Division (ASD) en el Goddard Space Flight Center. Consultado el 26 de noviembre de 2011.