janskyn.

/ˈdʒanski/

Forms: Also with capital initial.

Etymology: < the name of Karl G. Jansky (1905–50), U.S. radio engineer.

Astronomy.

A unit of electromagnetic flux density used in radio astronomy, equal to 10⁻²⁶ watts per square metre per hertz. Symbol Jy (see J n. Initialisms).

ΘΚΠ

the world > the universe > cosmology > astronomy > [noun] > radio astronomy > unit used in

jansky1966

Jy1974

1966 J. D. Kraus Radio Astron. iii. 66 The name jansky (abbreviated jan), after the pioneer radio astronomer Karl G. Jansky, has been proposed for this unit.

1975 Internat. Astron. Union Information Bull. Jan. 7 Commission 40 resolved that the name ‘Jansky’, abbreviated ‘Jy’, be adopted as the unit of flux density in radio astronomy.

1979 Sky & Telescope Feb. 134/2 As the star rose above the horizon, he found that it was emitting at 0.5 jansky.

1985 Times 23 Jan. 16/6 A strong radio source would provide a signal of several hundred janskys.

This entry has not yet been fully updated (first published 1993; most recently modified version published online June 2018).

单词	jansky
释义	janskyn. /ˈdʒanski/ Forms: Also with capital initial. Etymology: < the name of Karl G. Jansky (1905–50), U.S. radio engineer. Astronomy. A unit of electromagnetic flux density used in radio astronomy, equal to 10⁻²⁶ watts per square metre per hertz. Symbol Jy (see J n. Initialisms). ΘΚΠ the world > the universe > cosmology > astronomy > [noun] > radio astronomy > unit used in jansky1966 Jy1974 1966 J. D. Kraus Radio Astron. iii. 66 The name jansky (abbreviated jan), after the pioneer radio astronomer Karl G. Jansky, has been proposed for this unit. 1975 Internat. Astron. Union Information Bull. Jan. 7 Commission 40 resolved that the name ‘Jansky’, abbreviated ‘Jy’, be adopted as the unit of flux density in radio astronomy. 1979 Sky & Telescope Feb. 134/2 As the star rose above the horizon, he found that it was emitting at 0.5 jansky. 1985 Times 23 Jan. 16/6 A strong radio source would provide a signal of several hundred janskys. This entry has not yet been fully updated (first published 1993; most recently modified version published online June 2018). < n.1966
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