Definitions for "Jansky"
convenient unit of incident spectral flux density used in radio astronomy; 1 Jy = 10-26 W/m2 Hz (named for Karl G. Jansky, initial discoverer of extraterrestrial radio radiations).
a unit used in radio astronomy to measure the strength, or more precisely the flux density, of radio signals from space. In measuring signal strength, it's necessary to take into account both the area of the receiving antenna and the width of the frequency band in which the signal occurs. Accordingly, one jansky equals a flux of 10-26 watts per square meter of receiving area per hertz of frequency band (W/m2Hz). Although it is not an SI unit, the jansky is approved by the International Astronomical Union and is widely used by astronomers. It honors Karl G. Jansky (1905-1950), the American electrical engineer who discovered radio waves from space in 1930. The jansky is sometimes called the flux unit.
A unit of measurement of flux density equal to 10-26 Watts / meter2 / Hz, named after the radio astronomy pioneer Karl Jansky.
Keywords:  marginis, neper, mare, lunar, crater
Jansky is a lunar impact crater that lies along the eastern limb of the Moon. It lies due east of the larger Neper walled plain, along the southern edge of the Mare Marginis. Due to its location, this crater is viewed from the side from Earth, limiting the amount of detail that can be observed.
Keywords:  disambiguation, see, uses
For other uses, see Jansky (disambiguation).