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Karl Guthe Jansky

Karl Guthe Jansky

Rođenje 22. listopada 1905.
Norman, Oklahoma, Oklahoma, SAD
Smrt 14. veljače 1950.
Red Bank, New Jersey, SAD
Državljanstvo Amerikanac
Polje Fizika
Poznat po Radio astronomija
Portal o životopisima

Karl Guthe Jansky (Norman, Oklahoma, 22. listopada 1905. – Red Bank, New Jersey, 14. veljače 1950.), američki fizičar i radioinženjer. Otkrio da radiošum koji ometa radiokomunikacije dolazi iz svemira, iz smjera Mliječne staze (1931.). Tim je otkrićem započeo razvoj radio astronomije. Po njemu je nazvana nenormirana mjerna jedinica za spektralnu gustoću energetskoga toka janski.[1] Karl Jansky je otkrio prvi astronomski izvor radio valova uz malo sreće. 1930-tih je bio inženjer u Bell Labs, i proučavao je kratke radio valove (3 – 30 MHz), za prijenos signala na druge kontinente. Koristeći usmjerenu antenu, Jansky je primijetio jedan signal nepoznatog porijekla i to je najjači bio svakih 24 sata. Na kraju je otkrio da signal dolazi iz zviježđa Strijelac 1933.[2]

Janski (oznaka Jy) je nenormirana mjerna jedinica spektralne gustoće energijskoga toka elektromagnetskoga zračenja, koja se rabi u radio astronomiji, u značenju: Jy = 10–26 W/(m² Hz).[3]

(SI)

Duplikat u punoj veličini prvog radio teleskopa - Jansky dipolna mreža.

Izvori

[uredi | uredi kôd]
  1. Jansky, Karl Guthe, [1] "Hrvatska enciklopedija", Leksikografski zavod Miroslav Krleža, www.enciklopedija.hr, 2015.
  2. Jansky Karl G.: "Radio waves from outside the solar system", journal = Nature, 1933. [2]
  3. janski, [3] "Hrvatska enciklopedija", Leksikografski zavod Miroslav Krleža, www.enciklopedija.hr, 2015.
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Karl Guthe Jansky
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