Reconstruction of the directional antenna used in the discovery of radio emission from space by <a href="https://en.wikipedia.org/wiki/Karl_Guthe_Jansky" class="extiw" title="w:Karl Guthe Jansky">Karl Guthe Jansky</a> at <a href="https://en.wikipedia.org/wiki/Bell_Telephone_Laboratories" class="extiw" title="w:Bell Telephone Laboratories">Bell Telephone Laboratories</a> Holmdel, New Jersy, in 1932, which began the field of <a href="https://en.wikipedia.org/wiki/radio_astronomy" class="extiw" title="w:radio astronomy">radio astronomy</a>.  It is an 8 element Bruce array (a type of <a href="https://en.wikipedia.org/wiki/curtain_array" class="extiw" title="w:curtain array">curtain array</a>) resonant at 14 MHz, consisting of 8 wire dipoles in front of a wire screen reflector.  Now at <a href="https://en.wikipedia.org/wiki/National_Radio_Astronomy_Observatory" class="extiw" title="w:National Radio Astronomy Observatory">National Radio Astronomy Observatory</a> in <a href="https://en.wikipedia.org/wiki/Green_Bank,_West_Virginia" class="extiw" title="w:Green Bank, West Virginia">Green Bank, West Virginia</a>.
<a href="//commons.wikimedia.org/wiki/User:Jarekt" title="User:Jarekt">Jarek Tuszyński</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>