![](https://nthumb.tpgimages.com/mid2_ocom_img/dW5pdmVyc2FsX2ltYWdlcw==/20120511_3_rm/2012051416/top_20120514163539_6840.jpg/TOP09100452.jpg)
Karl Guthe Jansky (1905-50) American radio astronomer, at Holmdel, New Jersey, with his directional radio aerial system, the precursor of today's radio telescopes.
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TOP09100452
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達志影像
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