Sentence:  Recent interferometer measurements ( Radhakrishnan and Roberts , 1960 ) have shown the 960 - Mc emission of <WSD>Jupiter</WSD> to be partially polarized and to originate in a region of larger diameter than the visible disk . 
Meaning of the word marked with <WSD> tags:  the largest planet and the 5th from the sun; has many satellites and is one of the brightest objects in the night sky