Sentence:  The radio emission of a planet was first detected in 1955 , when Burke and Franklin ( 1955 ) identified the origin of interference like radio noise on their records at about 15 meters wave length as emission from <WSD>Jupiter</WSD> . 
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