[ noun ] (astronomy) a giant planet which is surrounded by three planar concentric rings of ice particles; 6th planet from the sun
Used in print(Cornell H. Mayer, "Radio Emission of the Moon...)
Of the remaining planets , only Mars and Saturn have been observed as radio_sources , and not very much information is available .
The low intensity of the radiation from Saturn has limited observations , but again the measured radiation seems to be consistent with a thermal origin .
Steady radiation which was presumably of thermal origin was observed from Venus at 3.15 and 9.4 cm , and from Mars and Jupiter at 3.15 cm in 1956 ( Mayer , McCullough , and Sloanaker , 1958 a , b , c ) , and from Saturn at 3.75 cm in 1957 ( Drake and Ewen , 1958 ) .