Published:
April 26, 2010
 Jupiter and Saturn emit strongly in radio waves, and astronomers think exoplanets should as well. (Mercury and Mars emit weaker radiation.) Unfortunately, radiation from the solar system's planets lies in the middle of the commercial radio and TV bands, making the hushed signals difficult to detect.
Photo by Mercury, Mars, and Saturn images courtesy NRAO/AUI; Jupiter: ATNF/CSIRO |
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