Tuning Into Jupiter
It turns out Earth's big brother, Jupiter, shown here with a moon in the distance, can belt out a tune, or at least a few notes. The radio waves come to Earth in two varieties: long bursts and short ones. They appear when particular parts of Jupiter are aligned with Io -- its closest and most volcanically active moon -- and receiving stations on Earth. | Listen to a recording of Jupiter's sounds here, courtesy of Thomas Ashcraft