[NetBehaviour] Eerie Sounds of Saturn's Radio Emissions
marc.garrett at furtherfield.org
Fri Jul 29 18:28:56 CEST 2005
*Eerie Sounds of Saturn's Radio Emissions*
Saturn is a source of intense radio emissions, which have been monitored
by the Cassini spacecraft. The radio waves are closely related to the
auroras near the poles of the planet. These auroras are similar to
Earth's northern and southern lights. This is an audio file of radio
emissions from Saturn.
The Cassini spacecraft began detecting these radio emissions in April
2002, when Cassini was 374 million kilometers (234 million miles) from
the planet, using the Cassini radio and plasma wave science instrument.
The radio and plasma wave instrument has now provided the first high
resolution observations of these emissions, showing an amazing array of
variations in frequency and time. The complex radio spectrum with rising
and falling tones, is very similar to Earth's auroral radio emissions.
These structures indicate that there are numerous small radio sources
moving along magnetic field lines threading the auroral region.
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