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Unlocking Saturn's Secrets

Bringing some of the mysteries of the universe a little closer to home.

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Owlscrying
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Joined: Mon Apr 03, 2017 3:21 am

Unread post Tue Oct 31, 2017 6:01 pm

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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Owlscrying
Posts: 1612
Joined: Mon Apr 03, 2017 3:21 am

Unread post Tue Oct 31, 2017 6:02 pm



Time on this recording has been compressed such that 73 seconds corresponds to 27 minutes, or, the recording is at 22x real time. Since the frequencies of these emissions are well above the audio frequency range, we have shifted them downward by a factor of 44.

 
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