When was Saturn's magnetic field first detected?
The first definite detection of Saturn's magnetic field occurred on the 1st of September 1979. Pioneer 11 passed through the planet's magnetosphere that day and measured its strength directly.
Questions about Magnetosphere of Saturn
Short answers, pulled from the story.
How does Saturn generate its magnetic field?
Saturn generates its magnetic field through fluid motion within liquid metallic hydrogen in its outer core. This dynamo mechanism creates a dipole structure similar to Earth but reversed in polarity with an equatorial field strength measuring about 21 microteslas.
What is the size of Saturn's magnetosphere boundary?
The magnetopause boundary separates solar wind plasma from Saturn's internal environment at distances between 16 and 27 Saturn radii. Average standoff distance settles around 22 Rs depending on solar activity pressure.
Where do water ions originate in Saturn's magnetosphere?
Enceladus ejects up to 1,000 kg/s of water vapor through geysers located near its south pole which forms a thick torus around the moon's orbit at 4 Rs. At least 100 kg/s of this water becomes ionized and joins co-rotating magnetospheric plasma.
When did Cassini arrive at Saturn to study the magnetosphere?
Cassini launched in 1997 arrived in 2004 providing measurements after more than two decades of silence until its intentional destruction on the 15th of September 2017. The spacecraft observed a bowl-shaped plasma sheet warped northward during northern hemisphere winter upon arrival.