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Fraser
2005-Nov-30, 07:20 AM
SUMMARY: Cassini has returned amazing photographs of ice volcanoes erupting from the surface of Saturn's moon Enceladus. On a previous pass of the moon, Cassini detected particles of water vapour stretching hundreds of kilometres above its surface, and this photograph shows the ice volcanoes in action. It's believed they're spewing out material that refreshes the ice in Saturn's E-ring.

View full article (http://www.universetoday.com/am/publish/fountains_of_enceladus.html)
What do you think about this story? post your comments below.

Wolverine
2005-Nov-30, 07:43 AM
How exciting!

Spacemad
2005-Nov-30, 11:47 AM
I was really impressed by the images from Cassini showing, what is thought to be ice particles, being spewed out into orbit from this tiny moon of Saturn's. If it can really be proved beyond doubt that that is the origin of te "F" ring round Saturn, it would be a mayor insight into how the rings are formed &, most improtannt, how they are maintained.
Congratulations are in order to the Cassini team - once again!!! :)

iantresman
2005-Nov-30, 04:15 PM
It looks like a coronal discharge to me, or St Elmo's fire. See for example the "Corona Discharge from a Wire (http://hypertextbook.com/physics/electricity/conductors/)" (first image).

Regards,
Ian Tresman

galacsi
2005-Nov-30, 07:46 PM
It looks like a coronal discharge to me, or St Elmo's fire. See for example the "Corona Discharge from a Wire (http://hypertextbook.com/physics/electricity/conductors/)" (first image).

Regards,
Ian Tresman

Look like some shots of comet Borelly to me.

http://www.space.com/php/multimedia/imagedisplay/img_display.php?pic=h_borelly_close3_02.jpg&cap=Third+of+five+images+of+comet+Borrelly+from+De ep+Space+1.

Cordialement.

ATKINS
2005-Dec-01, 10:27 PM
Originally Posted by iantresman
It looks like a coronal discharge to me, or St Elmo's fire. See for example the "Corona Discharge from a Wire (http://hypertextbook.com/physics/electricity/conductors/)" (first image).

Regards,
Ian Tresman

Look like some shots of comet Borelly to me.

http://www.space.com/php/multimedia/imagedisplay/img_display.php?pic=h_borelly_close3_02.jpg&cap=Third+of+five+images+of+comet+Borrelly+from+De ep+Space+1.

Cordialement.
Interesting pictures, it looks like both to me. What it doesn't look like at all is "ice volcanoes" (whatever they are).

iantresman
2005-Dec-05, 11:44 PM
It looks like a coronal discharge to me, or St Elmo's fire. See for example the "Corona Discharge from a Wire (http://hypertextbook.com/physics/electricity/conductors/)" (first image).

Now after reading today's news item, "New View of Space Weather Cold Fronts (http://www.universetoday.com/am/publish/nasa_nsf_atmosphere.html?5122005)", there is a mention of "plasma plumes (http://science.nasa.gov/ssl/pad/sppb/presentations/plasma_plume.html)" and "plasma fountains (http://science.nasa.gov/ssl/pad/sppb/presentations/bullet3.html)" that on Earth is "spewing an average of 50 tons of plasma per day up out of the gravitational pull of Earth".

Regards,
Ian Tresman