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A shadow falls on the ice geysers of Enceladus

So on Twitter, my pal Carolyn Porco — imaging team leader for the phenomenal Cassini Saturn spacecraft — announced that a bunch of raw (that is, unprocessed) images were just released from Cassini. Taken on April 14, these new shots show the moons ...

blogs.discovermagazine.com April 17, 2012

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A shadow falls on the ice geysers of Enceladus - Discover Magazine (blog)

So on Twitter, my pal Carolyn Porco — imaging team leader for the phenomenal Cassini Saturn spacecraft — announced that a bunch of raw (that is, unprocessed) images were just released from Cassini . Taken on April 14, these new shots show the... Geysers of water are erupting from its south pole , reaching heights of hundreds of kilometers, with some particles leaving the tiny moon altogether. It almost looks like a solar eclipse picture, but the dark circle is actually the night side of Enceladus, with the sunlight coming from the lower left. You can see quite a few geyser plumes, blasting up from the surface to such heights that they’re illuminated by the Sun and we can see them around the edge of the moon. As I looked at this shot, I suddenly realized something neat: you can see (at least) three dark arcs across the geysers — I’ve used arrows to point them out in the inset picture. These arcs are actually shadows being cast by the moon itself. The curved edge of the moon’s horizon casts a shadow into space, and where it falls across the geyser plumes it reveals itself as a dark, curved line. What’s so very cool is that you can see the arc of the shadow edge on the upper left — what I’ll call the first arc — is actually higher off the limb of the moon than the one lower on the right (the third one is closer to the limb of the moon...

Books

Introduction to Paleobiology and the Fossil Record

John Wiley & Sons.2013.ISBN: 9781118685402,1118685407.608 pages.

The Satanic Verses

Random House.2011.ISBN: 9780307786654,030778665X.576 pages.

One of the most controversial and acclaimed novels ever written, The Satanic...

Introduction to Mineral Exploration

John Wiley & Sons.2009.ISBN: 9781444309126,1444309129.496 pages.

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Thief of Time

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