The Enceladus Deep

Our love affair with Enceladus grows deeper:

PIA18071A substantial ocean most likely exists beneath the icy surface of Saturn’s diminutive moon Enceladus, raising the possibility that primitive forms of extraterrestrial life exist in its briny depths.

The ocean lies between the moon’s rocky core and a layer of thick ice, and is estimated to be about the size of Lake Superior. That’s large for a moon that is only 310 miles (500 kilometers) in diameter and could fit within the borders of Arizona.

In our solar system, the only other moon known to have similar contact between liquid water and rock is Jupiter’s Europa. Both the rock and the water are considered to be essential for the chemistry that could, over eons, turn nonliving matter into living entities.

“The main implication of our work is that there are potentially habitable environments in our solar system that are entirely unexpected,” said Luciano Iess, an aerospace engineer at the Sapienza University of Rome and lead author on the study published Thursday in the journal Science.

(Kaufman)

The essential question is actually a matter of opinion, sort of: How important is this?

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Shine On, Cassini

Titan Layers (detail)

“Each flyby gives us a little more knowledge of Titan and its striking similarities to our world. Even with its cold surface temperatures of minus 290 degrees Fahrenheit (94 kelvins), Titan is like early Earth in a deep freeze.”

(Hill)

It’s a cosmic diamond jubilee, of sorts. The clock is running, with Cassini set to undertake it’s T-99 flyby of Titan tomorrow (March 6, 2014; 0725 PST). An additional flyby undertaken after the original schedule was settled makes this officially the spacecraft’s one-hundredth survey of Saturn’s largest moon.

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