Cassini: Powering Saturn's Active Ocean Moon

Find out the latest thinking about our universe.
User avatar
bystander
Apathetic Retiree
Posts: 16325
Joined: Mon Aug 28, 2006 2:06 pm
Location: Oklahoma

Cassini: Powering Saturn's Active Ocean Moon

Postby bystander » Tue Nov 07, 2017 2:45 pm

Powering Saturn's Active Ocean Moon
NASA | JPL-Caltech | Cassini | 2017 Nov 06

Heat from friction could power hydrothermal activity on Saturn's moon Enceladus for billions of years if the moon has a highly porous core, according to a new modeling study by European and U.S. researchers working on NASA's Cassini mission.

The study, published today in the journal Nature Astronomy, helps resolve a question scientists have grappled with for a decade: Where does the energy to power the extraordinary geologic activity on Enceladus come from?

Cassini found that Enceladus sprays towering, geyser-like jets of water vapor and icy particles, including simple organics, from warm fractures near its south pole. Additional investigation revealed the moon has a global ocean beneath its icy crust, from which the jets are venting into space. Multiple lines of evidence from Cassini indicate that hydrothermal activity -- hot water interacting chemically with rock -- is taking place on the seafloor.

One of those lines was the detection of tiny rock grains inferred to be the product of hydrothermal chemistry taking place at temperatures of at least 194 degrees Fahrenheit (90 degrees Celsius). The amount of energy required to produce these temperatures is more than scientists think could be provided by decay of radioactive elements in the interior. ...

Heating Ocean Moon Enceladus for Billions of Years
ESA | Science & Technology | Cassini-Huygens | 2017 Nov 06

Powering Prolonged Hydrothermal Activity Inside Enceladus - Gaël Choblet et al
Know the quiet place within your heart and touch the rainbow of possibility; be
alive to the gentle breeze of communication, and please stop being such a jerk.
— Garrison Keillor

HiYoSilver

Re: Cassini: Powering Saturn's Active Ocean Moon

Postby HiYoSilver » Tue Nov 07, 2017 5:28 pm

How much heat can bacteria create? http://pubs.acs.org/doi/abs/10.1021/jp104580t

BDanielMayfield
Don't bring me down
Posts: 1469
Joined: Thu Aug 02, 2012 11:24 am
AKA: Bruce
Location: East Idaho

Re: Cassini: Powering Saturn's Active Ocean Moon

Postby BDanielMayfield » Tue Nov 07, 2017 8:47 pm

HiYoSilver wrote:How much heat can bacteria create? http://pubs.acs.org/doi/abs/10.1021/jp104580t

That would have to be minuscule in comparison to tidal forces. Or, do whales cause the tides here on Earth :?:
Last edited by BDanielMayfield on Tue Nov 07, 2017 9:20 pm, edited 1 time in total.
"Happy are the peaceable ... "

BDanielMayfield
Don't bring me down
Posts: 1469
Joined: Thu Aug 02, 2012 11:24 am
AKA: Bruce
Location: East Idaho

Re: Cassini: Powering Saturn's Active Ocean Moon

Postby BDanielMayfield » Tue Nov 07, 2017 9:19 pm

BDanielMayfield wrote:
HiYoSilver wrote:How much heat can bacteria create? http://pubs.acs.org/doi/abs/10.1021/jp104580t

That would have to be minuscule in comparison to tidal forces. Or, do whales cause the tides here on Earth? :roll:

Otoh, I just remembered how much heat can be generated in a rotting compost pile. Alligators lay their eggs in mounds of leaf litter to use this effect... Must delete the eye roll.

Bruce
"Happy are the peaceable ... "


Return to “The Communications Center: Breaking Science News”

Who is online

Users browsing this forum: CommonCrawl [Bot] and 0 guests