APOD: A Long Storm System on Saturn (2019 Sep 15)

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APOD Robot
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APOD: A Long Storm System on Saturn (2019 Sep 15)

Post by APOD Robot » Sun Sep 15, 2019 4:10 am

Image A Long Storm System on Saturn

Explanation: It was one of the largest and longest lived storms ever recorded in our Solar System. First seen in late 2010, the above cloud formation in the northern hemisphere of Saturn started larger than the Earth and soon spread completely around the planet. The storm was tracked not only from Earth but from up close by the robotic Cassini spacecraft currently orbiting Saturn. Pictured here in false colored infrared in February, orange colors indicate clouds deep in the atmosphere, while light colors highlight clouds higher up. The rings of Saturn are seen nearly edge-on as the thin blue horizontal line. The warped dark bands are the shadows of the rings cast onto the cloud tops by the Sun to the upper left. A source of radio noise from lightning, the intense storm was thought to relate to seasonal changes when spring emerges in the north of Saturn. After raging for over six months, the iconic storm circled the entire planet and then tried to absorb its own tail -- which surprisingly caused it to fade away.

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Scabulus
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Re: APOD: A Long Storm System on Saturn (2019 Sep 15)

Post by Scabulus » Sun Sep 15, 2019 4:15 am

Uh, isn't the Cassini spacecraft kaput?

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Chris Peterson
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Re: APOD: A Long Storm System on Saturn (2019 Sep 15)

Post by Chris Peterson » Sun Sep 15, 2019 4:51 am

Scabulus wrote:
Sun Sep 15, 2019 4:15 am
Uh, isn't the Cassini spacecraft kaput?
It wasn't in April 2013 when this APOD originally ran. (Sunday's are repeats.)
Chris

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DL MARTIN

Re: APOD: A Long Storm System on Saturn (2019 Sep 15)

Post by DL MARTIN » Sun Sep 15, 2019 6:30 am

Jupiter seems to have a similar storm pattern. How does it compare with Saturn's?

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Re: APOD: A Long Storm System on Saturn (2019 Sep 15)

Post by Boomer12k » Sun Sep 15, 2019 10:39 am

Weird storm... came around... bit itself... then quit... how can we get a hurricane to do that? Oh, yeah, this one went around the whole planet....yyyeeaaahhhh.... not a good idea here....

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orin stepanek
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Re: APOD: A Long Storm System on Saturn (2019 Sep 15)

Post by orin stepanek » Sun Sep 15, 2019 11:05 am

Larger than a Category 5! :mrgreen: :saturn:
Orin

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RJN
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Re: APOD: A Long Storm System on Saturn (2019 Sep 15)

Post by RJN » Sun Sep 15, 2019 12:32 pm

Scabulus wrote:
Sun Sep 15, 2019 4:15 am
Uh, isn't the Cassini spacecraft kaput?
Yes. The word "currently" has now been changed to "then" in the text on the main NASA APOD. I apologize for the oversight.
- RJN

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Re: APOD: A Long Storm System on Saturn (2019 Sep 15)

Post by FLPhotoCatcher » Sun Sep 15, 2019 3:20 pm

How do they know that the storm "tried to absorb its own tail -- which surprisingly caused it to fade away."?
And it's being compared to a snake. I don't think snakeopomorphizing the storm is the best idea. :lol2:

Ronn M

Re: APOD: A Long Storm System on Saturn (2019 Sep 15)

Post by Ronn M » Sun Sep 15, 2019 3:26 pm

What velocity was the storm's wind? Any way to calculate that?

Thanks,

Ronn

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Re: APOD: A Long Storm System on Saturn (2019 Sep 15)

Post by De58te » Sun Sep 15, 2019 3:33 pm

I am kind of confused by the line, 'largest and longest lived storm ever recorded in our solar system. Maybe they mean largest and longest storm stretching all around the planet. As for longest lived, isn't that the Great Red Spot which supposedly was seen by Galileo hundreds of years ago? I mean if this storm was only first seen in 2010 how do they know it is hundreds of years old? Did Galileo mention seeing that? And if it was so old why didn't anybody see it in the year 2001, or even in the year 1981 when Voyager passed by Saturn?

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Re: APOD: A Long Storm System on Saturn (2019 Sep 15)

Post by MarkBour » Sun Sep 15, 2019 6:35 pm

De58te wrote:
Sun Sep 15, 2019 3:33 pm
I am kind of confused by the line, 'largest and longest lived storm ever recorded in our solar system. Maybe they mean largest and longest storm stretching all around the planet. As for longest lived, isn't that the Great Red Spot which supposedly was seen by Galileo hundreds of years ago? I mean if this storm was only first seen in 2010 how do they know it is hundreds of years old? Did Galileo mention seeing that? And if it was so old why didn't anybody see it in the year 2001, or even in the year 1981 when Voyager passed by Saturn?
Well, you left out the opening modifier in the description: "one of the ..." which totally changes the meaning and immediately answers your questions.
Mark Goldfain

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Re: APOD: A Long Storm System on Saturn (2019 Sep 15)

Post by neufer » Mon Sep 16, 2019 12:10 am

Ronn M wrote:
Sun Sep 15, 2019 3:26 pm

What velocity was the storm's wind?
  • Up to 200 m/s (Category 5 hurricanes include anything 70 m/s or more):
https://www.nasa.gov/mission_pages/cassini/multimedia/pia16722.html wrote:
This image from NASA's Cassini spacecraft reveals the wind patterns within a large vortex that was spawned by a giant northern storm on Saturn. The arrows indicate the local direction of the winds. The vortex, a clockwise-spinning swirl, was spun off from the head of this storm in early December 2010, shortly after the storm erupted. The bright head of the storm moved swiftly in a westward direction around the planet, while this vortex drifted more slowly.
Art Neuendorffer