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

Comments and questions about the APOD on the main view screen.
Post Reply
User avatar
APOD Robot
Otto Posterman
Posts: 5593
Joined: Fri Dec 04, 2009 3:27 am
Contact:

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.

<< Previous APOD This Day in APOD Next APOD >>

Scabulus
Asternaut
Posts: 9
Joined: Thu Feb 02, 2012 3:18 pm

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?

User avatar
Chris Peterson
Abominable Snowman
Posts: 18599
Joined: Wed Jan 31, 2007 11:13 pm
Location: Guffey, Colorado, USA
Contact:

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

*****************************************
Chris L Peterson
Cloudbait Observatory
https://www.cloudbait.com

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?

Boomer12k
:---[===] *
Posts: 2691
Joined: Sun Apr 22, 2007 12:07 am

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....

:---[===] ^

User avatar
orin stepanek
Plutopian
Posts: 8200
Joined: Wed Jul 27, 2005 3:41 pm
Location: Nebraska

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

Smile today; tomorrow's another day!

User avatar
RJN
Baffled Boffin
Posts: 1673
Joined: Sat Jul 24, 2004 1:58 pm
Location: Michigan Tech

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

FLPhotoCatcher
Science Officer
Posts: 247
Joined: Wed Jul 18, 2012 6:51 am

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

De58te
Commander
Posts: 584
Joined: Mon Sep 30, 2013 6:35 pm

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?

User avatar
MarkBour
Subtle Signal
Posts: 1377
Joined: Mon Aug 26, 2013 2:44 pm
Location: Illinois, USA

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

User avatar
neufer
Vacationer at Tralfamadore
Posts: 18805
Joined: Mon Jan 21, 2008 1:57 pm
Location: Alexandria, Virginia

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

User avatar
johnnydeep
Commodore
Posts: 3232
Joined: Sun Feb 20, 2011 8:57 pm

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

Post by johnnydeep » Sun Jul 24, 2022 2:09 pm

So is that black spot toward the lower left the shadow of a moon?
--
"To B̬̻̋̚o̞̮̚̚l̘̲̀᷾d̫͓᷅ͩḷ̯᷁ͮȳ͙᷊͠ Go......Beyond The F͇̤i̙̖e̤̟l̡͓d͈̹s̙͚ We Know."{ʲₒʰₙNYᵈₑᵉₚ}

User avatar
Fred the Cat
Theoretic Apothekitty
Posts: 975
Joined: Mon Feb 22, 2016 4:09 pm
AKA: Ron
Location: Eagle, Idaho

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

Post by Fred the Cat » Sun Jul 24, 2022 3:44 pm

johnnydeep wrote: Sun Jul 24, 2022 2:09 pm So is that black spot toward the lower left the shadow of a moon?
Probably some shadow like illustrated on the Cassini Imaging Team link. :wink:
Saturn  (2).png
Freddy's Felicity "Only ascertain as a cat box survivor"

User avatar
bystander
Apathetic Retiree
Posts: 21592
Joined: Mon Aug 28, 2006 2:06 pm
Location: Oklahoma

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

Post by bystander » Mon Jul 25, 2022 3:27 am

johnnydeep wrote: Sun Jul 24, 2022 2:09 pm So is that black spot toward the lower left the shadow of a moon?
Pictured here
"The shadow of the moon Enceladus is visible on the planet in the lower left of the image."
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

User avatar
johnnydeep
Commodore
Posts: 3232
Joined: Sun Feb 20, 2011 8:57 pm

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

Post by johnnydeep » Mon Jul 25, 2022 12:43 pm

bystander wrote: Mon Jul 25, 2022 3:27 am
johnnydeep wrote: Sun Jul 24, 2022 2:09 pm So is that black spot toward the lower left the shadow of a moon?
Pictured here
"The shadow of the moon Enceladus is visible on the planet in the lower left of the image."
Aha, thanks! I sometimes fail to fully read all the linked-to pages and missed that one.
--
"To B̬̻̋̚o̞̮̚̚l̘̲̀᷾d̫͓᷅ͩḷ̯᷁ͮȳ͙᷊͠ Go......Beyond The F͇̤i̙̖e̤̟l̡͓d͈̹s̙͚ We Know."{ʲₒʰₙNYᵈₑᵉₚ}

Post Reply