APOD: Cyclones at Jupiter's North Pole (2018 Mar 08)

Comments and questions about the APOD on the main view screen.
User avatar
APOD Robot
Otto Posterman
Posts: 3237
Joined: Fri Dec 04, 2009 3:27 am

APOD: Cyclones at Jupiter's North Pole (2018 Mar 08)

Post by APOD Robot » Thu Mar 08, 2018 5:08 am

Image Cyclones at Jupiter's North Pole

Explanation: Juno's Jovian Infrared Auroral Mapper data was used to construct this stunning view of cyclones at Jupiter's North Pole. Measuring the thermal emission from Jovian cloud tops, the infrared the observations are not restricted to the hemisphere illuminated by sunlight. They reveal eight cyclonic features that surround a cyclone about 4,000 kilometers in diameter, just offset from the giant planet's geographic North Pole. Similar data show a cyclone at the Jovian South Pole with five circumpolar cyclones. The South Pole cyclones are slightly larger than their northern cousins. Cassini data has shown that gas giant Saturn's north and south poles each have a single cyclonic storm system.

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

RocketRon

Re: APOD: Cyclones at Jupiter's North Pole (2018 Mar 08)

Post by RocketRon » Thu Mar 08, 2018 6:43 am

Any theories as why the large difference/variations in the numbers of storm systems around the poles on Jupiter and Saturn. ?

Viscosity of the atmosphere perhaps ?
Speed of rotation ?
Heating of the atmosphere from within ?
Exposure to sunlight ?

User avatar
neufer
Vacationer at Tralfamadore
Posts: 15131
Joined: Mon Jan 21, 2008 1:57 pm
Location: Alexandria, Virginia

Re: APOD: Cyclones at Jupiter's North Pole (2018 Mar 08)

Post by neufer » Thu Mar 08, 2018 12:29 pm

RocketRon wrote:
Thu Mar 08, 2018 6:43 am

Any theories as why the large difference/variations in the numbers of storm systems around the poles on Jupiter and Saturn. ?

Viscosity of the atmosphere perhaps ?
Speed of rotation ?
Heating of the atmosphere from within ?
Exposure to sunlight ?
Probably:
  • Speed of rotation
  • Heating/cooling of the atmosphere from within
Art Neuendorffer

De58te
Science Officer
Posts: 158
Joined: Mon Sep 30, 2013 6:35 pm

Re: APOD: Cyclones at Jupiter's North Pole (2018 Mar 08)

Post by De58te » Thu Mar 08, 2018 1:38 pm

I doubt it is speed of rotation as Jupiter and Saturn's rotations differ only by half an Earth hour. [Unless new measurements have been taken that I haven't heard about.] My guess could be mass, Jupiter is 3 times more massive than Saturn, and axle tilt, Jupiter is nearly straight up and down to the ecliptic, whereas Saturn is more titled than Earth is, and Saturn must experience seasons similar to Earth.

User avatar
neufer
Vacationer at Tralfamadore
Posts: 15131
Joined: Mon Jan 21, 2008 1:57 pm
Location: Alexandria, Virginia

Re: APOD: Cyclones at Jupiter's North Pole (2018 Mar 08)

Post by neufer » Thu Mar 08, 2018 1:56 pm

De58te wrote:
Thu Mar 08, 2018 1:38 pm

I doubt it is speed of rotation as Jupiter and Saturn's rotations differ only by half an Earth hour. [Unless new measurements have been taken that I haven't heard about.] My guess could be mass, Jupiter is 3 times more massive than Saturn, and axle tilt, Jupiter is nearly straight up and down to the ecliptic, whereas Saturn is more titled than Earth is, and Saturn must experience seasons similar to Earth.
  • Speed of rotation
  • Heating/cooling of the atmosphere from within
Art Neuendorffer

Strangerbarry

Re: APOD: Cyclones at Jupiter's North Pole (2018 Mar 08)

Post by Strangerbarry » Thu Mar 08, 2018 2:28 pm

I might be imagining it, but it looked to me like the makings of a polar hexagon similar to polar Saturn. Leads me to wonder if there might be cyclones on Saturn, invisible above the surface, that buffet gasses into a hexagonal shape ?

Petrus

Re: APOD: Cyclones at Jupiter's North Pole (2018 Mar 08)

Post by Petrus » Thu Mar 08, 2018 2:34 pm

Just for fun: this picture is unbelievable, Jupiter looks like a giant italian pizza with spicy salami! :)

Strangerbarry

Re: APOD: Cyclones at Jupiter's North Pole (2018 Mar 08)

Post by Strangerbarry » Thu Mar 08, 2018 2:39 pm

Yes, and because Jupiter's rotational axis is straight up and down relative to the ecliptic, the cheese shouldn't slide off

User avatar
bystander
Apathetic Retiree
Posts: 17197
Joined: Mon Aug 28, 2006 2:06 pm
Location: Oklahoma

Re: APOD: Cyclones at Jupiter's North Pole (2018 Mar 08)

Post by bystander » Thu Mar 08, 2018 3:37 pm

Other recent Juno findings and papers: viewtopic.php?t=38088
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

saturno2
Commander
Posts: 596
Joined: Wed Jun 29, 2011 10:05 pm

Re: APOD: Cyclones at Jupiter's North Pole (2018 Mar 08)

Post by saturno2 » Thu Mar 08, 2018 4:18 pm

Interesting but.... the North Pole of Saturn is more
beautiful that North Pole of Jupiter

Rob

Re: APOD: Cyclones at Jupiter's North Pole (2018 Mar 08)

Post by Rob » Thu Mar 08, 2018 4:30 pm

Does anyone know what is the white dot smear near the top right-center of the photo?

Bobarino

Re: APOD: Cyclones at Jupiter's North Pole (2018 Mar 08)

Post by Bobarino » Thu Mar 08, 2018 6:04 pm

This picture made me hungry

sallyseaver
Science Officer
Posts: 101
Joined: Thu Feb 19, 2015 1:33 am

Re: APOD: Cyclones at Jupiter's North Pole (2018 Mar 08)

Post by sallyseaver » Wed Jun 06, 2018 7:56 am

What is the interpretation of the colors? Is this a true-color infrared such that the white parts are cool and the red parts are hot?

User avatar
neufer
Vacationer at Tralfamadore
Posts: 15131
Joined: Mon Jan 21, 2008 1:57 pm
Location: Alexandria, Virginia

Re: APOD: Cyclones at Jupiter's North Pole (2018 Mar 08)

Post by neufer » Wed Jun 06, 2018 12:02 pm


UN-enhanced JunoCam true-color
sallyseaver wrote:
Wed Jun 06, 2018 7:56 am

What is the interpretation of the colors? Is this a true-color infrared such that the white parts are cool and the red parts are hot?
JunoCam is primarily an 'enhanced true-color' visible camera/telescope used primarily for outreach.
https://en.wikipedia.org/wiki/JunoCam wrote:
<<JunoCam (or JCM) is the visible-light camera/telescope of the Juno Jupiter orbiter. It has a field of view of 58 degrees with four filters (3 for visible light). JunoCam is not one of the probe's core scientific instruments; it was put on board primarily for public science and outreach, to increase public engagement, and to make all images available on NASA's website. In addition to visible light filters, it also has a near infrared filter to help detect clouds; a methane filter in addition the visible color filters.>>
Art Neuendorffer