APOD: Jupiter's Swirls from Juno (2023 May 23)

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APOD: Jupiter's Swirls from Juno (2023 May 23)

Post by APOD Robot » Tue May 23, 2023 4:08 am

Image Jupiter's Swirls from Juno

Explanation: Big storms are different on Jupiter. On Earth, huge hurricanes and colossal cyclones are centered on regions of low pressure, but on Jupiter, it is the high-pressure, anti-cyclone storms that are the largest. On Earth, large storms can last weeks, but on Jupiter they can last years. On Earth, large storms can be as large as a country, but on Jupiter, large storms can be as large as planet Earth. Both types of storms are known to exhibit lightning. The featured image of Jupiter's clouds was composed from images and data captured by the robotic Juno spacecraft as it swooped close to the massive planet in August 2020.  A swirling white oval is visible nearby, while numerous smaller cloud swirls extend into the distance.  On Jupiter, light-colored clouds are usually higher up than dark clouds. Despite their differences, studying storm clouds on distant Jupiter provides insights into storms and other weather patterns on familiar Earth. 

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RocketRon

Re: APOD: Jupiter's Swirls from Juno (2023 May 23)

Post by RocketRon » Tue May 23, 2023 5:27 am

Intriguing image !

Do we have a handle on what these 'clouds' are actually composed of ?

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Re: APOD: Jupiter's Swirls from Juno (2023 May 23)

Post by daddyo » Tue May 23, 2023 5:33 am

And are the lower clouds darker due to shadowing by the higher clouds?

Has a 3D stereo image been done of Jupiter’s clouds? That might look amazing to actually see the cloud depth.

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Re: APOD: Jupiter's Swirls from Juno (2023 May 23)

Post by Ann » Tue May 23, 2023 5:46 am

RocketRon wrote: Tue May 23, 2023 5:27 am Intriguing image !

Do we have a handle on what these 'clouds' are actually composed of ?

Umm... Ammonia? Methane? Some water?

Anyway....


This spectacle looks otherworldly! And, of course, it is.

What do the corresponding "worldly" storms look like? I really recommend this page if you want to sneak a peek! Let me show you a preview:


Of course, if you think that the Jovian clouds look just too different from the Earth clouds, it may have at least something to do with scale (and just possibly resolution). The storm clouds on Jupiter are just so, so much larger than the ones on Earth.

(And, yeah... Storm clouds on Earth are low pressure zones, but on Jupiter they are high pressure zones... whatever...)

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Re: APOD: Jupiter's Swirls from Juno (2023 May 23)

Post by Lasse H » Tue May 23, 2023 8:10 am

"On Jupiter, light-colored clouds are usually higher up than dark clouds."

The same goes for earth, I think. Isn't just because clouds higher up get more light than the ones deeper down?
- Which are in more shadow than the ones on top, of course.
As simple as that?

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Re: APOD: Jupiter's Swirls from Juno (2023 May 23)

Post by Chris Peterson » Tue May 23, 2023 1:14 pm

Lasse H wrote: Tue May 23, 2023 8:10 am "On Jupiter, light-colored clouds are usually higher up than dark clouds."

The same goes for earth, I think. Isn't just because clouds higher up get more light than the ones deeper down?
- Which are in more shadow than the ones on top, of course.
As simple as that?
No, the reference is to "lightness" in the sense of actual reflectivity. Clouds on Earth are only made of water droplets, which essentially reflect white light. Clouds on Jupiter are made of gases and droplets of other compounds, and selectively reflect different wavelengths, impacting their color and how bright they appear.
Chris

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Re: APOD: Jupiter's Swirls from Juno (2023 May 23)

Post by orin stepanek » Tue May 23, 2023 6:32 pm

JupiterSwirls_JunoGill_960.jpg
I like todays APOD! 8-) :D
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Re: APOD: Jupiter's Swirls from Juno (2023 May 23)

Post by johnnydeep » Tue May 23, 2023 9:09 pm

Chris Peterson wrote: Tue May 23, 2023 1:14 pm
Lasse H wrote: Tue May 23, 2023 8:10 am "On Jupiter, light-colored clouds are usually higher up than dark clouds."

The same goes for earth, I think. Isn't just because clouds higher up get more light than the ones deeper down?
- Which are in more shadow than the ones on top, of course.
As simple as that?
No, the reference is to "lightness" in the sense of actual reflectivity. Clouds on Earth are only made of water droplets, which essentially reflect white light. Clouds on Jupiter are made of gases and droplets of other compounds, and selectively reflect different wavelengths, impacting their color and how bright they appear.
With the conclusion being that the higher clouds are preferentially made of different compounds than lower clouds, and THAT's why the higher clouds are brighter in appearance, right?

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Re: APOD: Jupiter's Swirls from Juno (2023 May 23)

Post by zendae » Tue May 23, 2023 9:59 pm


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Re: APOD: Jupiter's Swirls from Juno (2023 May 23)

Post by longtry » Wed May 24, 2023 2:55 am

Today's image is so impressive I thought it was a 3D model before reading that it was actually taken by Juno. All of the spacecraft's photos that I've seen before don't have a depth of this level, so it stands out as a pleasant surprise.

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Re: APOD: Jupiter's Swirls from Juno (2023 May 23)

Post by Rauf » Wed May 24, 2023 7:22 am

zendae wrote: Tue May 23, 2023 9:59 pm Jupiter has nothing on Earth when it comes to clouds...
Are these Earth's clouds?

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Re: APOD: Jupiter's Swirls from Juno (2023 May 23)

Post by johnnydeep » Wed May 24, 2023 8:56 pm

Rauf wrote: Wed May 24, 2023 7:22 am
zendae wrote: Tue May 23, 2023 9:59 pm Jupiter has nothing on Earth when it comes to clouds...
...
Are these Earth's clouds?
Yes. Unusual ones. :) But I wouldn't count Jupiter out, since we haven't seen its clouds from underneath them yet!
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Re: APOD: Jupiter's Swirls from Juno (2023 May 23)

Post by VictorBorun » Sat May 27, 2023 1:56 pm

daddyo wrote: Tue May 23, 2023 5:33 am And are the lower clouds darker due to shadowing by the higher clouds?

Has a 3D stereo image been done of Jupiter’s clouds? That might look amazing to actually see the cloud depth.
a stereo mission to Jupiter is need!

What puzzles me is that while wiki says the walls and canyons we see between next companions are not looming high at all, just a few tens of kilometers above the visible clouds

a white oval is typically huge, about the size of Earth

Is it the low sun that tricks us into seeing taller-than-life cloud castles?