Starship Asterisk*

That ‘Jupiter Abyss’ feature…sure enough! That's when you wonder what is going on under those swirling clouds. It's so fascinating we're able to see these dark spots from Earth, but still there is a lot we don’t understand. Now Juno's sending back information, we can't wait to see what it's going to say next; this might totally revolutionize the way we think about Jupiter!

When Juno makes another pass over the 'abyss', could it view the feature at an oblique angle to better determine depth?

This could be where Carl Sagan's "sinkers" congregate on Jupiter! https://www.youtube.com/watch?v=uakLB7Eni2E

[quote=Ann post_id=342096 time=1730620725 user_id=129702]
And there are "black holes" elsewhere in the Solar system, too:
[img3="Arsia Mons cave entrance on Mars. Credit: NASA / Jet Propulsion Laboratory / University of Arizona"]https://upload.wikimedia.org/wikipedia/commons/thumb/e/ec/Mars%3B_Arsia_Mons_cave_entrance_-MRO.jpg/654px-Mars%3B_Arsia_Mons_cave_entrance_-MRO.jpg[/img3]
Ann
[/quote]

my first thought is "At last we know where the [url=https://en.wikipedia.org/wiki/Space_Apprentice#Plot_summary]Flying Martian Leech aka sora-tobu hiru[/url] lurks"

[attachment=0]марсианские пиявки scale_1200.png[/attachment]

then I look up Wiki and is cold showered: [url=https://en.wikipedia.org/wiki/Arsia_Mons#Possible_cave_entrances]due to the extreme altitude, it is unlikely that they will be able to harbour any form of Martian life[/url]
Too cold this close to the South Pole!

But then they admit that [i]it must be at least 178 meters deep[/i] (I understand the estimate came from the fact that [i]From day to night, temperatures of the circular features change only about one-third as much as the change in temperature of surrounding ground.[/i])

So no limit to this cave be much deeper, and having a warmer and thermally stable bottom. Flying Martian Leech stays a possibility so far :)

[img3="Jupiter Abyss.
Image Credit: NASA, Juno, SwRI, MSSS; Processing & License: Gerald Eichstädt & Sean Doran"]https://apod.nasa.gov/apod/image/2411/JupiterAbyss_JunoEichstadt_1080.jpg[/img3]


Yes, that dark spot may be a vortex and thus a "black hole" for all I know! :wink:

And there are "black holes" elsewhere in the Solar system, too:


[img3="Arsia Mons cave entrance on Mars. Credit: NASA / Jet Propulsion Laboratory / University of Arizona"]https://upload.wikimedia.org/wikipedia/commons/thumb/e/ec/Mars%3B_Arsia_Mons_cave_entrance_-MRO.jpg/654px-Mars%3B_Arsia_Mons_cave_entrance_-MRO.jpg[/img3]



However, the most impressive pit in today's APOD is the amazing Saltstraumen vortex here on Earth, seen in a video that today's caption has a link to:


[float=left][attachment=1]Deepest Hole in The Ocean Whirlpool Saltstraumen.png[/attachment][c][size=85][color=#0040FF]Saltstraumen vortex, the deepest hole in the ocean![/color][/size][/c][/float][float=right][youtube]https://www.youtube.com/watch?v=-XMd8AnEJBA[/youtube][/float]
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I remember reading [i]20,000 Leagues Under the Sea[/i] by Jules Verne when I was a kid, and its ambiguous hero, Captain Nemo, was caught in another vortex, the Moskstraumen, also off the coast of Norway. In the novel, Captain Nemo apparently died as he was relentlessly sucked into the vortex's immeasurable depth - well, its depth seemed immeasurable to me - and I shuddered. Shudder! :ohno:

But Jules Verne's editor was apparently unhappy about the main character's grisly end in a family-friendly novel, so he had Verne resurrect the character again. Well, if Sherlock Holmes could survive falling into the Reichenbach Falls, when his creator Arthur Conan Doyle needed more money and was too besieged by angry Sherlock Holmes fans, I guess it wouldn't be too hard for Jules Verne to make Captain Nemo to escape the clutches of the Moskstraumen vortex.


[float=left][img3="Captain Nemo on top of Nautilus. Credit: Alphonse de Neuville and Édouard Riou"]https://upload.wikimedia.org/wikipedia/commons/9/9d/%27Twenty_Thousand_Leagues_Under_the_Sea%27_by_Neuville_and_Riou_027.jpg[/img3][/float][float=right][img3="Sherlock Holmes and Professor Moriarty at the Reichenbach Falls. Ilustration by Sidney Paget to the Sherlock Holmes story The Final Problem by Sir Arthur Conan Doyle. "]https://upload.wikimedia.org/wikipedia/commons/thumb/8/82/Sherlock_Holmes_and_Professor_Moriarty_at_the_Reichenbach_Falls.jpg/800px-Sherlock_Holmes_and_Professor_Moriarty_at_the_Reichenbach_Falls.jpg[/img3][/float]
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Well, back to the APOD. I have nothing to say about the "dark hole" of Jupiter, but if that thing is indeed a local abyss, then Jupiter's cloud cover has its heights, too. Most famous of these is of course the Great Red Spot, 8 kilometers or 5 miles above sea level - eh, I mean, 8 kilometers or 5 miles above the surrounding cloud cover.


[float=left][attachment=0]Great Red Spot elevation and Juno.png[/attachment][/float]
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The elevation of the Great Red Spot above the cloud cover of Jupiter is not quite as high as Mount Everest. But, you know, give or take?

Ann

[url=https://apod.nasa.gov/apod/ap241103.html] [img]https://apod.nasa.gov/apod/calendar/S_241103.jpg[/img] [size=150]Jupiter Abyss[/size][/url]

[b] Explanation: [/b] What's that black spot on Jupiter? No one is sure. During one pass of NASA's [url=https://www.jpl.nasa.gov/missions/juno/]Juno[/url] over [url=https://science.nasa.gov/jupiter/]Jupiter[/url], the robotic spacecraft imaged an [url=https://apod.nasa.gov/apod/ap171008.html]usually dark cloud[/url] feature informally dubbed [url=https://www.jpl.nasa.gov/images/pia22948-jupiter-abyss/]the Abyss[/url]. Surrounding cloud patterns show [url=https://photojournal.jpl.nasa.gov/catalog/PIA22948]the Abyss[/url] to be at the center of [url=https://www.youtube.com/watch?v=-XMd8AnEJBA]a vortex[/url]. Since dark features on [url=https://en.wikipedia.org/wiki/Atmosphere_of_Jupiter]Jupiter's atmosphere[/url] tend to run deeper than light features, the Abyss may really be the [url=https://www.popularmechanics.com/technology/infrastructure/g2919/7-of-the-deepest-manmade-holes/]deep hole[/url] that it appears -- but without more evidence that remains conjecture. The [url=https://www.reddit.com/media?url=https%3A%2F%2Fi.redd.it%2F1h6ozh8wsu501.jpg]Abyss[/url] is surrounded by a complex of [url=https://apod.nasa.gov/apod/ap181121.html]meandering clouds[/url] and other [url=https://apod.nasa.gov/apod/ap180521.html]swirling[/url] [url=https://apod.nasa.gov/apod/ap170228.html]storm systems[/url], some of which are topped by light colored, high-altitude clouds. The [url=https://www.missionjuno.swri.edu/junocam/processing?id=6906]featured image[/url] was captured in 2019 while [url=https://apod.nasa.gov/apod/ap190205.html]Juno passed[/url] only about 15,000 kilometers above [url=https://www.reddit.com/r/spaceporn/comments/10b94mk/jupiters_abyss_the_dark_center_of_a_massive/]Jupiter's cloud tops[/url]. The [url=https://en.wikipedia.org/wiki/Juno_(spacecraft)#Timeline]next close pass[/url] of Juno near Jupiter will be in about three weeks.


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