AkaSci, (edited ) to space
@AkaSci@fosstodon.org avatar

The NASA Juno spacecraft will make its 51st flyby of Jupiter (Perijove 51) tomorrow morning around 3:30 a.m. EDT (7:30 a.m. UTC).
A few hours earlier, it will observe the Galilean moon Io from a distance of ~35,000 km.
https://eyes.nasa.gov/apps/solar-system/#/jupiter/moons/io?time=2023-05-16T03:20:06.000+00:00&rate=0

1/n.

AkaSci, (edited )
@AkaSci@fosstodon.org avatar

Here are the dates for the next set of Jupiter flybys by Juno.
The next 6 Perijoves will all feature close flybys of the moon Io.
Source: https://www.lpi.usra.edu/opag/meetings/jun2022/slides/Bolton.pdf

4/n

AkaSci, (edited )
@AkaSci@fosstodon.org avatar

We shouldn't expect images like this from Juno's close flyby of Io tonight. This image was taken by the Galileo probe on Sept 19, 1997, with its much higher resolution 7" Cassegrain telescope based camera. But the images in Dec 2023 and Feb 2024, from an altitude of 1,500 km, will have even better resolution (0.95 km/pixl) than this (5 km/pixl).
Check out this thread https://fosstodon.org/@AkaSci/109970779441795420 for a comparison between JunoCam and Galileo's SSI.
https://solarsystem.nasa.gov/resources/810/ios-pele-hemisphere-after-pillan-changes/

7/n

AkaSci, (edited )
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This infrared image of Io is based on data taken on July 5, 2022 by Juno's Jovian Infrared Auroral Mapper (JIRAM) instrument, from a distance of 80,000 km. The bright spots highlight active volcanoes that dot the moon.

JIRAM, developed by the Italians, contains an imager at 3.45 μm and 4.78 μm wavelengths and a spectrometer that covers 2-5 μm wavelengths. Its primary targets are Jupiter's atmosphere and its auroral regions.

https://www.jpl.nasa.gov/images/pia25698-jupiters-moon-io-seen-in-infrared-light

9/n

AkaSci, (edited )
@AkaSci@fosstodon.org avatar

All instruments on Juno must be clicking and whirring away at this moment as Juno passes by Io, at a distance of 35,000 km from its volcanic surface.

Saying hasta la vista and I'll be back 😎


10/n

AkaSci, (edited )
@AkaSci@fosstodon.org avatar

That was fast! 5 hours after closest approach to Jupiter at an altitude of 4,200 km, Juno is racing away, back towards its apojove 6.4 million km away. It will be back in 38 days for Perijove 52.
Images will be posted soon by the Juno team and citizen scientists at https://www.missionjuno.swri.edu/junocam/processing

11/n

alsutton, to random

In all seriousness, the US first nature of is a pattern I’ve seen so regularly, and for so ling (Since the Google Glass launch), that I regularly call their inclusivity claims bullsh*t.

You don’t get good, inclusive, feedback from one country, especially one which has a high proportion of native English speakers. Proof? Try asking folk with English as a second language about Assistant, or the ease of comprehension for some error messages.

They are not learning 🤦‍♂️

cosmos4u, to random

Another encounter of with 's moon is coming up next week - here is a preview: https://www.youtube.com/watch?v=6oMDd7rAeHw

mau, to random Italian
@mau@frenfiverse.net avatar

Ci sono o ci fanno?

facce come il culo

https://xmau.com/wp/notiziole/2023/05/04/ci-sono-o-ci-fanno-2/

eyeling, to space

Starting today I will post a page of my "Good Night(sky) Stories" each . It's a visual journey through our solar system and beyond, combining cute cartoons with scientific facts and trite humor. Basically the result of an artist and an astrophysicist distracting themselves during boring meetings.
German version: https://mastodon.art/@eyeling/109501818170699384

text page: Our sun makes up 99,86% of the Solar System's mass. It's 330,000 times heavier than Earth and has an output of 3,86 x 1026 Watt. The amount of radiant energy that reaches the Earth's surface alone exceeds the annual electricity generation on Earth by 35,000 times. The planets' relationship with our Sun is stable in the long run. But when our host star burns out in five billion years and expands into a red giant, the sun will engulf Mercury first and then Venus. Earth and Mars will have to watch, be roasted and displaced into more distant paths, surviving badly burned for a while longer.

eyeling,

So how was your ?
and are already done with it.
German version: https://mastodon.art/@eyeling/109977887913468635

Text page: The Galilean moons Io, Europa, Ganymede and Callisto are pretty stressed, especially the two innermost: The gas planet’s tidal forces press dark lines (lineae) into Europa’s surface, also liquefying parts of its icy crust. Coworking Io reacts explosively, spewing sulphur. As if that weren't enough, Jupiter is also inducing electric currents leading to further heating, especially on Io (see next pages) and making Callisto and Ganymede cry saltwater ocean under their surface.

eyeling,

Forgot to update for a while, but here's the next part. Continuing a similar theme.

German language thread: https://mastodon.art/@eyeling/109977887913468635

Text page: With over 400 volcanoes, Jupiter's moon Io shows the most active volcanism in the solar system. Jupiter's tidal forces are 6000 times stronger than those between Earth and the Moon. They become even more intense through interactions with the neighbouring moons Europa and Ganymede. This creates tidal mountains up to 300 m high on Io and an active surface from which impact craters quickly disappear. Io spits several tons of colourful sulphur compounds per second, which make it look like a rotten tomato and even form an atmosphere. However, this remains very thin, as it is evaporated by Jupiter's influence as quickly as it is generated.

eyeling, to random German

Vor sechs Jahren haben ein Astrophysiker und ich angefangen, uns langweilige Konferenzen mit Spinnerein zu vertreiben. Das Ergebnis waren astrophilosophische Cartoons, die jetzt bald gebunden erscheinen werden. Hier schonmal ein erster Blick.
(English version in the works, too)

Wissenschaftlicher Hintergrund als Bild: Unsere Sonne vereint in sich 99,86 % der Masse des gesamten Sonnensystems. Sie ist 330.000 Mal schwerer als die Erde und hat eine Leistung von 3,86 x 1026 Watt SUCHE NOCH NETTEN VERGLEICH Allein die Menge Strahlungsenergie, die auf der Erdoberfläche ankommt trifft, übersteigt die jährliche Weltstromerzeugung um das 35.000-fache. Die Beziehung der inneren Planeten zur Sonne ist auf lange Sicht stabil. Aber wenn unser Zentralstern in fünf Milliarden Jahren ausgebrannt ist und sich zu einem roten Riesen aufblähen wird, wird die Sonne zuerst Merkur und dann Venus verschlingen. Erde und Mars werden müssen dabei zusehen und werden geröstet und in weiter entfernte Bahnen verdrängt.

eyeling,

Und, wie war euer so?
und und haben schon genug von der Arbeitswoche.
Thread auf Englisch: https://mastodon.art/@eyeling/109938182215899452

Textseite: Unter den vier Galileischen Monden Io, Europa, Ganymed und Kallisto kann keiner eine ruhige Kugel schieben, vor allem nicht die beiden innersten: Die Gravitationskräfte des Gasplaneten pressen Falten (Liniae) in den Eismond Europa und verflüssigen Teile der Oberfläche. Nachbarmond Io reagiert dagegen explosiv mit Schwefelvulkanismus. Als ob das nicht genug wäre, setzt Jupiter sie außerdem unter Strom durch magnetische Wechselwirkungen. Das heizt besonders Io weiter auf (siehe Folgeseite) und bringt Kallisto und Ganymed zum Weinen: Es sammeln sich Salzwasser-Ozeane unter ihrer Kruste.

eyeling,

Und? Erholsame Feiertage mit den Lieben gehabt? ;)

Auf Englisch: https://mastodon.art/@eyeling/110175541189105810

Textseite: Der Jupitermond Io zeigt mit über 400 Vulkanen den aktivsten Vulkanismus im Sonnensystem. Die Gezeitenkräfte Jupiters sind 6000 Mal stärker als die zwischen Erde und Mond. Sie werden noch intensiver durch Wechselwirkungen mit den Nachbarmonden Europa und Ganymed. So entstehen auf Io bis zu 300 m hohe Gezeitenberge und eine aktive Oberfläche, von der Einschlagskrater schnell verschwinden. Io spuckt mehrere Tonnen farbintensive Schwefelverbindungen pro Sekunde, die ihn wie eine faulige Tomate aussehen lassen und sogar eine Atmosphäre bilden. Diese bleibt allerdings sehr dünn, da sie durch Jupiters Einfluss genauso schnell verflüchtigt wird, wie sie erzeugt wird.

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