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

Free at last!
The 16m long Radar for Icy Moons Exploration (RIME) antenna on the ESA Juice spacecraft, which had been stuck for a month after unfolding 2 of its 6 segments, is finally free 🛰️ 🎉

A mechanical device called a ‘non-explosive actuator’ (NEA), located in the jammed bracket was fired today. The resulting shock moved the stuck pin just enough to allow the antenna to break free and unfold.

https://www.esa.int/Science_Exploration/Space_Science/Juice/Juice_s_RIME_antenna_breaks_free

1/n

AkaSci,
@AkaSci@fosstodon.org avatar

The video below shows how the 6 segments of the RIME antenna on the ESA Juice spacecraft were delicately unfolded during lab testing.

https://vimeo.com/788348927?embedded=true&source=vimeo_logo&owner=88453491

See this earlier thread for some more info on the RIME antenna - https://fosstodon.org/@AkaSci/110310214930658092


2/n

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

Here is an example of a non-explosive actuator (NEA) and a video of its operating principles. NEAs deliver a sharp force by releasing a spring-loaded bolt. They are triggered by an electrical current.
https://youtu.be/nAIru9vHkWc

3/n

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

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

ESA is getting ready to "shake loose" the 16m long RIME antenna on the Juice spacecraft, which has been stuck after unfolding 2 of its 6 segments.

A tiny stuck pin is believed to be preventing the antenna segments from hinging out.

The attitude control thrusters and the large 400-newton main engine will be used to shake the pin loose. The spacecraft will also be slewed to rotate the stubborn mounting bracket towards the sun and warm it up.

https://twitter.com/esaoperations/status/1653748482748841985

1/n

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

The ESA Juice spacecraft has two Radar for Icy Moons Exploration (RIME) antenna. Each is 16 m long and extend out on the 2 sides of the spacecraft.
RIME is a 9 MHz radar sounder instrument that can penetrate the surface of the Galilean icy moons to a depth of 9 km, to study sub-surface structures and water.

Deployment of the 2nd antenna has not begun yet.
The 10.5 m magnetometer boom was deployed on April 21.

https://www.esa.int/Science_Exploration/Space_Science/Juice/Work_continues_to_deploy_Juice_RIME_antenna
https://www.esa.int/ESA_Multimedia/Sets/Juice_launch_kit_infographics/(result_type)/images

2/n

itnewsbot, to space

ESA’s Jupiter-bound Probe Hits Antenna Snag - While the few minutes it takes for a spacecraft’s booster rocket to claw its way o... - https://hackaday.com/2023/05/01/esas-jupiter-bound-probe-hits-antenna-snag/

markmccaughrean, to random
@markmccaughrean@mastodon.social avatar

An update on our mission to Jupiter & its icy moons, describing the problems we’re having deploying the big RIME radar antenna designed to penetrate the icy surfaces 🚀🛰️

Fingers crossed that our expert project engineering & spacecraft operations teams can find a solution 🤞

Otherwise deployment & commissioning progress is nominal 👍

http://www.esa.int/Science_Exploration/Space_Science/Juice/Work_continues_to_deploy_Juice_RIME_antenna

Boomer, to fediverse

tubraunschweig, to space German

-Mission: Der Ausleger, auf dem das Magnetometer-Instrument auf der -Raumsonde installiert ist, wurde erfolgreich ausgeklappt. Das J-MAG besteht aus mehreren Sensoren. Einer der Sensoren wurde an der entwickelt.
https://lnk.tu-bs.de/jFL1q5

mondinspace, to space

Sharing some of my favorite images from the archives to commemorate the space telescope’s 33rd anniversary. We should take a moment to appreciate the beauty and wonder of the universe.

Information about the images + Hubble facts, a thread: 1/x

image/png
image/png
image/png

mondinspace,

Image 4

captured a stunning image of from a distance of 653 million kilometers from Earth. The image shows the giant planet's turbulent atmosphere, a new storm brewing, and a changing . Also, the image features Jupiter's icy moon .

Thread: 5/x

mrak, to random
@mrak@solarsystem.social avatar

Now that I have a new home on solarsystem.social, here's a new !

I am a scientist working at the Institut de Physique du Globe de Paris () in France. My research uses the field, , and of the planets to decipher their internal structure and geologic evolution. My favorite terrestrial body is the , but I also work with , , and . Soon I will need to learn about and the icy satellites of !

1/2

kevinmgill, to space

Jupiter, Juno Perijove 50

NASA/JPL-Caltech/SwRI/MSSS/Kevin M. Gill

andrealuck, to space
@andrealuck@fosstodon.org avatar

Just spotted my image of Jupiter, Io & Europa in the Scientific American article by Jonathan O’Callaghan on exploring the Jovian System. Pretty cool!

Here’s the article: https://www.scientificamerican.com/article/at-jupiter-juice-and-clipper-will-work-together-in-hunt-for-life/

Here’s also the full size image in case you wanna zoom in https://flic.kr/p/2n2LDKP


Credit: NASA/JPL-Caltech/SwRI/MSSS /AndreaLuck

kevinmgill, to space

The Juno spacecraft approach on Jupiter, Perijove 50

NASA/JPL-Caltech/SwRI/MSSS/Kevin M. Gill

Jupiter rotating and getting larger as the spacecraft approaches the planet

kevinmgill, to space

Jupiter. NASA Juno Mission Perijove 50 (April 8th)

https://flic.kr/p/2ouCwzV

NASA/JPL-Caltech/SwRI/MSSS/Kevin M. Gill

kevinmgill, to science

Jupiter's North Polar Cyclones. NASA Juno Mission Perijove 50.

NASA/JPL-Caltech/SwRI/MSSS/Kevin M. Gill

kevinmgill, to science

Jupiter & Ganymede, NASA Juno Mission Perijove 50

NASA/JPL-Caltech/SwRI/MSSS/Kevin M. Gill

https://flic.kr/p/2oub75V

cosmos4u, to random

It's now under ten hours til the launch of 's to at 12:15 UTC (instantaneous window): in https://skyweek.wordpress.com/2023/04/13/juice-vor-der-grosen-reise-8-jahre-bis-jupiter I've collected a lot of links that should leave no question unanswered.

JUICE on the rocket, before encapsulation and roll-out

spaceflight, to space

The got a nice 🛰️ video of the flyby, but it's got >200MB. So here's the 1MB version. Original : https://www.jpl.nasa.gov/images/pia25723-juno-offers-a-window-seat-for-a-jupiter-flyby

video/mp4

spaceflight,

is around 5 AU from the sun ☀️ ( ~ 43 ) https://www.jpl.nasa.gov/edu/pdfs/scaless_reference.pdf

The to scale : :ccby: :cc_sa: https://commons.wikimedia.org/wiki/File:Solar_System_true_color_(captions).jpg :cc_zero: https://commons.wikimedia.org/wiki/File:Jupiter_Earth_Moon_Comparison.png Distances :

image/png
image/jpeg

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. #Astronomie #astrocomic #illustration #MastoArt
(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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