Baptiste Journaux
@bjour.bsky.social
Prof in Planetary mineral physics at UW Earth and Space Science department.| icy ocean worlds | ice(s) physic | free diving | www.SeaFreeze.org
Pinned
Baptiste Journaux
@bjour.bsky.social
· Dec 19
On the equilibrium limit of liquid stability in pressurized aqueous systems - Nature Communications
The authors define the cenotectic — the low-temperature stability limit for a liquid under arbitrary thermodynamic conditions — and measure it for several aqueous solutions of relevance to extraterres...
nature.com
Incredibly excited to annonce the publication of our new experimental thermodynamic work at high pressures with the definition of a novel thermodynamic invariant point: The Cenotectic (κ)
nature.com/articles/s41...
nature.com/articles/s41...
What a year! Very grateful for the recognition of all the hard work accomplished by our team at UW and abroad over the last few years by the IAPWS. More exciting things to come very soon!
June 25, 2025 at 6:45 AM
What a year! Very grateful for the recognition of all the hard work accomplished by our team at UW and abroad over the last few years by the IAPWS. More exciting things to come very soon!
Reposted by Baptiste Journaux
Imaging Ganyemede’s Interior using Tides? 🛰️
Here, we propose measuring Ganymede’s response to tidal intercations with Jupiter using JUICE gravity data. In doing so, we can (maybe) tease out shell thickness variations, which would indicate a convecting ocean.
Read more at:
doi.org/10.1029/2025...
Here, we propose measuring Ganymede’s response to tidal intercations with Jupiter using JUICE gravity data. In doing so, we can (maybe) tease out shell thickness variations, which would indicate a convecting ocean.
Read more at:
doi.org/10.1029/2025...
June 3, 2025 at 4:32 AM
Imaging Ganyemede’s Interior using Tides? 🛰️
Here, we propose measuring Ganymede’s response to tidal intercations with Jupiter using JUICE gravity data. In doing so, we can (maybe) tease out shell thickness variations, which would indicate a convecting ocean.
Read more at:
doi.org/10.1029/2025...
Here, we propose measuring Ganymede’s response to tidal intercations with Jupiter using JUICE gravity data. In doing so, we can (maybe) tease out shell thickness variations, which would indicate a convecting ocean.
Read more at:
doi.org/10.1029/2025...
Reposted by Baptiste Journaux
The Moon's nearside mantle is a giant volcano? 🌋
In this study, we infer a 100-200 C temperature anomaly in the Moon's nearside mantle. This anomaly suggests that geologic activity which formed the mare 3-4 billion years ago is still active today.
nature.com/articles/s41...
In this study, we infer a 100-200 C temperature anomaly in the Moon's nearside mantle. This anomaly suggests that geologic activity which formed the mare 3-4 billion years ago is still active today.
nature.com/articles/s41...
May 15, 2025 at 1:15 AM
The Moon's nearside mantle is a giant volcano? 🌋
In this study, we infer a 100-200 C temperature anomaly in the Moon's nearside mantle. This anomaly suggests that geologic activity which formed the mare 3-4 billion years ago is still active today.
nature.com/articles/s41...
In this study, we infer a 100-200 C temperature anomaly in the Moon's nearside mantle. This anomaly suggests that geologic activity which formed the mare 3-4 billion years ago is still active today.
nature.com/articles/s41...
Reposted by Baptiste Journaux
Reposted by Baptiste Journaux
@uwess.bsky.social's @bjour.bsky.social is uncovering how the "cenotectic" could reshape our search for life on icy moons.
Journaux and @tamu.bsky.social's Matt Powell-Palm dive into extreme environments, and what they reveal about more than just planetary science.
ess.uw.edu/2025/03/unlo...
Journaux and @tamu.bsky.social's Matt Powell-Palm dive into extreme environments, and what they reveal about more than just planetary science.
ess.uw.edu/2025/03/unlo...
Unlocking the secrets of icy moons: how the ‘cenotectic’ could revolutionize the search for life beyond Eartharrowarrowarrowarrowarrowarrow
ess.uw.edu
March 12, 2025 at 9:47 PM
@uwess.bsky.social's @bjour.bsky.social is uncovering how the "cenotectic" could reshape our search for life on icy moons.
Journaux and @tamu.bsky.social's Matt Powell-Palm dive into extreme environments, and what they reveal about more than just planetary science.
ess.uw.edu/2025/03/unlo...
Journaux and @tamu.bsky.social's Matt Powell-Palm dive into extreme environments, and what they reveal about more than just planetary science.
ess.uw.edu/2025/03/unlo...
Reposted by Baptiste Journaux
🚀 As NASA’s Europa Clipper embarks on its 5.5-year journey to Europa, a new study in Nature Communications led by UW planetary scientist @bjour.bsky.social reveals groundbreaking research that could revolutionize the search for habitability in our solar system and beyond.
Read the full story👇
Read the full story👇
Unlocking the secrets of icy moons: how the ‘cenotectic’ could revolutionize the search for life beyond Eartharrowarrowarrowarrowarrowarrow
ess.uw.edu
March 11, 2025 at 5:23 PM
🚀 As NASA’s Europa Clipper embarks on its 5.5-year journey to Europa, a new study in Nature Communications led by UW planetary scientist @bjour.bsky.social reveals groundbreaking research that could revolutionize the search for habitability in our solar system and beyond.
Read the full story👇
Read the full story👇
Reposted by Baptiste Journaux
Undergrads I mentor are seeking PhD programs. Grad students I work with are looking for postdoc positions. Postdocs like me are hoping to become faculty.
Without federal support, many of these dreams will evaporate. It's alarming and depressing to watch so many doors close around us.
Without federal support, many of these dreams will evaporate. It's alarming and depressing to watch so many doors close around us.
Hiring freezes, fewer grad students: Funding uncertainty hits colleges
Universities are tightening their belts and reducing graduate student enrollments to steel themselves for potential Trump administration funding cuts.
www.washingtonpost.com
March 6, 2025 at 12:37 AM
Undergrads I mentor are seeking PhD programs. Grad students I work with are looking for postdoc positions. Postdocs like me are hoping to become faculty.
Without federal support, many of these dreams will evaporate. It's alarming and depressing to watch so many doors close around us.
Without federal support, many of these dreams will evaporate. It's alarming and depressing to watch so many doors close around us.
Reposted by Baptiste Journaux
We are experiencing an assault on science unparalleled by anything I’ve seen in my life. It’s not one issue or another anymore, the entire institution is under attack by the most powerful individuals in the country.
This Friday, where will you be?
standupforscience2025.org
This Friday, where will you be?
standupforscience2025.org
March 2, 2025 at 4:27 PM
We are experiencing an assault on science unparalleled by anything I’ve seen in my life. It’s not one issue or another anymore, the entire institution is under attack by the most powerful individuals in the country.
This Friday, where will you be?
standupforscience2025.org
This Friday, where will you be?
standupforscience2025.org
Reposted by Baptiste Journaux
For anyone disappointed by 2024 YR4's disappearing threat please remember that even at its peak of ~3% chance it still had a negative rating on the Palermo scale. 1/
February 24, 2025 at 4:15 AM
For anyone disappointed by 2024 YR4's disappearing threat please remember that even at its peak of ~3% chance it still had a negative rating on the Palermo scale. 1/
Reposted by Baptiste Journaux
Anyway,
"GenAI can inhibit critical engagement with work and can potentially lead to long-term overreliance on the tool and diminished skill for independent problem-solving"
bsky.app/profile/keta...
"GenAI can inhibit critical engagement with work and can potentially lead to long-term overreliance on the tool and diminished skill for independent problem-solving"
bsky.app/profile/keta...
Microsoft's own research confirms something that was already pretty obvious: relying on a text generating machine to come up with answers erodes critical thinking, and is a method favoured by those who never liked doing critical thinking in the first place
advait.org/files/lee_20...
advait.org/files/lee_20...
advait.org
February 19, 2025 at 8:35 PM
Anyway,
"GenAI can inhibit critical engagement with work and can potentially lead to long-term overreliance on the tool and diminished skill for independent problem-solving"
bsky.app/profile/keta...
"GenAI can inhibit critical engagement with work and can potentially lead to long-term overreliance on the tool and diminished skill for independent problem-solving"
bsky.app/profile/keta...
To understand why the probability of impact was increasing in recent days and is likely to drop to 0 in the next few days/weeks it is important to realize that it was mostly driven by the size of the 1sigma uncertainty which diminished with better observations while earth was still inside it.
Updated 2/19/25: much better with new data moving the estimated time of closest approach away from impact and the uncertainty reduced, so there is a considerable gap between the 1-sigma errorbar and impact for the first time.
February 19, 2025 at 5:53 PM
To understand why the probability of impact was increasing in recent days and is likely to drop to 0 in the next few days/weeks it is important to realize that it was mostly driven by the size of the 1sigma uncertainty which diminished with better observations while earth was still inside it.
Reposted by Baptiste Journaux
New results from several of my colleagues in the Planetary Interiors and Geophysics group at JPL (which we lovingly refer to as PIGS).
Does Callisto host an ocean deep beneath its icy exterior? It’s looking more and more likely.
New research from @coreyjcochrane.bsky.social, @stevendvance.bsky.social, @lukeliuzzo.bsky.social in @aguadvances.bsky.social. eos.org/research-spo...
New research from @coreyjcochrane.bsky.social, @stevendvance.bsky.social, @lukeliuzzo.bsky.social in @aguadvances.bsky.social. eos.org/research-spo...
Jupiter’s Moon Callisto Is Very Likely an Ocean World - Eos
A closer look at previously disregarded observations reveals stronger evidence that a deep ocean lies beneath Callisto’s icy surface.
eos.org
February 18, 2025 at 5:11 PM
New results from several of my colleagues in the Planetary Interiors and Geophysics group at JPL (which we lovingly refer to as PIGS).
Reposted by Baptiste Journaux
This video by @hankgreen.bsky.social covers why the Galilean moons are so amazing. I love Pluto too, but #Io, #Europa, #Ganymede and #Callisto are top tier Solar System objects. 🧪🔭 #Astronomy #Science #Geology #PlanetaryScience #Space Shoutout to the Europa Clipper: science.nasa.gov/mission/euro...
You're Wrong About Pluto
YouTube video by hankschannel
youtu.be
February 12, 2025 at 6:23 PM
This video by @hankgreen.bsky.social covers why the Galilean moons are so amazing. I love Pluto too, but #Io, #Europa, #Ganymede and #Callisto are top tier Solar System objects. 🧪🔭 #Astronomy #Science #Geology #PlanetaryScience #Space Shoutout to the Europa Clipper: science.nasa.gov/mission/euro...
Something important to understand about how science is funded in the US
What’s the most expensive part of science grant budgets? People. Grants pay for the scientists, engineers, and technicians that make science happen. Cutting off existing grants doesn’t mean we can’t buy a beaker. It means we can’t pay rent.
January 31, 2025 at 3:05 PM
Something important to understand about how science is funded in the US
Reposted by Baptiste Journaux
What's it like presenting your research to 25,000 scientists?
ESS PhD student Haskelle White-Gianella shares an insider's view on her first AGU conference, what it's like giving a talk to the AGU scientific community, and making connections for her career and future as a planetary scientist! 🪐🌎
ESS PhD student Haskelle White-Gianella shares an insider's view on her first AGU conference, what it's like giving a talk to the AGU scientific community, and making connections for her career and future as a planetary scientist! 🪐🌎
UW College of the Environment Grad Student Experience at AGU24
YouTube video by UW College of the Environment
youtu.be
January 29, 2025 at 5:17 PM
What's it like presenting your research to 25,000 scientists?
ESS PhD student Haskelle White-Gianella shares an insider's view on her first AGU conference, what it's like giving a talk to the AGU scientific community, and making connections for her career and future as a planetary scientist! 🪐🌎
ESS PhD student Haskelle White-Gianella shares an insider's view on her first AGU conference, what it's like giving a talk to the AGU scientific community, and making connections for her career and future as a planetary scientist! 🪐🌎
Reposted by Baptiste Journaux
Inkcap is not a bad one, but I wish I was on the Hydnellum peckii server… 🍄🟫🦷
Did you know we're all placed onto different Bluesky servers, and they're named after mushrooms??
You can find out what mushroom server you're on by looking yourself up on Clearsky clearsky.app
I'm team oyster mushroom. 🦪🍄
You can find out what mushroom server you're on by looking yourself up on Clearsky clearsky.app
I'm team oyster mushroom. 🦪🍄
January 15, 2025 at 6:44 AM
Inkcap is not a bad one, but I wish I was on the Hydnellum peckii server… 🍄🟫🦷
Reposted by Baptiste Journaux
Elena & Topher now have a gofundme: gofund.me/153d27e6. Please help if you can!
January 10, 2025 at 8:51 PM
Elena & Topher now have a gofundme: gofund.me/153d27e6. Please help if you can!
Elena and Topher are amazing people and old friends from Seattle before they moved to California. If you can help, consider donating, they lost their house yesterday. What an horrible tragedy for so many folks.
My friends (and amazing planetary scientists / geologists) Elena & Topher Amador-French lost their home last night in the Eaton Fire. They had to flee with minutes warning. If you’re able, please donate to them and their family. Venmo: Elena-Amador.
January 9, 2025 at 4:21 AM
Elena and Topher are amazing people and old friends from Seattle before they moved to California. If you can help, consider donating, they lost their house yesterday. What an horrible tragedy for so many folks.
#2683
==--
Liquid's last refuge
One universal melting
Anchors life's promise
==--
See you in the woodlands in March!
==--
Liquid's last refuge
One universal melting
Anchors life's promise
==--
See you in the woodlands in March!
January 7, 2025 at 9:58 PM
#2683
==--
Liquid's last refuge
One universal melting
Anchors life's promise
==--
See you in the woodlands in March!
==--
Liquid's last refuge
One universal melting
Anchors life's promise
==--
See you in the woodlands in March!
Reposted by Baptiste Journaux
The cenotectic concept offers a new framework for assessing liquid stability on icy moons, aiding the search for life in extreme environments like Jupiter's Europa. doi.org/g8wf9t
Cenotectic concept redefines search for life on icy worlds
As NASA's Europa Clipper embarks on its historic journey to Jupiter's icy moon, Europa, Dr. Matt Powell-Palm, a faculty member at Texas A&M University's Department of Mechanical Engineering, has unveiled research that could transform our understanding of icy ocean worlds across the solar system.
phys.org
December 19, 2024 at 4:47 PM
The cenotectic concept offers a new framework for assessing liquid stability on icy moons, aiding the search for life in extreme environments like Jupiter's Europa. doi.org/g8wf9t
Incredibly excited to annonce the publication of our new experimental thermodynamic work at high pressures with the definition of a novel thermodynamic invariant point: The Cenotectic (κ)
nature.com/articles/s41...
nature.com/articles/s41...
On the equilibrium limit of liquid stability in pressurized aqueous systems - Nature Communications
The authors define the cenotectic — the low-temperature stability limit for a liquid under arbitrary thermodynamic conditions — and measure it for several aqueous solutions of relevance to extraterres...
nature.com
December 19, 2024 at 6:09 AM
Incredibly excited to annonce the publication of our new experimental thermodynamic work at high pressures with the definition of a novel thermodynamic invariant point: The Cenotectic (κ)
nature.com/articles/s41...
nature.com/articles/s41...
How big is Dragonfly? Bigger than most think! (At least me). Was able to hold one of the test blades, and visualize the full scale virtual model. It's close to the size of a mini-van / SUV. What an amazing mission!
November 14, 2024 at 4:49 PM
How big is Dragonfly? Bigger than most think! (At least me). Was able to hold one of the test blades, and visualize the full scale virtual model. It's close to the size of a mini-van / SUV. What an amazing mission!