Emmanuel Marcq
@marcqplanets.bsky.social
Planetary Atmospheric Scientist (esp. #Venus, sometimes Venus-like #exoplanets). Teaching Physics and Astrophysics at Université de Versailles Saint-Quentin. Easily enthusiastic about many things though! Also on Twitter (for now): @MarcqPlanets
Je crois que c'est fait exprès pour ne pas en plus blesser le cycliste en cas (fréquent) de choc.
November 19, 2025 at 11:21 AM
Je crois que c'est fait exprès pour ne pas en plus blesser le cycliste en cas (fréquent) de choc.
Il l'est en effet.
November 12, 2025 at 9:18 PM
Il l'est en effet.
C'est en gros cela. Ça fait d'ailleurs un joli exercice en L3 : pour un matériau donné, calculer la hauteur de la montagne la plus haute possible sur un corps sphérique, et si la hauteur de cette montagne est de l'ordre du rayon du corps, alors ça n'est plus une sphère...
November 12, 2025 at 8:26 AM
C'est en gros cela. Ça fait d'ailleurs un joli exercice en L3 : pour un matériau donné, calculer la hauteur de la montagne la plus haute possible sur un corps sphérique, et si la hauteur de cette montagne est de l'ordre du rayon du corps, alors ça n'est plus une sphère...
Sure, but ultimately don't we need language to talk about physics? Return to step one...
November 10, 2025 at 10:06 AM
Sure, but ultimately don't we need language to talk about physics? Return to step one...
Alors que tout le monde sait que c'est 1,22 λ/D :-P #BesselPower
November 4, 2025 at 10:26 AM
Alors que tout le monde sait que c'est 1,22 λ/D :-P #BesselPower
Autre hypothèse (optimiste, donc peu crédible) : les gens en général ont davantage de goût en musique que dans les arts visuels, et donc les IA ne sont pas (encore)au niveau où elles peuvent faire illusion.
October 30, 2025 at 2:41 PM
Autre hypothèse (optimiste, donc peu crédible) : les gens en général ont davantage de goût en musique que dans les arts visuels, et donc les IA ne sont pas (encore)au niveau où elles peuvent faire illusion.
Je crois que ça se manifeste aussi (surtout ?) par des "artistes virtuels" qui mettent en ligne "leurs" compositions sur les plate-formes usuelles style Spotify (et se financent ainsi comme n'importe quel autre artiste).
October 30, 2025 at 2:40 PM
Je crois que ça se manifeste aussi (surtout ?) par des "artistes virtuels" qui mettent en ligne "leurs" compositions sur les plate-formes usuelles style Spotify (et se financent ainsi comme n'importe quel autre artiste).
That's still 16 orders of magnitude below the total mass energy content of the matter in the observable universe. Puny!
October 25, 2025 at 11:01 AM
That's still 16 orders of magnitude below the total mass energy content of the matter in the observable universe. Puny!
Reposted by Emmanuel Marcq
« the museum, which is part of the Sorbonne university » la presse étrangère confuse face à l’imbroglio de l’ESR français
October 21, 2025 at 10:54 AM
« the museum, which is part of the Sorbonne university » la presse étrangère confuse face à l’imbroglio de l’ESR français
It's in the wikipedia article (the initial meaning has shifted from your "nilium" proposal to "stable high-pressure neutronic phase").
And I don't know enough about QCD and QED to give a meaningful answer to your second question :-P
And I don't know enough about QCD and QED to give a meaningful answer to your second question :-P
October 3, 2025 at 5:17 PM
It's in the wikipedia article (the initial meaning has shifted from your "nilium" proposal to "stable high-pressure neutronic phase").
And I don't know enough about QCD and QED to give a meaningful answer to your second question :-P
And I don't know enough about QCD and QED to give a meaningful answer to your second question :-P
"Born too late, in a world too old"
en.wikipedia.org/wiki/Neutron...
"The word [neutronium] was coined (...) for the hypothetical "element of atomic number zero" (with no protons in its nucleus) that he placed at the head of the periodic table (denoted by -)."
en.wikipedia.org/wiki/Neutron...
"The word [neutronium] was coined (...) for the hypothetical "element of atomic number zero" (with no protons in its nucleus) that he placed at the head of the periodic table (denoted by -)."
Neutronium - Wikipedia
en.wikipedia.org
October 3, 2025 at 3:19 PM
"Born too late, in a world too old"
en.wikipedia.org/wiki/Neutron...
"The word [neutronium] was coined (...) for the hypothetical "element of atomic number zero" (with no protons in its nucleus) that he placed at the head of the periodic table (denoted by -)."
en.wikipedia.org/wiki/Neutron...
"The word [neutronium] was coined (...) for the hypothetical "element of atomic number zero" (with no protons in its nucleus) that he placed at the head of the periodic table (denoted by -)."
Sure, it implies that internal heat flux has dropped below ~1 W/m² before the end of theircsimulations, so that convection could shut down.
September 11, 2025 at 3:04 PM
Sure, it implies that internal heat flux has dropped below ~1 W/m² before the end of theircsimulations, so that convection could shut down.
In Selsis et al. (2023), they show that if the internal heat flux at the lower boundary is strong enough (in excess of a few W/m²), then convection is restored in the deepest layers and surface temperature rises. Not sure it is considered yet by Pélissard et al.
September 11, 2025 at 2:53 PM
In Selsis et al. (2023), they show that if the internal heat flux at the lower boundary is strong enough (in excess of a few W/m²), then convection is restored in the deepest layers and surface temperature rises. Not sure it is considered yet by Pélissard et al.
If designed to play on Earth, it would likely be wildly out of tune in the heavier atmosphere. Before melting away from the acidity and the heat, of course.
September 10, 2025 at 6:45 AM
If designed to play on Earth, it would likely be wildly out of tune in the heavier atmosphere. Before melting away from the acidity and the heat, of course.
A choice we discussed with colleagues would be to name the rooms after stars of different sizes: "I'm going to see Venus talks in the Betelgeuse room", "Rendez-vous to a small workshop in Proxima", etc. That would still shout "Science!" while dispelling the confusion.
September 9, 2025 at 12:54 PM
A choice we discussed with colleagues would be to name the rooms after stars of different sizes: "I'm going to see Venus talks in the Betelgeuse room", "Rendez-vous to a small workshop in Proxima", etc. That would still shout "Science!" while dispelling the confusion.