Xavier Bonfils (now on BS)

CNRS astrophysicist at Institut de Planétologie et d'Astrophysique de Grenoble.

[UW–Madison Science @UWMadScience]

Planet GJ 3470 b is cool - literally and figuratively. New work from @tgbeatty on James Webb Space Telescope data shows exciting atmospheric chemistry that will help tease apart how the planet (and others like it) were created. #aas244 https://t.co/zAzmqknZLp

[Pierre Barthélémy @PasseurSciences]

Tristesse d'annoncer la disparition d'Hubert Reeves aujourd'hui. L'astrophysicien, merveilleux vulgarisateur, avait 91 ans. A lire sur @lemondefr
https://t.co/UvMHZD0K5s

[Xavier Bonfils (now on BS) @XavierBontweet]

@astrodave2 Yes, please, I'd like to visit the other place

[ESO @ESO]

@PlanetariumBO That's a good philosophical question 🧐 Also, if you look closely there's another telescope triplet not far from BlackGEM: ExTrA.

[Xavier Bonfils (now on BS) @XavierBontweet]

Having some time at La Silla Observatory with HARPS, NIRPS, ExTrA, and one of the most oversubscribed ESO instrument 🍦😋

[Nicola Astudillo-Defru @astrodillo]

🚨🚨 @ucscconcepcion invites ECR to apply for an ANID Fondecyt postdoctoral grant in observational astronomy hosted by UCSC🔭. Research topics: exoplanets, stellar activity, brown dwarfs, and science validation & verification of the Rubin Observatory🪐⭐️���. Please RT!

[João Alves @[email protected] @joaoalves]

This a reminder that Astronomy & Astrophysics (A&A) Letters are not only Open Access but free for all astronomers in the world. https://t.co/eze7CIQRx1

[Xavier Bonfils (now on BS) @XavierBontweet]

Today Julian Date is 2'460'000 🤩
Happy new ten thousand everyone !
🥳🍾🎉

[Cosmocité @Cosmocite_gre]

🚀 Cosmocité, un univers d’expériences 🌱

🏔️ Cet automne, un nouveau centre de sciences dédié aux sciences de l’Univers, de la Terre et de l’environnement ouvrira ses portes dans la Métropole de @GrenobleAlpes avec expos, planétarium, salle immersive

👩‍🚀 https://t.co/kJZ92R56wx

[Xavier Bonfils (now on BS) @XavierBontweet]

@gro_tsen @MonniauxD @ESO Haha 😆 Indeed ! And plenty other portraits in the room. Arago, Danjon, Laplace... Quite an impressive place really.

[Xavier Bonfils (now on BS) @XavierBontweet]

ELT model under the benevolent eye of Louis XIV ! 🙂
-- at Observatoire de Paris celebrating 60 years of @ESO 🥳

[Xavier Bonfils (now on BS) @XavierBontweet]

@JulienMilli @esa So cool ! 😎

But where is the @IPAG_fr badge on your space suit ?! 😅

[Xavier Bonfils (now on BS) @XavierBontweet]

Awesome ! 😎

Besides all the work done by Jose-Manuel, that beautiful plot owes to @rodluger and collaborators for their amazing _starry_ code 🙏

https://t.co/nYxc8nHBlE

[Astro Plot of the Week @PlotAstro]

We have the newest "Astro Plot of the Week" - congratulations!

And keep them coming!

[Xavier Bonfils (now on BS) @XavierBontweet]

TOI-3884 b also has a very high Transmission Spectroscopic Metric. It might become a great target for atmospheric studies with #JWST and ground-based high-dispersion spectroscopy. 💎🤩😁

[Xavier Bonfils (now on BS) @XavierBontweet]

Wow ! Weird light curves 🧐! @NASA_TESS, ExTrA/@IPAG_fr, @LCO_Global & ESPRESSO/@ESO detect a rare planet transiting a small, cool star with a giant spot 🤩. The spot-to-photosphere contrast is highly chromatic 🌈, and so are the transits 👍. Almenara+22 https://t.co/4SnCxxOEAg

[Xavier Bonfils (now on BS) @XavierBontweet]

TOI-3884 b —our new exoplanet— is 6x the size of Earth. It is quite unusual amongst other known exoplanets, and actually unique around such a small star.

[Xavier Bonfils (now on BS) @XavierBontweet]

Damned. You-know-who is buying it. 🤦
Any Twitter alternative to suggest ? 🤔

[Raphaël Enthoven @Enthoven_R]

Sommes-nous seuls dans l'univers ?
Et, franchement, serions-nous moins seuls si quelque chose vivait ailleurs ?
L'émission (excellente) est diffusée cette nuit à 2h45.
Ce qui est certain, c'est qu'on sera seuls à l'écran. 👍🏿
Mais elle est visible ici :
https://t.co/bY5gTVmnCJ

[Xavier Bonfils (now on BS) @XavierBontweet]

@LucieLeboulleux Mais est ce qu'on aura des lentilles de Fresnel dans les télescopes du futur !? 🤔🙂 #Nautilus https://t.co/O4z1uVNt5a

[Xavier Bonfils (now on BS) @XavierBontweet]

@thoeger or was it made for lunch ?🤔