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Julien Girard

@juliengirard.space
432 followers 380 following 110 posts

astronomer, scientist and coronagraphist at STScI, exoplanet portraitist, extreme turophile, father, grumpy urban farmer hobbyist he/him views EN FR ES my own linktr.ee/juliengirard 🦋 🐘 @djulik on 🦤

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Julien Girard @juliengirard.space · 17/09/2026
Hey Jonathan, happy to
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Space Telescope Science Institute @stsci.edu · 27/08/2026
NASA and SpaceX are targeting #NASARoman’s liftoff for no earlier than 7:26 a.m. EDT Sunday, August 30, from Launch Complex 39A at the agency’s Kennedy Space Center in Florida. 🎥 Launch coverage begins at 6:20 a.m. 🔭
nasa.gov
NASA Sets Coverage for Roman Space Telescope Launch from Florida - NASA
Coverage plans are ready for NASA's Nancy Grace Roman Space Telescope prelaunch and launch activities. Roman is NASA's next-generation observatory designed to
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Julien Girard @juliengirard.space · 12/05/2026
I probably hadn’t slept enough! 🤣
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Sarah E Moran @offallingstars.bsky.social · 29/04/2026
"We do what we can with the universe we've been given" (he was talking about direct imaging of exoplanets, but thta's some pretty profound and wide-ranging wisdom from @juliengirard.space at the BDExoCon meeting today)
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Julien Girard @juliengirard.space · 07/04/2026
So so so deserved, happy for you William @balmer.bsky.social !!
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Julien Girard @juliengirard.space · 07/04/2026
It’s really refreshing nowadays to hear the #artemis2 crew deliver humanist, universally good and sensible words while doing something extraordinary. The cognitive dissonance is real, what humanity can achieve and what humanity can destroy.
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Dr. Skylar Grayson @skylargrayson.bsky.social · 04/04/2026
NASA just dropped this image of Artemis II astronaut Christina Koch looking back at us. The first woman to ever see our planet in its entirety. I’m not crying you’re crying 🥹🔭🧪 📸: NASA
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Julien Girard @juliengirard.space · 07/04/2026
🤪
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Julien Girard @juliengirard.space · 25/03/2026
J’avoue, ça me fatigue
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American Astronomical Society (AAS) @aas.org · 25/02/2026
AAS President Dara Norman and Past President Kelsey Johnson published an opinion article in SpaceNews today titled "The future of astronomy is both on Earth and in space." The article is signed by 15 past, current, and incoming AAS presidents.
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Julien Girard @juliengirard.space · 23/02/2026
... before, kinda "every 10-ish years thing" but I didn't make it. 4 Months forwards, here it is, my new website is up and I geeked out a bit with github, html, AI... I wanted a single do it all html file and yet something that looked different than the templates almost everyone seemed to use 🙂 🫠 🙃
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Julien Girard @juliengirard.space · 23/02/2026
On October 19 2025 it was my 20th PhD anniversary, believe it or not, I may have well consumed a bit of the second part of my career. I didn't feel like celebrating or posting anything then. Meh, just another year. I had been meaning to update my professional website.... www.juliengirard.space
juliengirard.space
Julien H. Girard, astronomer, AURA Scientist at the Space Telescope Science Institute (STScI)
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Julien Girard @juliengirard.space · 13/01/2026
Enrique (lead author) and I met back in 2008 at a school in Mexida, Mexico! We finally have a paper together. Before exoplanets, my plan was to study active galactic nuclei with adaptive optics. 18 years later, I did it from space (unprecedented combination of sensitivity and spatial resolution).
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Julien Girard @juliengirard.space · 13/01/2026
Our "Unprecedented Look Into Heart of Circinus Galaxy", an AGN using JWST/NIRISS Aperture Masking Interferometry (AMI) mode. NASA @stsci.edu Press Release: science.nasa.gov/missions/web... Nature Comm. paper: www.nature.com/articles/s41... Props to Anand Sivaramakrishnan who did so much for AMI!
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Julien Girard @juliengirard.space · 13/01/2026
Enrique (lead author) and I met back in 2008 at a school in Mexida, Mexico! We finally have a paper together. Before exoplanets, my plan was to study active galactic nuclei with adaptive optics. 18 years later, I did it from space (unprecedented combination of sensitivity and spatial resolution).
lnkd.in
LinkedIn
This link will take you to a page that’s not on LinkedIn
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Julien Girard @juliengirard.space · 09/12/2025
Debris disk around TWA 20, a M star, imaged with JWST/NIRCam coronagraph at 2µm! Palatnick et al. 2025 arxiv.org/abs/2510.20216
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Julien Girard @juliengirard.space · 05/12/2025
Very true! We struggle to have more than one each year (too many meetings...) but we have a very large crowd each time and nice venues. The concentration of exoplanet scientists in PA/DE/MD/DC/VA is amazing, similar to California's It's one full Friday, informal, no fee, a amazing platform for ECRs
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Julien Girard @juliengirard.space · 05/12/2025
The CHesapeake bay area EXOplanet Meeting #CHEXO12 has started @jhuapl.bsky.social with a nice and big crowd despite the snow! www.chexo.org #exoplanets
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Julien Girard @juliengirard.space · 12/11/2025
Good news! En hora buena! I know this is probably not the time yet but choosing Tenerife (or even Madrid or Barcelona) for Spanish HQ would be wise, more attractive for scientists, engineers, staff and their families :) No offense for Santa Cruz de La Palma, looks beautiful!!
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Julien Girard @juliengirard.space · 11/11/2025
And on Keswick Rd yet again. I guess it’s wind + dry weather + leaves + restarting furnaces ???
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Julien Girard @juliengirard.space · 11/11/2025
But Y? Y 2.02K
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Kevin Hainline @kevinhainline.bsky.social · 11/11/2025
this is from a paper I'm putting together of a 300 K brown dwarf and it's kind of insane how similar it is
a chart showing the flux from a Y dwarf as a function of wavelength, with a picture of the little brown dwarf in the top right (it looks like a rose), and the 1D and 2D spectra underneath. It rises only at longer wavelengths. It looks a lot like this chocolate price chart.
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Julien Girard @juliengirard.space · 05/11/2025
Jupiter aurora movie by JWST NIRCam! www.youtube.com/watch?v=b1Fo...
youtube.com
Wow! Jupiter's auroras captured by the James Webb Space Telescope
YouTube video by VideoFromSpace
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Julien Girard @juliengirard.space · 29/10/2025
oops, that's next year for you and I
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Julien Girard @juliengirard.space · 29/10/2025
youngster (András)
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Max Planck Institute for Extraterrestrial Physics @mpe-garching.bsky.social · 21/10/2025
🤩The @4most-eu.bsky.social (#4MOST) facility on @eso.org VISTA telescope in Chile achieved first light. #MPE scientists played a leading role in developing the Operations System, enabling to link #eROSITA’s X-ray universe with large-scale structure of galaxies. ➡️ More: www.mpe.mpg.de/8102833/news...
mpe.mpg.de
4MOST Begins its Journey of Cosmic Discovery
4MOST embarks on a cosmic journey, capturing spectra of thousands of celestial objects simultaneously, unlocking secrets of the universe.
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4-meter Multi-Object Spectroscopic Telescope (4MOST) @4most-eu.bsky.social · 21/10/2025
First Light for 4MOST! The 4-metre Multi-Object Spectroscopic Telescope (4MOST) has captured its very first spectra! Video Credit: AIP/R. de Jong, AIP/K. Riebe, AIP/A. Saviauk, CRAL/J.-K. Krogager
youtu.be
First Light for 4MOST!
YouTube video by 4-meter Multi-Object Spectroscopic Telescope
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Julien Girard @juliengirard.space · 14/09/2025
Love the 2b_or_not_2b repo!!
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Julien Girard @juliengirard.space · 11/09/2025
that's wild, literally .
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Matthew Kenworthy @mattkenworthy.bsky.social · 09/09/2025
Two papers announcing the discovery of a directly imaged 6 Jupiter mass planet around binary system HD 143811 AB Squicciarini+ and Jones+ in Sco-Cen - Keck, Gemini and VLT all imaging this companion and confirmed with several years of common proper motion. #astrodon #exoplanet #exosci
Figure from Squicciarini et al. showing three panels with a white dot on a black and blue stippled background, indicating the location of the planet in GPI and SPHERE IRDIS data.&10;Three panel image from Jones et al. showing a white dot on a stippled background. The planet is in the 11 o'clock position in all three images.
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Meg Schwamb @megschwamb.bsky.social · 25/08/2025
JWST successfully observed interstellar object (ISO) 3I/ATLAS. Interesting results. The composition of the coma could be due to a few different scenarios. Additional JWST observations of the object closer to the sun are needed. science.nasa.gov/blogs/3iatla...
science.nasa.gov
NASA’s Webb Space Telescope Observes Interstellar Comet - NASA Science
NASA’s James Webb Space Telescope observed interstellar comet 3I/ATLAS Aug. 6, with its Near-Infrared Spectrograph instrument. The research team has been
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Julien Girard @juliengirard.space · 26/08/2025
Amazing!!!! A NEW gap-carving planet! So far, we haven't been able to image many. WISPIT 2b, like PDS 70 b&c is imaged at many wavelengths from 656nm (H⍺, blue here) to 3.7µm (👏MagAO-X @xwcl.science.web.brid.gy). VLT/SPHERE polarized scattered light at 1.6µm+reddish planet at 2.2µm in the gap, wow!
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SETI Institute @setiinstitute.bsky.social · 08/08/2025
Next #SETILive: Closest Exoplanet Yet? TODAY, 8 August, 3:15 pm PDT Join astronomers @allplanets.bsky.social and Julien Girard (STScI) as they discuss recent evidence of a Saturn-mass gas giant orbiting Alpha Centauri A—located just 4 light-years away. 🧪 🔭 WATCH LIVE: buff.ly/TplMAD5
SETI Live record button logo. Text: Closest Exoplanet Yet? with Franck Marhis and Julien Girard. Background: Artist's concept of a gas giant planet orbiting at a distance from a bright star. Inset: Photos of Franck Marchis and Julien Girard.
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Julien Girard @juliengirard.space · 07/08/2025
Wow, Tonight I just completed 8 years @stsci.edu. I love it 😊 I realize I now have worked there in Baltimore as much as I spent @eso.org in Chile. 16 years as scientist, collectively supporting instruments, operations, maximizing the science return at major observatories, ground and space!
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Kelly Lepo @kellylepo.bsky.social · 01/08/2025
The Space Telescope Science Institute's MAST archive contains 300 million astronomical observations from over 23 different missions. Here is an animation showing how the archive has built up over time. Credit: Julie Imig, STScI
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Julien Girard @juliengirard.space · 29/07/2025
Experiencing FOMO big time, not attending #HWO2025) I am glad a lot is youtube broadcasted. I am especially eager to watch these panels sessions on ground/based synergies and on how the #RomanCoronagraph will inform the design choices of the HWO coronagraphs www.youtube.com/watch?v=7Vq3...
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Julien Girard @juliengirard.space · 23/07/2025
Who saw this coming? Maybe that should go into the discussion of what @eso.org will do after it's ELT, an ELT-N with a TMT design? I think as a community what we all want is A >25m telescope in the North.
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Julien Girard @juliengirard.space · 23/06/2025
"This is just a small peek" In 9 hours, livestream!
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Julien Girard @juliengirard.space · 10/06/2025
Habemus CSIT for the Habitable Worlds Observatory (HWO) science.nasa.gov/astrophysics...
science.nasa.gov
Habitable Worlds Observatory News - NASA Science
Building on the foundation of the Habitable Worlds Observatory (HWO) Technology Maturation Project Office (TMPO), NASA is now establishing the HWO Community
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Julien Girard @juliengirard.space · 10/06/2025
Please watch the @aas.org Press Conference where @balmer.bsky.social presented this thrilling result: THE NEW(even if expected from astrometry)LY IMAGED, COLD (~2ºC), MATURE giant exoplanet 14 Her c with JWST/NIRCam!!! Congrats Daniella, William and the whole team 😀 www.youtube.com/live/Z7niXAH...
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Matthew Kenworthy @mattkenworthy.bsky.social · 10/06/2025
Dr. Kielan Hoch has a #Nature paper on #JWST observations of the star YSES 1 with its two gas giant planets. She and her team have discovered a circumplanetary disk around the larger 1b and silicate clouds in 1c. Wonderful results and more to come - watch this space! #exoplanet #astrodon
The two gas giant planets YSES 1b has a circumplanetary disk surrounding a purple coloured visualisation of the gas giant, and a sandy coloured gas giant 1c in the lower right. The star can be seen in the distance. The image is by Ell Bogat at UMD.
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Julien Girard @juliengirard.space · 15/05/2025
Congrats Yoni!!!
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Julien Girard @juliengirard.space · 14/05/2025
Chen Xie, Christine Chen et al., colleagues of our EPSIG group at STScI/JHU just published water ice detections with #HighContrast Near-Infrared (IFU) Spectroscopy with #JWST/NIRSpec!!
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Julien Girard @juliengirard.space · 09/04/2025
Punchline Queen
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Julien Girard @juliengirard.space · 27/03/2025
Je suis curieux des propositions et mécanismes pour accueillir (attirer?) des chercheurs/scientifiques en France et en Europe. Comment le faire sans revaloriser les chercheurs en France? A 50% du salaire US, je prends! À 25%, non.
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Julien Girard @juliengirard.space · 26/03/2025
Actually with captions
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Julien Girard @juliengirard.space · 26/03/2025
I could not help it… (note, the top picture was taken in Jura, France by the weather forecast group a météo franc-comtoise)
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Julien Girard @juliengirard.space · 25/03/2025
We'll be presenting this Coronagraphy JWebbinar with Aarynn Carter and Jonathan Aguilar, register here before March 30 if you're interested. #JWST #Coronagraph www.stsci.edu/jwst/science... under 2025, it's number 40
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JWST Observer @jwstobserver.bsky.social · 24/03/2025
A new series of python-based Jupyter notebooks are now available for all four #JWST instruments and 13 observing modes. Read more: ow.ly/bjZ850VnlG8
Line drawing of JWST on a composite background of the Cosmic Cliffs observed by JWST
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Julien Girard @juliengirard.space · 25/03/2025
Well deserved on bsky as well, congrats!!
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