Tessera
Folgen

Julien Girard

@juliengirard.space

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

109 Posts427 Follower380 Folgt
Julien Girard@juliengirard.space · 4mo ago

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.

𝕊𝕒𝕝𝕥𝕪𝔹𝕚𝕥𝕔𝕙𝕒𝕓𝕝𝕖𝕤@saltybitchables.bsky.social · 4mo ago

I just saw this. Artemis II astronaut Reid Wiseman named a newly discovered moon crater after his late wife, Carroll, who died in 2020 following a 5-year battle with cancer. #ProudBlue #ArtemisII

American Astronomical Society (AAS)@aas.org · 6mo ago

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.

SpaceNews @spacenewsinc.bsky.social · 6mo ago

The future of astronomy is both on Earth and in space A recent SpaceNews opinion article argued that it is time to “take astronomy off Earth.” The suggestion is straightforward: If satellite constellations and commercial space activity threaten ground-based astronomy, perhaps astronomers should…

Julien Girard@juliengirard.space · 8mo ago

Debris disk around TWA 20, a M star, imaged with JWST/NIRCam coronagraph at 2µm! Palatnick et al. 2025 arxiv.org/abs/2510.20216

Umberto gaetani@umbertogaetani.mastodon.uno.ap.brid.gy · 9mo ago

Le osservazioni del JWST scoprono un grande disco di detriti attorno a una vicina stella nana M #webb @astronomia Un team internazionale di astronomi ha utilizzato il James Webb Space Telescope (JWST) per osservare una stella nana rossa vicina, nota come TWA […] [Original post on mastodon.uno]

Immagine deconvoluta del disco di detriti di TWA 20 nel filtro F200W, ottenuta eseguendo una routine di deconvoluzione sul risultato MCRDI. L’immagine è ruotata con il Nord verso l’alto.
Julien Girard@juliengirard.space · 9mo ago

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!!

Jackie Barrientes@barrientes.bsky.social · 9mo ago

TMT International Observatory LLC will jointly develop with the Ministry of Science, Innovation and Universities a detailed roadmap toward the potential realization of the TMT at the Observatorio del Roque de los Muchachos (La Palma, Spain).

Julien Girard@juliengirard.space · 9mo ago

Jupiter aurora movie by JWST NIRCam! www.youtube.com/watch?v=b1Fo...

Wow! Jupiter's auroras captured by the James Webb Space Telescope

YouTube video by VideoFromSpace

youtube.com

Space Telescope Science Institute@stsci.edu · 9mo ago

In 2023, #NASAWebb observed a spectacular light show on Jupiter, the largest planet in our solar system. The planet’s auroras are hundreds of times brighter and more energetic than Earth’s. Credit: NASA, ESA, CSA, J. Nichols (University of Leicester), M. Zamani (ESA/Webb). 🔭 🧪

Max Planck Institute for Extraterrestrial Physics@mpe-garching.bsky.social · 10mo ago

🤩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...

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.

mpe.mpg.de

Meg Schwamb@megschwamb.bsky.social · 12mo ago

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...

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

science.nasa.gov

Julien Girard@juliengirard.space · 12mo ago

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!

Matthew Kenworthy@mattkenworthy.bsky.social · 12mo ago

Proud supervisor moment: #LeidenObservatory graduate student Richelle van Capelleveen led one of two papers on our discovery of WISPIT 2b, a 5 Jupiter mass exoplanet clearing a path in a circumstellar disk. Laird Close and his team saw it in H-alpha, indicating gas accretion #astrodon 🔭 🧪

A series of concentric black and white ovals against a black background, with a dim red dot in the lower left of one of the paths of a black ring. The ovals are dust rings around a young star, and the red dot is a 5 Jupiter mass exoplanet called WISPIT 2b.
Julien Girard@juliengirard.space · last yr.

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!

Kelly Lepo@kellylepo.bsky.social · last yr.

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

Dr. Scott W. Fleming@scottwfleming.bsky.social · last yr.

Ever wondered what the "MAST Sky" looks like, from our ~6 PB of data spanning 3 decades...check this out! spacetelescope.github.io/mast-blog/ma... Really fun project led by the very talented Julie Imig at MAST, showing mission coverage sky-projected! They make VERY good video backgrounds, btw. 🔭

MAST background in "standard" sky projection, in hues of blue. Lighter blue areas mark lots of observations, while darker areas are less. Numerous patterns are visible, like the continuous viewing zones as ovals in the lower-left and upper right, patterns from overlapping TESS FFIs, or the Kepler footprint shapes stamped along the ecliptic and in the original Kepler field in the upper-right.
Julien Girard@juliengirard.space · last yr.

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...

Space Telescope Science Institute@stsci.edu · last yr.

STScI Director Dr. Jennifer Lotz (left) moderates a panel on observatory synergies at the Habitable Worlds Observatory conference today in Washington, D.C. #HWO2025 #HWO25 🔭 🧪 ☄️

Three people participating in a panel discussion at a conference, seated at a table with microphones in front of each person.
Julien Girard@juliengirard.space · last yr.

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...

Bild
Space Telescope Science Institute@stsci.edu · last yr.

NEWS: #NASAWebb has directly imaged a cold exoplanet in an extremely misaligned orbit for the first time. The observations have surprised researchers in more than one way: webbtelescope.pub/3ZSctun #AAS246 🔭 🧪

This image shows the exoplanet 14 Herculis c. The view is mostly black, with very faint red splotches in the central region of the image. At the center of the image, there is a black circle, and in the center of that, there is a star symbol representing a real star. This black circle blocks the light from the host star. To the lower right of the circle is a fuzzy bright orange circle, which is the exoplanet.
Julien Girard@juliengirard.space · last yr.

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!!

Space Telescope Science Institute@stsci.edu · last yr.

NEW: Is frozen water around other stars? #NASAWebb provided proof for the first time: It is! Webb identified water ice around HD 181327, a Sun-like star that lies 155 light-years away. The majority is found where it’s coldest—farthest from the star: webbtelescope.pub/42Vopw0 🔭 🧪

An illustration of Sun-like star HD 181327 and its surrounding debris disk. The star is at top right. It is surrounded by a far larger debris disk that forms an incomplete ellpitical path and is cut off at right. There’s a huge cavity between the star and the disk. The debris disk is shown in shades of light gray. Toward the top and left, there are finer, more discrete points in a range of sizes. The disk appears hazier and smokier at the bottom. The star is bright white at center, with a hazy blue region around it. The background of space is black. The label Artist's Concept appears at lower left.