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Dr. Stéphanie Juneau

@stephajuneau.bsky.social

Astrophysicist, supermassive black hole hunter, artist, public speaker, français/English/québécois

19 Posts544 Follower 270 Folgt

NSF-Simons AI Institute for Cosmic Origins (CosmicAI)@nsfsimonscosmicai.bsky.social · 2w ago

Grad Certificate in AI/ML + Astrophysics-AI Badge - Spring 2027 apps open! CosmicAI x UT Austin CDSO 12 credits, 100% online Priority deadline Aug 1, final Sept 1. Scholarships avail for early-career researchers. form.jotform.com/261535798839... Apply cdso.utexas.edu/caiml @thenrao.bsky.social

Bill Keel @ngc3314.bsky.social · 2mo ago

Reasons to continue Hubble operations in the era of JWST, Rubin, Roman... one of the white papers from the community. arxiv.org/abs/2410.011...

We Must Preserve Hubble given its Unique Complementarity to Webb, Roman, and Euclid

We present compelling arguments -- focusing on galaxy science -- for preserving the main imagers and operational modes of the Hubble Space Telescope (HST) for as long as is technically feasible, to as...

arxiv.org

anil oza @aniloza.bsky.social · 3mo ago

wow — the preprint host, arxiv, is banning authors for a year if they submit papers with hallucinated citations 🤖

Twitter thread from Thomas Dietterich, reading "Attention
@arxiv
authors: Our Code of Conduct states that by signing your name as an author of a paper, each author takes full responsibility for all its contents, irrespective of how the contents were generated. 1/
3:03 PM · May 14, 2026
·
66.7K
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Thomas G. Dietterich
@tdietterich
·
1h
If generative AI tools generate inappropriate language, plagiarized content, biased content, errors, mistakes, incorrect references, or misleading content, and that output is included in scientific works, it is the responsibility of the author(s). 2/
Thomas G. Dietterich
@tdietterich
·
1h
We have recently clarified our penalties for this. If a submission contains incontrovertible evidence that the authors did not check the results of LLM generation, this means we can't trust anything in the paper. 3/
Thomas G. Dietterich
@tdietterich
·
1h
The penalty is a 1-year ban from arXiv followed by the requirement that subsequent arXiv submissions must first be accepted at a reputable peer-reviewed venue. 4/
Thomas G. Dietterich
@tdietterich
·
1h
Examples of incontrovertible evidence: hallucinated references, meta-comments from the LLM ("here is a 200 word summary; would you like me to make any changes?"; "the data in this table is illustrative, fill it in with the real numbers from your experiments") end/"

Helen Branswell 🇨🇦@helenbranswell.bsky.social · 3mo ago

I find this unsettling: A new study in #Lancet shows that the number of faux citations in scientific articles is on the rise, and #AI is likely to blame. @aniloza.bsky.social reports. www.statnews.com/2026/05/07/l...

Dr. Stéphanie Juneau @stephajuneau.bsky.social · 3mo ago

My colleague Robert Nikutta, PI of @astrodatalab.bsky.social and I are thankful for the opportunity to write a @jupyter.org blog post on how we’re using Jupyter for astronomy science platforms! Get in touch if you have questions 🧪🔭⭐️

Project Jupyter@jupyter.org · 4mo ago

Exploring Petabytes of the Night Sky in Jupyter 🌌 In this Jupyter blog guest post, Robert Nikutta and Stéphanie Juneau from NSF NOIRLab, show how Jupyter enables thousands of astronomers to effectively work with large-scale data on the NOIRLab’s Astro Data Lab Science Platform. bit.ly/3QprZfq

Corey S. Powell @coreyspowell.bsky.social · 3mo ago

A lot of discoveries begin with "huh, that's weird." Astronomers noticed a weird dark patch at the center of this galaxy. Now it seems the void is caused by a record-breaking pair of ultramassive black holes that cleared out all the surrounding stars. 🧪🔭 www.sciencenews.org/article/larg...

Multiwavelength observations of the central galaxy in A402. Left: three-color image of the cluster core based on data from HST and JWST (north is up, east is left). Upper right: zoom-in of the inner 2″ × 2″ of the central galaxy in A402. This zoomed image reveals a 0
25 wide cavity in surface brightness, as well as a bright point source on the western edge of the depression.

Dr. Stéphanie Juneau @stephajuneau.bsky.social · 3mo ago

Not sure how well this posts but here’s an IG reel of my latest #printmaking project! Pincushion cactus print. It took a long time to cut up my carved linoleum block to make the puzzle pieces + inking the flowers is challenging but each print is unique! 🌺 #sciart www.instagram.com/reel/DYHiJ4t...

Instagram

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instagram.com

Dr. Stéphanie Juneau @stephajuneau.bsky.social · 3mo ago

Had a fulfilling, fun visit at the Univ of Wyoming to give their astronomy colloquium and meet with students & faculty. Got to see the lucky T-rex — students throw pine cones in its mouth for "good luck" on their exams😂. Thanks to Yufeng for the invitation and showing me a glimpse of the landscape!

Physical Sciences building on the University of Wyoming campus, built in late 60s with warm colored sandstone.

Me with my long brown hair and gray sport coat in front of tall T-rex statue with pinecones in its mouth.

Woman with long brown hair and gray jacket and pants standing on hiking trail in grassy hilltop landscape under moody grey clouds but pre-sunset warm glow low on horizon.

Jason Wright @astrowright.bsky.social · 3mo ago

Not-so-breaking news: Phobos is a rock and not a space station. Neat work by Winter Parts using REBOUND to illustrate the old (disproven) hypothesis that Phobos's anomalous orbit was due to atmospheric drag because it is hollow! iopscience.iop.org/article/10.3...

Phobos is not Hollow

Phobos is not Hollow, Parts, Winter, Wright, Jason T.

iopscience.iop.org

US National Gemini Office @usngo.bsky.social · 3mo ago

This week’s image is of NGC 6302! Gemini South’s GMOS was used to image this planetary nebula, also known as the Butterfly Nebula. Check out the 🧵 for another paper using GMOS data! #Astronomy 📸 credit in thread

A high-contrast image of the Butterfly Nebula (NGC 6302) against a dark, star-filled sky. The nebula features two sprawling, asymmetrical “wings” of gas and dust extending from a central bright core. The wings transition from a glowing, white, and pale blue near the center to deep, fiery streaks of red and orange at the outer edges.

Daniel | ScienceSocks et al.@sciencesocks.bsky.social · 3mo ago

The #Hubble space telescope turned 36 today! Happy birthday! 🥳 Three and a half decades of cosmic beauty, including a certain Pillars of Creation that may or may not have been photoshopped 👀 🔭🐡🧪🎨

Hubble's iconic Pillars of Creation image showing three towering columns of dust and gas in the Eagle Nebula, with three pairs of googly eyes stuck on top of each pillar.

Katie Mack @astrokatie.com · 4mo ago

The whole-Earth-at-night photo from the #Artemis II mission was brighter than many expected. That was mostly due to camera settings; here’s another pic taken just before with diff settings. Digital photography is always subjective—even before processing! (HT @swapnakrishna.com @jasonc0.bsky.social)

An image of the entire Earth, with Northern Africa and the North Pole visible at the lower left. It looks like daytime but it is actually illuminated by moonlight. There’s a bright arc along the lower right where the sun is coming through from behind. There’s a bright dot on the lower right (Venus) and a glow (zodiacal light). A few stars can be seen in the dark beyond the Earth.

An image of the entire Earth, with Northern Africa and the North Pole visible at the lower left. It is dark with muted colors. There’s a very bright arc along the lower right where the sun is coming through from behind. There’s a small dot on the lower right (Venus). The background is dark with a few faint stars visible.

NSF-Simons AI Institute for Cosmic Origins (CosmicAI)@nsfsimonscosmicai.bsky.social · 4mo ago

Dr. John Wu, PhD, Associate Astronomer and the Applied AI Scientist at the Space Telescope Science Institute, presenting his talk "Short Stories of AI in, and for, Astronomy" at our hybrid seminar series! To sign up for future seminars, join our email list cosmicai.org/get-involved

NSF-Simons AI Institute for Cosmic Origins (CosmicAI)@nsfsimonscosmicai.bsky.social · 9mo ago

It’s official, our panel "Revolutionizing Astronomy with Next Generation Big Data" has been accepted to @sxsw.com 2026! Thank you to everyone who supported our work! Panelists: Stella Offner, Paul Torrey, @stephajuneau.bsky.social, & @niall2.bsky.social Learn more schedule.sxsw.com/events/PP116...

Dr. Stéphanie Juneau @stephajuneau.bsky.social · 9mo ago

In honor of Frida Kahlo, her mesmerizing work, her inspiring strength and her impactful journey 💚 #halloween #Frida #art #painter

Woman disguised as a Frida Kahlo self-portrait with make-up, crown of flowers, hand-shaped earrings and with a wooden picture frame hanging around the head and neck. Background is a brick wall.

Same as previous except with a different background. Woman disguised as a Frida Kahlo self-portrait with make-up, crown of flowers, hand-shaped earrings and with a wooden picture frame hanging around the head and neck. Background is the actual painting with foliage and dark clouds within the frame and just plain green and white outside the frame, giving the impression that the Frida portrait is coming to life.

Dressed as Frida Kahlo with the background from her painting: "Self portrait dedicated to Dr. Eloesser"

Original painting by Frida Kahlo: "Self portrait dedicated to Dr. Eloesser" used as a reference for the recreation

Astro Data Lab @astrodatalab.bsky.social · 10mo ago

The first annual Astro Data Lab user survey closes tomorrow, September 30. If you haven’t already, please fill it out to help shape the future of the Data Lab! 👉 User Survey: datalab.noirlab.edu/usersurvey #astronomy 🔭

Astro Data Lab annual user survey 2025

Thank you for participating in the first annual user experience survey of the Astro Data Lab science platform. Your answers are collected anonymously, i.e., we are not linking your responses to any pe...

datalab.noirlab.edu

Astro Data Lab@astrodatalab.bsky.social · 11mo ago

Your opinion matters! We invite current and future users of Astro Data Lab to take the first User Survey. Please help us shape our future development! 👉 User Survey: datalab.noirlab.edu/usersurvey #astronomy 🔭

NSF-Simons AI Institute for Cosmic Origins (CosmicAI)@nsfsimonscosmicai.bsky.social · 10mo ago

Exciting news! Introducing AstroVisBench: A Code Benchmark for Scientific Computing and Visualization in Astronomy! A new benchmark developed by researchers at the NSF-Simons AI Institute for Cosmic Origins is testing how well LLMs implement scientific workflows in astronomy and visualize results.

Matthew Kenworthy @mattkenworthy.bsky.social · 11mo ago

My periodic reminder for #astrosci #astrodon #exoplanets Early Career Researchers to please, please, please have a simple web site with your current email address on it - rationale here: kenworthy.space/advice/

A pen sketch of a web page for an astronomer, showing name, email, optional phone number, and professional contact details, with a one sentence summary of their research and an ADS link.

Dr. Stéphanie Juneau @stephajuneau.bsky.social · 11mo ago

If you have a few mins and have used (or you're thinking about using) the Astro Data Lab, our team would love to hear from you!

Astro Data Lab@astrodatalab.bsky.social · 11mo ago

NSF-Simons AI Institute for Cosmic Origins (CosmicAI)@nsfsimonscosmicai.bsky.social · 12mo ago

Vote to bring our panel “Revolutionizing Astronomy + AI with Next Generation Big Data” to SXSW! Register for a SXSW account & vote by clicking the heart ❤️ - open now til Aug 24! participate.sxsw.com/flow/sxsw/sx... @stephajuneau.bsky.social @niall2.bsky.social

PanelPicker | SXSW Conference & Festivals

PanelPicker® is the official SXSW user-generated session proposal platform. Enter ideas and vote to help shape Conference programming for SXSW and SXSW EDU.

participate.sxsw.com

Dr. Stéphanie Juneau @stephajuneau.bsky.social · last yr.

Yay! Now I'm allowed to reveal that DESI found stronger constraints toward evolving dark energy. It's not quite at the five sigma level yet but may have "major implications for our understanding of the nature and fate of our universe" 🚀🔭

DESI Survey@desisurvey.bsky.social · last yr.

JUST RELEASED: DESI DR1 & BAO RESULTS FROM DR2🌌

Dr. Stéphanie Juneau @stephajuneau.bsky.social · last yr.

🔭 OK so I'm not allowed to reveal the details yet but we have some exciting press releases coming up in a few hours (watch this space: @desisurvey.bsky.social) including a data release that I've been working on for MONTHS and I'm just here on the verge of tears 😭 #astronomy #data #treasure

Montage with photos of the Mayall 4-meter telescope and a selfie in front of it.

Portrait of astronomer Stephanie Juneau in front of the Mayall telescope dome in the background. By photographer Jesse Rieser

Catherine 🌌@catieslaughts.bsky.social · last yr.

🔭 Crowdsourcing here a little: Astro folks! Do you have a favorite online resource/publication for astronomy info to share with the general public? I have a science museum volunteer who's interested in updating the sources they share with folks who want to learn more, and astrobites is my default

Brett Morris @brettmorr.is · last yr.

We can't make @astropy.org better for you without knowing a bit about what you need and who you are. Tell us! The Astropy Project will make informed decisions with your input. 🔭🧪

astropy@astropy.org · last yr.

The Astropy Project is made by our community, for our community. But who are we, exactly? We want *your* input in the first astropy user survey: forms.gle/KX2cNuFsQYgV... Share how you use astropy, how to improve it, and how we can support you and your work! 🧪🔭

Heidi B. Hammel @hbhammel.bsky.social · last yr.

Image by Michael Carroll shows some asteroids to scale. We did NOT see the little one coming & it hit Earth above Chelyabinsk in 2013, injuring >1400 people. Asteroid 2024 YR4 is bigger than the little one, perhaps as large as the football field! JWST 🔭 data next month will help pin down the size.

Image by Michael Carroll illustrating the sizes of some asteroids in 2013. The asteroids are shown in comparison to a US football field. We had seen the big one coming, and it just buzzed Earth. But the littler one we did NOT see coming, and it hit Earth above Chelyabinsk, creating a shockwave the blew out windows and injuring more than 1400 people. The asteroid we are monitoring now - 2024 YR4 - is bigger than the little guy, but maybe as large as the whole football field! Our JWST measurements next month will help pin down the size. Source: https://carrollspaceart.com/gallery/comparisons/

Dr. Stéphanie Juneau @stephajuneau.bsky.social · last yr.

Excited about this press release on Raga's great work finding elusive intermediate-mass black holes in galaxies! This project started during her PhD. Nice to see it come to fruition & also a glimpse of what the future holds with now much more DESI data in hand 🤩🔭 noirlab.edu/public/news/...

DESI Uncovers 300 New Intermediate-Mass Black Holes Plus 2500 New Active Black Holes in Dwarf Galaxies - The Dark Energy Spectroscopic Instrument discovers a treasure trove of active black holes in dw...

Within the Dark Energy Spectroscopic Instrument’s early data, scientists have uncovered the largest samples ever of intermediate-mass black holes and dwarf galaxies hosting an active black hole, more ...

noirlab.edu

Astro Data Lab @astrodatalab.bsky.social · 2y ago

✨January 2025 updates✨ - Added 6 datasets: Palomar Gattini-IR (PGIR) DR1, S-PLUS DR4, DES Y6 Gold, PHAT v3, DeMCELS DR1, SDSS DR12 stellar mass VACs - Added 4 Jupyter notebooks to our collection available to all users and on GitHub Read more in our Newsletter! datalab.noirlab.edu/newsletters/...

NOIRLab Newsletter 2025/01

datalab.noirlab.edu

Dr. Stéphanie Juneau @stephajuneau.bsky.social · 2y ago

Very proud of Isabella's work which she started during a TIMESTEP internship at NOIRLab last summer. She wrote a very nice Jupyter notebook on galaxy quenching featuring the SDSS "cosmic slime" estimates of matter density. Check out her #aas245 iPoster 465.04 (notebook linked in short thread below)

Astro Data Lab@astrodatalab.bsky.social · 2y ago

📣Undergrad student Isabella Olin is presenting her #aas245 iPoster 465.04 soon (1-2pm) on SDSS/BOSS Large Scale Structure and the "Cosmic Slime" Value-Added Catalog, where she investigates the impact of environment on galaxy quenching She contributed a new Jupyter notebook on her work (link below)

National Radio Astronomy Observatory - NSF NRAO @thenrao.bsky.social · 2y ago

🔎 #AAS245 Scavenger Hunt 🔍 ngVLA antennas are hidden around the conference center! Find one? Take it home, and don’t forget to tag us @thenrao.bsky.social! (@thenrao on all socials) #RadioAstronomy 📡

Nereide @drnereide.bsky.social · 2y ago

🧵 1/ For those who missed it, this is the stunning image from Webb's NIRCam showing NGC 604, a star-forming region located around 2.73 Mly away in the Triangulum galaxy (M33). Source and more➡️ science.nasa.gov/missions/web... Credits: NASA, ESA, CSA, STScI 🔭 🧪 #extragalactic #NASAWebb #JWST

This is an image from JWST’s NIRCam (Near-Infrared Camera). It features the star-forming region NGC 604 and shows how stellar winds from bright, hot, young stars carve out cavities in surrounding gas and dust. The most noticeable features are tendrils and clumps of emission that appear bright red, extending out from areas that look like clearings, or large bubbles in the nebula.

Elizabeth Tasker @elizabethtasker.bsky.social · 2y ago

When bacteria was found on an asteroid Ryugu grain in London, the media questioned whether terrestrial contamination was ever avoidable. No contamination has been found at JAXA. But let's take a look at what that takes... brace yourself (my latest on Cosmos 🧪🔭🛰️) 👉 cosmos.isas.jaxa.jp/keeping-out-...