Alexis Quintana @alexis-space.bsky.social Astronomy postdoc fellow in LIRA (@liraastro.bsky.social), Paris Observatory (@obs-paris-psl.bsky.social) in 🇨🇵.
Works on OB stars, stellar associations & clusters and Galactic structure & dynamics.
From 🇧🇪, previously in 🇬🇧 and 🇪🇦.
he/him
Bibiana Prinoth @bibianaprinoth.ch 🇨🇭
• ESO fellow @eso.org exploring exoplanet atmospheres 🪐 🔭 🇩🇪
• PhD from Lund Observatory 🇸🇪 & ESO 🇨🇱
• passionate about all things outreach and science communication ✨
Space Sciences Laboratory @ucbssl.bsky.social The UC Berkeley Space Sciences Laboratory (SSL) designs, builds and operates high-return, low-cost NASA missions. Our engineers, scientists and staff support a wide range of space and ground-based projects. 👇
https://www.ssl.berkeley.edu/
The Star Formation Newsletter @starformationnews.org Since 1992, the Star Formation Newsletter has been the premier destination for news about star & protoplanetary disk formation. We publish a monthly newsletter of papers, interviews, upcoming conferences, and more!
Web: https://starformationnews.org
Nora Wagner @norawagner99.bsky.social Astrophysics PhD student in Vienna focused on nearby Star Clusters ✨🌱
Fabian Polnitzky @fabian-polnitzky.bsky.social PhD student in Astrophysics at @rwth.bsky.social | Mapping the structure of the Milky Way | Studying protoplanetary discs | Resolving merge conflicts
https://fabianpolnitzky.github.io/
he / him
Guimei Liu @guimei22.bsky.social 
Stellar Origins 2025 @ Vienna @stellarorigins2025.bsky.social Sept. 15-19, 2025 - Vienna (Austria) ✨🌌
Topics: Galactic and Extragalactic Star Formation, Structure & Dynamics of the ISM, IA and ML
website: https://stellarorigins2025.univie.ac.at/
Posts under the hashtag: #stellarorigins2025
Núria Miret Roig @nmiretroig.bsky.social 
Alvaro Hacar @cosmicfiber.bsky.social Assoc. Prof. in Astrophysics at the University of Vienna. Interests on Interstellar Medium, star formation, ALMA, radioastronomy, filaments and clouds
Alyssa Drake @abdrake.bsky.social Astrophysicist @ Herts. Brit who was lost in France, German forest & now Hatfield. Ex MNRAS AE. Worried about UK science & in general.
Leila Belkora PhD, astrophysics @leilabelkora.bsky.social Science writer. Roots in US (NE/CO), Morocco, Switzerland. She/her. Current project: poet Robert Frost as amateur astronomer, to come from Clemson @cupress.bsky.social
Agent Henry Thayer at Brandt & Hochman.
Gwenllian Williams @gwenows.bsky.social Lecturer at Aberystwyth University, interested in how stars form ⭐️
🏴 Darlithydd ym Mhrifysgol Aberystwyth, diddordeb yn sut mae sêr yn ffurfio 🇪🇺
Slavko Bogdanov @slavkobogdanov.bsky.social Astrophysicist ordinaire. Columbia University.
slavko.org- T @teresaantoja.bsky.social @teresaantoja.bsky.social
Bryan Gaensler @scibry.bsky.social Dean of Science at the University of California, Santa Cruz (UCSC). Astronomer, sci-fi connoisseur, rugby league devotee, puzzled parent 🇦🇺🇨🇦. Opinions ∉ UCSC.
Santa Cruz CA, USA. He/him. bryangaensler.net
Dr. Teresa Valdivia-Mena @terevaldivia.bsky.social (Radio)Astronomer 🌟 she/her
Postdoc fellow at European Southern Observatory
Known as the streamer girl
Ilaria Pascucci @pascucci.bsky.social Astrophysicist and Planetary Scientist. Professor at the University of Arizona. Fellow, American Astronomical Society. Outdoor enthusiast with a love for hiking, biking, and dogs.
lilly @lillykormann.bsky.social astrophysics phd student at @univie.ac.at
she/her
classified as a moving group
website: lillykormann.github.io
Marijke Haverkorn @marijkehaverkorn.bsky.social Professor of Cosmic Magnetism at Radboud University. Magnetic fields in the Milky Way, radio and optical polarimetry. Researcher, teacher, parent. 
Star Cluster Memes For Stellar Overdensity Teens @starcluster.meme star cluster memes worse than your isochrone fit 📉
voted #1 Blanco 1 fan by the Blanco 1 fan club
✨ maintained by @emily.space ✨
John Lewis @astrojthe3.bsky.social Learning and Education Design specialist, Software (Python/vue.js) dev, PhD Astronomy, @harvard.edu @cosmicds.bsky.social, 🔭✝️
Comments, RTs, likes are all me and represent on one else
Sarah Loebman @sloebman.bsky.social Astrophysics faculty, diversity, equity, & inclusion enthusiast, passionate about Big Data and the Milky Way.
Randall Munroe @xkcd.com 
Laura Lopez @ohdearz.bsky.social Professor of astronomy 🔭 at Ohio State. Co-chair of @aascsma.bsky.social. Alum of UCSC and MIT. She/her 🇲🇽
Loreno Heer @lorenoheer.bsky.social Scientist: PhD in mathematics. Working in hyperbolic geometry, analysis in metric spaces and mathematical physics (gravitational waves and general relativity), various other scientific interests.
Here mostly to connect with researchers.
he/him
born@344 ppm
Richard Alexander @richardalexander.bsky.social Astrophysicist at the University of Leicester | Dad | Cyclist | Exiled Scot
https://rdalexander.github.io
Jiayi Sun @astrojysun.bsky.social Astronomer @ Princeton University (NASA Hubble Fellow) | 孙嘉懿 | he/him | https://astrojysun.github.io
Katja Fahrion @katjafah.bsky.social Astronomer, Marie Curie Fellow at Uni Vienna, studying nuclear star clusters, globular clusters and galaxies. She/her
Cliff Johnson @lcjohnso.bsky.social Astronomer and Zooniverse Co-Director | NorthwesternU + Adler Planetarium | Things that are amazing: galaxies, star clusters, and big shiny telescopes.
Nikki Miller @nikkimiller.space Postdoc at Uppsala University studying M-dwarfs and eclipsing binary stars. Also: astronomy camps, music, languages, photography & board games.
From 🏴 - lives in 🇸🇪 - often found in 🇩🇪
nikkimiller.space | iayc.org | she/they
Marcin Semczuk @msemczuk.bsky.social Dad & Husband | Postdoc in Astrophysics (galactic dynamics & morphology) at the Universitat de Barcelona 🌌 | 🇵🇱 in 🇪🇸 | FPL enthusiast ⚽️
Matthieu Béthermin @matbethermin.bsky.social Faculty astronomer at Strasbourg observatory. Star formation in high-z galaxies from sub-galactic scales to large-scale structures. Long distance triathlete when I am not nerding on my laptop. Husband of @karinavoggel.bsky.social.
Paul McMillan @mcmillan-astro.bsky.social Astrophysicist working on Milky Way dynamics and Gaia data. University of Leicester. Views expressed are my own.
Website: https://paulmcmillan-astro.github.io/
Pau Ramos @brugalada.bsky.social Milky Way dynamicist, working mostly with Gaia data, and also a member of the JASMINE project. Currently living in Japan 🇯🇵
I love cinema, music, manga and the stories I get to experience through videogames. 
Dr Rajika "Reggie" Kuruwita @reggiek.bsky.social Sri Lankan-Australian Astrophysicist 🇱🇰🇦🇺. Post-doc at the Australian National University. Binary and multiple star formation! ✨ Cats, Space, science-based life choices, DV survivor, She/her, opinions my own
Matthias Steinmetz @galacticrave.bsky.social Astronomer & Astrophysicist, Galactic Archaeologist & Simulator, Husband & Dad, Director @AIP_Potsdam, backyard astrophotographer
Jos de Bruijne @astrojos.bsky.social Father of 2, husband, hobby wildlife photographer, #AFOL. Astronomer at European Space Agency @ESA working @ESA Gaia & @ESA ESDC. Tweets are my own. He/him/his.
Florent Renaud @florenaud.bsky.social Astrophysicist making galaxies crash and computers collide. Or the other way round 🔭
Research professor (directeur de recherche) in astrophysics at CNRS / Strasbourg Observatory, France 🇫🇷 🇪🇺
John Forbes @redshiftless.bsky.social Astronomer in Aotearoa/New Zealand at the University of Canterbury.
Pusher of pixels, pens, arrays, and computer keys.
www.johncforbes.com
The Open Journal of Astrophysics @ojastro.bsky.social A peer-reviewed Diamond Open-Access Astrophysics journal using an arXiv overlay. This community-run service is provided entirely free for authors and readers.
https://astro.theoj.org/
András Gáspár @andrasgaspar.bsky.social Associate Astronomer at the University of Arizona. JWST/MIRI Instrument Team. Debris disk aficionado. Classic car enthusiast. Opinions my own. He/him
Mike Kuhn @mikeakuhn.bsky.social Astronomer interested in star formation and statistics. Senior Lecturer at the University of Hertfordshire. Formerly Caltech, Universidad de Valparaíso, and Penn State. https://star.herts.ac.uk/~kuhn/- G Greg Herczeg @gregherczeg.bsky.social Welcome to the medium place.
Cosima Eibensteiner @astrocosi.bsky.social Austrian Astronomer -- Jansky Fellow at NRAO | exploring the space between stars in nearby galaxies 🔭 | Did my PhD at Uni Bonn & IMPRS | BA BSc MSc at Uni Wien 🇦🇹 | misses Marillenknödel
Sierra Grant @sierragrant.bsky.social Carnegie Fellow at the Earth and Planets Laboratory. Protoplanetary + circumplanetary disks. Formerly at MPE, BU, and University of Michigan. She/her. #BiInSci 🏳️🌈✨🔭 Opinions are my own.
sierragrant.com
Tom Megeath @megadeath.bsky.social Astronomer studying the birth of stars, rust belt academic, connoisseur of beer inspired acronyms, closet Dadaist, & child of immigrant.
Mathias @lechtl.bsky.social Astronomy and Physics Student @univie.ac.at, he/him
isak @isakndbr.bsky.social your friendly neighbourhood open cluster enthusiast| galactic archeology & mapping | he/him
Data Science @ Uni Vienna @ds-vienna.bsky.social Our research network is a hub for all #DataScience activities @univie.ac.at #univienna
https://datascience.univie.ac.at
gaia memes for parallax < 0.01 as connoisseurs @gaiamemes.bsky.social memes about your favorite telescope at L2
João Alves @joaoalves.bsky.social Professor of Astrophysics at the University of Vienna
Joanna Drążkowska @astrojoanna.bsky.social Astrophysicist ✨ Research Group Leader at MPS Göttingen 🇩🇪 Planet formation theory 🪐 she/her
https://www2.mps.mpg.de/homes/drazkowska/
Emily Hunt @emily.space Postdoc @univie.ac.at working on star clusters & machine learning.
Also: open web developer & enthusiast, working on @astrosky.eco and more
🏳️🌈 🏳️⚧️ (she/her), Ⓥ
Website: https://emily.space
GitHub: https://github.com/emilyhunt
Katie Mack @astrokatie.com Cosmologist, pilot, author, connoisseur of cosmic catastrophes. TEDFellow, CIFAR Azrieli Global Scholar. Domain verified through my personal astrokatie.com website. She/her. Dr.
Personal account; not speaking for employer or anyone else.
Phil Plait @philplait.bsky.social Bad Astronomer (formerly @BadAstronomer), SciCommer, Dork. Crash Course Astronomy guy. He/him. Newsletter: badastronomy.beehiiv.com
I'm self-employed so my opinions do in fact represent my company's.
CosmicRami 🏳️🌈🏳️⚧️ @rami.spaceaustralia.com Astronomer, driving The Dish📡 to study pulsars in my PhD. Also, founded SpaceAustralia.com. Also, love a bit of astrophotography. Also, do everything with my little mate, Max. Also, Ultra-Gay. He/Him.
Mike Brown @plutokiller.com Astronomer, planet hunter, Pluto killer, bear whisperer, finger-wrapped dad. Dangerous secularist. Foot soldier in the War on Cars. He/him.
mikebrown.caltech.edu
Emily Lakdawalla 🏳️⚧️ Uranus Expert @elakdawalla.bsky.social Planetary scientist, freelance science writer and space artist, queer, ADHD, mom. Turns out it’s hard to be all those things at once. Shop at elakdawalla.Etsy.com
Robert McNees @mcnees.bsky.social Physicist and Professor at a university in Chicago. I study black holes, quantum gravity, and cosmology. Rocky Top, Tar Heel. Reposts are spooky action at a distance.
My views, not my employer's.
https://jacobi.luc.edu
https://mcnees.github.io
Nora's Guide to the Galaxy @ngttg.bsky.social I love space!
PhD, Astrophysics
SFF Author
🚀🌌👩🚀🌠🪐
🔗: https://galaxy.nora-bailey.com/linktree
Dr. Jessie Christiansen @aussiastronomer.bsky.social Caltech/IPAC Planet Hunter | Chief Scientist, NASA Exoplanet Science Institute | @TEDFellow | Science consultant | SHERA PI | My views are not the views of NASA | She/her
sanjana! @sanjanacurtis.bsky.social big fan of stars 💻✨🦫🏳️🌈
Sarah Tuttle @niais.cryptoanarchy.network "Ok. Not good. Probably bad." Disabled, queer, Jewish, cyborg, astrophysicist, abortion funder, antifascist, wielder of wrenches. Building joy with a side of chaos. "..a wizardess is never late. Nor is she early. She arrives precisely when she means to."
Sarah Hörst @planetdr.bsky.social Professor of planetary science at Johns Hopkins. Titan’s biggest fan. Pomeranian wrangler. Runner. Love many, trust few, always paddle your own canoe. She/her. sarahhorst.com
Planetdr.26 on signal
Dr. Raven the Science Maven @ravenscimaven.bsky.social I'm Raven Baxter, Ph.D. I'm molecular biologist and science educator who loves sharing science with the world! thesciencemaven.com
Jonathan McDowell @planet4589.bsky.social Astrophysicist
Support the work of Jonathan's Space Report:
https://www.gofundme.com/f/fund-jonathans-space-report-library-transition
Chris Lintott @chrislintott.bsky.social Astronomer, writer and zookeeper. Oxford, Gresham and the Zooniverse. The human half of the Dog Stars podcast. New book: 'Our Accidental Universe' (UK/rest of world) and 'Accidental Astronomy (US) now out.
Karen Masters @karenlmasters.bsky.social Prof. of Astronomy and Physics, Haverford College. PI of Galaxy Zoo. Radio astronomer. Check out my latest book “The Astronomers Library” about books, libraries and astronomy - three of my favourite things. Brit/US.
Mike Boylan-Kolchin @mbkplus.bsky.social Dad, husband, astrophysicist, dog herder. Samuel T. and Fern Yanagisawa Regents Professor in Astronomy at UT Austin. This is a personal account and the views expressed in my posts here are mine. https://mrbk.github.io
Michele Bannister @astrokiwi.bsky.social Planetary astronomer @UCNZ: envisioning worlds from here and elsewhere, in a dark & glorious sky. Rutherford Discovery Fellow & Assoc. Professor. Asteroid (10463). Pākehā; she
Yvette Cendes @whereisyvette.bsky.social Astronomer here! I’m a Hungarian-American radio astronomer, alias /r/Andromeda321 on Reddit. Assistant professor at the University of Oregon 
Nicole Gugliucci @noisyastronomer.com Physics professor, astronomer, educator, science communicator in NH, US. Lover of dogs, spec-fic, weights, and good trouble. She/they.
Opinions my own. RTs≠endorsements. Most older posts auto-delete.
I swear a lot.
https://bio.link/noisyastronomer
Astrobites @astrobites.bsky.social Digestible summaries of the latest astronomy research. Written by an international team of grad students for undergrads! Supported by the @AAS_Office. #scicomm
Astronomer Royal for Scotland | Catherine Heymans @astroroyalscot.bsky.social Astronomer Royal for Scotland, Professor of Astrophysics, Edinburgh University. Author of How to Design a Universe. @astronomerroyal on insta (She/her)
Saavik ‘Careful of the Ankle’ Ford @saavikford.bsky.social CUNY Astro prof, AMNH research assoc, runner, astronomer, crafter, camper, gardener, mom, all opinions completely my own (she/her)
Dr. Lucian Walkowicz @notnotrocketscience.com Astronomer, movement artist, & educator based in Chicago 🛸 Founder, Not Not Rocket Science ✨Co-founder, the JustSpace Alliance 🚀they/them causing mayhem
notnotrocketscience.com
Dr Jan Eldridge @astro-jje.bsky.social NZ theoretical astrophysicist studying exploding binary stars. Sci-fi addict, feminist, non-binary femme. Pronouns: she/her/they. All views my own.
Space Telescope Science Institute @stsci.edu STScI is the Science Operations Center for Webb, Hubble, and Roman space telescopes, & Mission Operations Center for Webb. We help humanity explore the universe with advanced space telescopes and data archive. news.stsci.edu
Black In Astro @blackinastro.bsky.social Celebrating and amplifying the Black experience in space-related fields. EST. 2020
✉️ blackinastro@gmail.com
Website: blackinastro.com
https://www.blackinastro.com/black-space-week-2026
Markus Pössel @mpoessel.de Astronomy and relativity outreach (Tweets in German & English) | personal account | he/his | managing scientist @hausderastronomie.bsky.social | director @astro4edu.bsky.social |outreach @mpi-astro.bsky.social | Seestar enthusiast
Sera Markoff @profsera.bsky.social Plumian Prof in Astro @U Cambridge & Prof Astro-/Particle Physics @U Amsterdam. All things black hole, member: Event Horizon Telescope, Africa Millimeter Telescope, CTAO. Space, sci-fi, cats, music, valve amps, other unabashed geekery. www.seramarkoff.com
Erin M. May, PhD @astronomay.bsky.social Staff Astronomer @ a place - Exoplanet Atmospheres. All data is good data.
Plus Knitting, Stickers, Baking, and other crafty things. Toddler mom.
Previously known as @_astronoMay on the other site.
ErinMMay.com
SiderealStickers.Etsy.com
Michelle Collins @runningastronomer.bsky.social ✨Astronomer searching for and studying the faintest galaxies in the Universe ✨co-host of the @starxiv.bsky.social podcast ✨ Enthusiastic-but-mediocre runner 🏃🏻♀️ vegan 🌱 She/her
Dr. Heloise Stevance @sydonahi.bsky.social Astrophysicist - Schmidt A.I. in Science Fellow - Oxford Uni - she/they
Sky surveys
Exploding stars
Hungry black holes
AI Literacy
Beatrice Tinsley Lecturer 2021
Caroline Herschel Prize 2024
hfstevance.com
Peter Coles 🏳️🌈 🏳️⚧️ 🇮🇪 @telescoper.bsky.social Theoretical astrophysicist specializing in the Universe and all that surrounds it. Based in Ireland. Personal account. Call me old-fashioned but I don't like fascists. He/him/his.
Blog: telescoper.blog
Dr. Timothy Pickering @tepickering.bsky.social astronomer, telescope wrangler, grizzled pythonista, bluesky boomer
James Davenport @jradavenport.com Astronomy professor in Seattle. Coffee drinking, year-round-plaid wearing, joke telling space dad. Searching for ET, caring for humans.
https://jradavenport.github.io
🔭☕️🎤
Pauline Barmby @pbarmby.bsky.social LLM-free science: https://orcid.org/0000-0003-2767-0090, fiction: https://www.galacticwords.com. Words in Year’s Best Cdn F&SF, Utopia SF, Analog, OnSpec, MNRAS, ApJ, etc. Knitter, curler, sometime runner. 🇨🇦 & minor planet 281067. She/her.
Dr Becky Smethurst @drbecky.bsky.social Astrophysicist studying how supermassive black holes affect galaxies (s/h). I get overly enthusiastic about space (and cats) on YouTube: http://www.youtube.com/drbecky
Prof. Carl E. Fields 💥 @carlnotsagan.github.io Computational Astrophysicist and Assistant Professor @uarizona.bsky.social & @stewardobservatory.bsky.social. #Forbes30u30, Science 2021. He/Him. carlnotsagan.github.io.
Meg Schwamb @megschwamb.bsky.social Planetary scientist & astronomer at Queen’s University Belfast: KBOs, Planet Four(Mars), exoplanets (Planet Hunters NGTS) ,LSST SSSC co-chair. Opinions posted are my own. Pronouns: she/her
Prof Anna Watts @profannawatts.bsky.social Professor of Astrophysics @ Univ. of Amsterdam. Neutron stars, pulsars, dense matter, X-ray astronomy. Mom, Migrant. "Particles in stars blah blah". Does science with NICER on the International Space Station and schemes for EVEN BIGGER SPACE TELESCOPES.
American Astronomical Society (AAS) @aas.org The mission of the American Astronomical Society is to enhance and share humanity’s scientific understanding of the universe as a diverse and inclusive astronomical community.
aas.org
Brett Morris @brettmorr.is Astronomer, software engineer.
Supporting space telescopes, open science, and data access in astrophysics.
Thrilled and haunted by dots on stars.
http://brettmorr.is/
Posts my own, not my employer's.
Andrew Mann @amann.bsky.social Associate professor of Physics and Astronomy at UNC Chapel Hill studying young exoplanets and stars. Dad to one human and one cat. 🏳️🌈💗💜. Carrboro Citizen. http://andrewwmann.com
All the Galaxies! @allthegalaxies.galaxyzoo.org Posting galaxies classified by the public on Galaxy Zoo, @galaxyzoo.org
Created and maintained by @davidoryan.bsky.social with backup support from @vrooje.net and @emily.space
Matthew Kenworthy @mattkenworthy.bsky.social Professor of astronomy working at Leiden Observatory in the Netherlands on the direct imaging of extrasolar planets and transits of giant ring systems || Opinions my own || Will tell Dad jokes for cash. https://kenworthy.space/
Joe Callingham @astrojoe.bsky.social Dutch-Australian | Astrophysicist | Head of the Square Kilometre Array (SKA) Science Group at ASTRON | Associate Professor at the University of Amsterdam