ESO @eso.org The European Southern Observatory designs, builds & operates world-class observatories on the ground for the benefit of society. More info on eso.org
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Josef Aschbacher @josefaschbacher.esa.int The Director General of the European Space Agency
Professor Carole Mundell @cmundell.esa.int Director of Science, @esa.int; Head of the European Space Astronomy Centre, Madrid. Astrophysicist, science diplomat, ex-Science Council President; ex-Chief Scientist Adviser & International Science Envoy, UK FCDO. She/her. My views.
Jesรบs Corral Santana @jcorrals.bsky.social PhD Astrophysics @eso.org supporting observations at #Paranal in Chile. Research in #BlackHoles. From the Canary Is ๐ฎ๐จ๐ช๐ธ, living in Chile ๐จ๐ฑ
Dr. Emily Moravec ๐ก @dreamoravec.bsky.social Assistant Scientist at Green Bank Observatory, radio astronomer, studies radio galaxies and galaxy clusters, paragliding pilot, triathlete, traveler.
https://www.emilymoravec.com
Cees Bassa @cbassa.bsky.social Astronomer at ASTRON in the Netherlands, working with the LOFAR low frequency radio telescope. 
Science Magazine @science.org Cutting-edge research, news, commentary, and visuals from the Science family of journals. https://www.science.org
Keith Smith @drkeithsmith.bsky.social PhD, occasional astronomer, talking head, science geek, cynic. Senior Editor at @Science.org, responsible for research papers in astronomy and planetary science. Views own, duh. Bio: https://www.science.org/content/author/keith-t-smith
Andrea Rotter @andrearotter.bsky.social Deputy Director Academy for Politics and Current Affairs & Head of Foreign & Security Policy Division @HSS | Non-Resident Fellow @AGI | ๐ฉ๐ช๐ช๐บ๐บ๐ฒ| | space security enthusiast ๐ฐ๐| WIIS | ex SWP Berlin, GMFUS fellow | personal views only
Ankit Panda @nktpnd.bsky.social Stanton Senior Fellow, Carnegie Endowment for International Peace; Author of โTHE NEW NUCLEAR AGEโ (Polity) & โKIM JONG UN AND THE BOMBโ (Hurst/Oxford)
Subscribe to my newsletter (Nukesletter): https://panda.substack.com/
Malcolm Davis @drmalcolmdavis.bsky.social Australian Defence and Space Policy Analyst based in Canberra with ASPI. Interested in space policy, defence and national security issues, strategic policy issues, international relations, and personal interests include astronomy and electronic music. 
Alex Gilbert @spacepower.bsky.social Space resources, nuclear innovation, energy markets, climate policy
Director at Zeno; Fellow, PhD Student at Colorado School of Mines
Sam Wilson @spacenukesam.bsky.social Space and nuke analyst at the Center for Space Policy & Strategy at the Aerospace Corporation, Spanish soccer aficionado
Chris Johnson @chrisjohnson.bsky.social Lecturer in space law at the International Institute of Air and Space Law (IIASL) at Leiden University @unileiden.bsky.social
Almudena Azcรกrate Ortega @almuazcarate.bsky.social Space Law Lead at Secure World Foundation โจ | Fellow at UNIDIR ๐บ๐ณ | Doctor in Space Law ๐ | Academic Fellow at Georgetown Center on National Security ๐ฐ | Opinions are my own
gรผneล รผnรผvar ๐ธ @gunuvar.bsky.social Mostly space law and policy, international economic law, and dachshunds
Senior Lecturer (Associate Professor) @ University of Exeter (from June 2026)
Previously University of Luxembourg, Max Planck Institute Luxembourg, and University of Copenhagen
etc
Dr Cassandra Steer @cassandrasteer.bsky.social Space security - international space law - space governance - IHL - women, peace and security in space. Spacecitizens.substack.com is where you'll find my writings. Founder and CEO of the Australian Centre for Space Governance. Consultant. Mother.
Andrea Harrington @spacelawprof.bsky.social Space law professor at McGill University, emphasizing the importance of public international law. SciFi enthusiast who believes fiction can help humanity to explore and influence our possible futures. 
Adriana Bankston @abankston.bsky.social Federal #govrelations expert. Scientific research & innovation #advocate. Previously with @uofcalifornia.bsky.social system. #researchpolicy #STEMworkforce #futureofSTEM
http://adrianabankston.com
N1 Engine Warehouse @nk-15.bsky.social Space nerd
she/her
Caleb Henry @chenryspace.bsky.social Director of Research at Quilty Space
๐ ๐ฐ๏ธ๐ก
Writing a book on OneWeb and the rise of megaconstellations
https://chenryspace.substack.com/
Orbital Policy Group @druidorbital.bsky.social Viewpoints and opinions on policy issues relating to Low Earth Orbit, including policy, science, governance, and cybersecurity.
Sarah Laframboise @sarahlaframboise.bsky.social PhD in Biochemistry
Executive Director, Evidence for Democracy
Tobin L. Smith @scipolguy.bsky.social Interested in #scipol #highered #STEMEd #scicomm.
Paul Connolly @commonsconnolly.bsky.social Comms on energy. Former journalist and press for @HouseofCommons + @UKParliament. Mostly poor takes on news, energy and QPR. Views all mine. #CIPR #OOTT
Dimitrios Stroikos @dstroikos.bsky.social Marie Skลodowska-Curie Actions (MSCA) Postdoctoral Fellow at the University of Bologna. Head of the LSE IDEAS Space Policy Project.
Chris Schaller @hicommander.bsky.social Software Developer, Planetary Image Research Lab, Lunar and Planetary Lab, University of Arizona - MRO/HiRISE โข TGO/CaSSIS โข Europa Clipper/EIS - he/him/his.
Will Gater @willgater.bsky.social Astronomer, author, astrophotographer. Former science journalist now working in the UK space sector to promote research, exploration & innovation.
willgater.com
Jay Shaw @nacahistorian.bsky.social PhD Candidate at the University of Missouri-Columbia. Researching how the NACA became NASA. Early space policy/ history of science and technology/Dad. USAF Retired. No DMs.
Robert Cumming @robertcumming.bsky.social Astronomer and communicator at Onsala Space Observatory and Chalmers University of Technology, Sweden
Taylor Grossman @tgrossman.bsky.social Director for Digital Security @istorg.bsky.social | Editor @bindinghook.bsky.social ๐ | Stanford & Oxford alum | often hiding in โฐ๏ธ
Nina @ninaneedsspace.bsky.social Intersectional feminist, knitter, #RunningPunk, #MDANT, cyclist, space fan, planetarian, Trekkie. Opinions mine. She/Her. #BWithTheT ๐ณ๏ธโ๐
mmg7f @mmg7f.bsky.social Engineer in aeronautics and space. Motorsports, ski, sciences, innovation & music lover. Moderator for multiple channels. Future streamer. All views are my own
Tobias Hoffmann @tobias1hoffmann.bsky.social Biochemist, now working in science policy.
Passionate about biodiversity ๐ชฒ๐ฟ, science and innovation policy #scipol, scientific policy advice, science diplomacy and of course the life sciences (cancer & RNA #splicing) - my own views only
Laetitia Cesari @laecesari.bsky.social Legally trained, with a weakness for satellites.
Doctor of Laws, Cyber and Outer Spaces.
๐ Publications: https://www.researchgate.net/profile/Laetitia-Cesari-2
Dr Megan Argo @astromeg.bsky.social Just another transient astronomer. Also: drummer, runner, public speaker, teacher and science advocate. Love all things #astronomy and #space. Often on the BBC!
Jim Way @jimway.bsky.social Executive Director at American Astronautical Society. Passionate about space, aviation, and everything in between.
Dr Erin Pobjie @epobjie.bsky.social ๐ International law academic | Essex Law School & @MPIL.de ๐ฉ Foreign & security policy thinktanker | @DGAP.org ๐ Non-resident fellow | UN Institute for Disarmament Research. I like hats.
๐ New book: tinyurl.com/ProhibitedForce
Eric Ralph ๐ @13ericralph31.bsky.social spaceflight communicator, former Teslarati spaceflight editor
he/him
(twitter refugee @13ericralph)
Kiran Mohan Vazhapully @kiranmohanv.bsky.social Senior Legal Officer @ Asian-African Legal Consultative Org. | McGill University | NUJS | Univ. of Kerala | (semi) homo scholasticus | Space Law | Int'l Law
Fraser Cain @fcain.universetoday.com Space journalist and skywatcher. I'm the publisher of Universe Today (universetoday.com) and co-host of Astronomy Cast (astronomycast.com). YouTube: https://www.youtube.com/@frasercain
Tim Farrar @tmfassociates.bsky.social Consultant in satellite communications and wireless spectrum. I enjoy annoying billionaires, especially the "(Former) Trillionaire"
Herb Baker @herbbaker.bsky.social Author of 'From Apollo To Artemis: Stories From My 50 Years With NASA.' NASA Alumni League Board of Directors. Speaker and theater actor. Liberal democrat. Astros fan. UT-Austin alum. Website: herbbaker.space
Samu Kahila @samukahila.bsky.social Dad. Space cowboy cleaning the orbit. Admirer of nature, lover of music, scribbler of words and researcher of history. Gamer, archer, boxer and art fan.
ciara @cosmociara.bsky.social Space Law (LLM) Student and Assistant Astronomer ๐ญ
Astronomy ๐ช Dark Skies ๐ Astrophotography ๐
sanjana! @sanjanacurtis.bsky.social big fan of stars ๐ปโจ๐ฆซ๐ณ๏ธโ๐
Jason Spyromilio ฮฮฌฯฯฮฝ ฮฃฯฯ
ฯฮฟฮผฮฏฮปฮนฮฟฯ @apolitosb.bsky.social Astronomer, supernovae, spent time at Paranal in prehistoric times, currently ELT telescope scientist www.eso.org/~jspyromi
Personal account. Speaking solely for myself
Hugh Lewis @profhughlewis.bsky.social Professor of Astronautics at University of Birmingham, UK, with interests in #SpaceDebris & #SpaceSustainability. Also a #pwME
Eric Stewart @eric-stewart-80.bsky.social Spectrum.
Auctions.
GenAI.
Compassion.
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 ๐ฆ๐บ๐จ๐ฆ. Opinions โ UCSC.
Santa Cruz CA, USA. He/him. bryangaensler.net
Will Pomerantz @pomerantz.bsky.social Head of Space at AeroVironment - my team makes Mars helicopters. Co-Founder, Brooke Owens Fellowship and Patti Grace Fellowship. Former planetary scientist. Husband, Dad, and Den Leader
Isaac Alexander @jetcitystar.bsky.social Editor In Chief JetCityStar. โ Aviation , โค Defense & ๐ Space News. Former Hype Aerospace, Global Aerospace Chat & Global Military Aviation Chat Host.
Gig Harbor, WA
Matt Daneman @mdaneman.bsky.social Covering cable ISP & satcom regulation, the FCC for
Communications Daily. "You hear something stupid and you realize itโs coming from your mouth." mdaneman@warren-news.com
Emma Louden @exoplanetemma.bsky.social Spreading practical hope with the stars ๐ซ๐
Astrophysicist | Strategist | Speaker
President of Slooh
Abby Beall @abbybeall.bsky.social specials editor and stargazing enthusiast @newscientist.com
Tony Mroczkowski @tonymroczkowski.bsky.social astronomer, submm instrument scientist, AtLAST, ALMA, ACT, GBT/MUSTANG-2, Simons Observatory, CMB-S4
Claudia Cicone @claudiacicone.bsky.social Astrophysicist. PI of the AtLAST project. From Roma (Italy), Professor at the University of Oslo (Norway). More astro stuff on claudiacicone.com and atlast.uio.no
Joolia Ghoulia @jooliaghoulia.bsky.social Strong female protagonist โ #horror maven โ investigator of the #paranormal โ recovering YouTube creator โ perpetrator of shenanigans โ a poke in the third eye ๐ณ๏ธโ๐โจ
Astro-Obs Newcastle ๐ญ @astro-obs-ncl.bsky.social The Astro-Obs group, researching observational astrophysics and cosmology at the School of Mathematics, Statistics and Physics at Newcastle University. ๐ ๐ญ๐ก
Jorge Moreno @jorgitomoreno.bsky.social Associate Professor. 4th Mexican scholar to earn tenure in astronomy/astrophysics in the United States. Exploring more research heavy opportunities. https://jorgemoreno.org
Dr Vicky Fawcett @astrofawcett.bsky.social @eso.org Fellow in Garching studying active galaxies โจ Science communicator, music lover
www.astrofawcett.com
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)
Megan Eaves-Egenes @meganeaves.com Travel & nature writer. Author of NIGHTFARING. Editor of Nightscape @darkskyintl.bsky.social โจ๐ New Mexican-Brit. China, Central Asia, Southwest US. Desert witch on a rainy island.
Agent: Jack Fogg
she/her ๐London
meganeaves.com
Garrett Merz @garrettmerz.bsky.social Physics PhD turned AI4Science postdoc at UWisconsin-Madison Data Science Institute. Gardening, banjo, roller derby, union organizing. Empty hands and the desire to unbuild walls.
Opinions, bad jokes, etc. all mine. He/they, I guess?
Guy Watkins @guywatkins.bsky.social ๐ช MPhys Astrophysics with Space Science student at The Open University.
๐ช Aspiring astrobiologist/planetary scientist. FRAS.
๐ช http://guywatkins.space
๐ Novice trail runner
๐ PLUR
Me99 ๐บ๐ฆ ๐ช๐บ @spaceme.bsky.social INFJ. Liberal. NAFO.
โIn an age of performative cruelty, kindness is punk AF. Be punk AF.โ
- Daniel Abraham
Eve Vavagiakis @evevavagiakis.bsky.social Assistant Professor of Physics at Duke. Cosmology and astrophysics with ACT, CCAT, and the Simons Observatory.
Author of Meet the Universe books, MIT Kids Press
Cornell alum x3 ๐ป Often outside ๐โโ๏ธ๐ต๐ปโโ๏ธ๐ฅพ
Bob Trembley @astrobalrog.bsky.social Bob Trembley: Podcast host and Factotum for the Vatican Observatory Foundation, Volunteer NASA/JPL Solar System Ambassador, President of Michigan's Warren Astronomical Society. My posts are my own.
Frank Kuhn @frankkuhn.bsky.social Doctoral Researcher @PRIF.org // Nuclear Deterrence and Arms Control // Cold War History // Military Technology, Operations and Strategy // Opinions my own
Failure To Launch Podcast @failuretolaunch.bsky.social A podcast for learning about all the bad things that happened to people who went up.
https://www.patreon.com/failuretolaunch
Lucinda Offer @marsonaut.bsky.social Education and Outreach Officer for the Royal Astronomical Society (G&S) | Chief Intโl Advisor for Mars Cell Labs | Former NASA Ames Mars Analogue Research Assoc., Exec. Dir. of the Mars Society for 12yrs & Lifetime member for 20+!
Angeliki Kapoglou @capoglou.bsky.social Futures, Space Systems and Systems Design
Daniel Munro @dkmunro.bsky.social Director, Research & Innovation, Actua.
Co-Director, Shift Insights.
Senior Fellow, Munk School.
Recovering political philosopher.
MIT PhD. Innovation. Science policy. Ethics. Skills. Space. JAWS. Running. Chronic napping. ๐จ๐ฆ
www.shiftinsights.ca
value plus discounted @akhilrao.bsky.social impersonal account
he/him
Markus Pรถssel @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
Jorge Villa-Vรฉlez @jurgenvilla.bsky.social Colombian Astronomer ๐จ๐ด School and Student Programmes Manager at #CERN. BL4S manger cern.ch/bl4s
Before: Postdoc at #LPENS Paris ๐ซ๐ท. #MOONS collaboration and #RECAstronomia
He/him/his ๐ณ๏ธโ๐๐ญ๐
Richard Easther @rjme.bsky.social Father, husband, scientist, Kiwi diaspora returnee, prof @aucklanduni.bsky.socialโฌ - opinions mine. He/Him
Science: https://cosmology.auckland.ac.nz
Blog: https://excursionset.com
Newsletter: https://buttondown.com/excursionset
Freya Blekman @freyablekman.bsky.social Particle physicist at @CMSExperiment at @CERN - Lead Scientist DESY & Professor of Physics University of Hamburg - World citizen โก๐ณ๐ฑ๐บ๐ธ ๐ฌ๐ง๐จ๐ญ๐ง๐ช๐ฉ๐ช
Posts: #physics #SciComm + academia/tech stuff + my opinions + summaries of #CMSpapers
Frederick Miguel (fox359) @fox359.bsky.social NASA Artemis Orion Mission Design and Flight Dynamics. Pilot. Physicist. Nerd.
Emily Hunt @emily.space Postdoc @univie.ac.at working on star clusters & machine learning
Passionate about a better future for science communication via @astrosky.eco
๐ณ๏ธโ๐ ๐ณ๏ธโโง๏ธ (she/her), โ
Website: https://emily.space
GitHub: https://github.com/emilyhunt
Nora's Guide to the Galaxy @ngttg.bsky.social I love space!
PhD, Astrophysics
SFF Author
๐๐๐ฉโ๐๐ ๐ช
๐: https://galaxy.nora-bailey.com/linktree
Dr. Tanya Harrison @tanyaofmars.bsky.social โVery Respected Science Personโ -NBC News
๐ด Former science operations for NASA Mars missions
๐ฐ๏ธ Current space sector strategist & author advocating for Earth
๐ Based in Ottawa but often found on a train
โจ๐จ๐ฆ๐ณ๏ธโ๐โจ
Dr Space Junk (Alice Gorman) @drspacejunk.bsky.social Space archaeologist | Global Expert Group for Sustainable Lunar Activity | Asteroid 551014 Gorman | Dr Space Junk vs the Universe. https://mitpress.mit.edu/9780262539654/dr-space-junk-vs-the-universe/ | Blog https://zoharesque.blogspot.com/
CosmicRami ๐ณ๏ธโ๐๐ณ๏ธโโง๏ธ @rami.spaceaustralia.com Astronomer, driving The Dish๐ก 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.
Haylee Archer @hayleearcher.bsky.social Astro PhD candidate at Lowell Observatory/ASU studying star formation in dwarf galaxies โจshe/her
Jonathan O'Callaghan @astrojonny.bsky.social Freelance space journalist. British Science Journalist of the Year 2024. Words in The New York Times, Scientific American, New Scientist, BBC, WIRED, + more.
Bangkok, Thailand
jdaoca@gmail.com
@astro_jonny on Twitter
https://www.jonathanocallaghan.com/
Remco Timmermans @timmermansr.bsky.social ๐๐ฐ๏ธ Social media for space at spaceagenda.com and spaceside.eu | Co-founder of SpaceCommsAlliance.com | Faculty at ISUnet.edu | #DigitalNomad
๐citizen ๐ณ๐ฑpassport ๐ฌ๐งresident ๐ช๐ชe-resident
SpaceKate @spacekate.bsky.social Space journalist, rocket chaser, storyteller. Advocate for diversity and women in STEM. ISU SSP12. Alter-ego of @radiokate.com
www.youtube.com/@NTKSpace
luc is figuring it out โป๏ธ๐ฐ๏ธ @lucriesbeck.bsky.social ๐ง ๐ญ Space, Climate, Tech, Justice. It could be better than this. he/they 
Justin Walsh @jstpwalsh.bsky.social Impossible archaeologist (space/Everest), space hab consultant, ancient Mediterranean, heritage | Prof at Chapman U | Fellow at USC | Explorers Club 50 | https://issarchaeology.org / http://brickmoonspace.com | He/him | Settler on unceded Tongva land (LA)
Justin Kugler @phalanx.bsky.social Senior Director of Business Dev for Intuitive Machines; Fmr Made In Space, ISS National Lab, and various other programs; Working to bring the abundance of our solar system to humanity; space systems/foresight/policy/strategy. All opinions mine. He/him
Dr. Tessa Fisher @tessafisher.bsky.social Research Facilitator, ASU| Astrobiologist | Trans Lesbian | SFF Writer | Lukewarm Ecosocialist | Union Woman | One Half of @asabpod.bsky.social | She/Her| ๐น
www.tessafisher.com
Words and opinions are my own.
Alyson Decker @alysondecker.bsky.social Litigator | Employment Law Guru | Your General Counsel | Mediator/Arbitrator | Space Attorney ๐ | Luminary
Cris van Eijk @crisveijk.bsky.social International law, the (space) commons, and how they're made.
PhD @newcastleuni.bsky.social | ๐บ๐ธ๐ณ๐ฑ๐ณ๏ธโ๐ | ๐: krษชs van aษชk | he/him
https://www.ncl.ac.uk/law/study/research/students/current-pgr-students/cristian-van-eijk/
Aaron Bateman @aaronbateman.bsky.social Assist. Prof. of History & Intl Affairs at George Washington U. | Book #1 : "Weapons in Space" | Book #2 "Wiring an Empire" (contracted w/ MIT Press)