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Marc Postman

@astromarc.bsky.social
766 followers 127 following 201 posts

Astronomer studying galaxies, clusters, and dark matter. Envisioning the future of space astronomy. My posts are my own views. (he/him)

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Marc Postman @astromarc.bsky.social · 17/09/2026
The Lasker Postdoctoral Fellowship in Data Science is now being recruited at the Space Telescope Science Institute! With the launch of the Roman Space Telescope, this is an exciting time to join us in exploring astronomy's diverse data. Apply today! recruiting2.ultipro.com/SPA1004AURA/...
recruiting2.ultipro.com
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Marc Postman @astromarc.bsky.social · 15/09/2026
Finally!
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Marc Postman @astromarc.bsky.social · 08/09/2026
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Marc Postman @astromarc.bsky.social · 14/07/2026
Sacrebleu! Felicitaciones!!
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Raider @iwillnotbesilenced.bsky.social · 09/07/2026
"DO AS THEY SAY AND YOU WON'T GET HURT" IS ADVICE MEANT FOR HOSTAGES, NOT CIVILIANS CONFRONTED BY ICE.
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Marc Postman @astromarc.bsky.social · 14/06/2026
Wow! Kincks win!!
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Marc Postman @astromarc.bsky.social · 14/05/2026
That was quite a game! Go Avs!
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Marc Postman @astromarc.bsky.social · 12/05/2026
An excellent new book for anyone curious about the universe without the need to know math. A great intro to physics using real space missions as the guides. www.press.jhu.edu/newsroom/art...
press.jhu.edu
From Artemis to Voyager: The Physics That Powers Space Exploration
You don't have to be a rocket scientist to understand the fascinating physics behind space exploration.
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Space Telescope Science Institute @stsci.edu · 01/05/2026
OPPORTUNITY: The Space Telescope Science Institute in Baltimore, MD, is seeking researchers with scientific and technical skills in a broad range of areas in astronomy or planetary science, whether observational, instrumental or theoretical: bit.ly/4tayz7d
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Marc Postman @astromarc.bsky.social · 12/04/2026
That Orban conceded defeat was also something to celebrate.
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Marc Postman @astromarc.bsky.social · 05/03/2026
Karl Stapelfeldt (JPL/Caltech) and I summarize the historical context that has led us to the Habitable Worlds Observatory. We always build upon the work of many. HWO is no exception. We hope you find this short paper enlightening. arxiv.org/abs/2602.14823
arxiv.org
The Habitable Worlds Observatory in Historical Context
We summarize the past four decades of astrophysics and exoplanet direct imaging mission concept studies, technology developments, and scientific progress that have led to the initiation of the Habitab...
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Bruce Springsteen @brucespringsteen.net · 28/01/2026
I wrote this song on Saturday, recorded it yesterday and released it to you today in response to the state terror being visited on the city of Minneapolis. It’s dedicated to the people of Minneapolis, our innocent immigrant neighbors and in memory of Alex Pretti and Renee Good. Stay free
youtu.be
Bruce Springsteen - Streets Of Minneapolis (Official Audio)
YouTube video by Bruce Springsteen
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Marc Postman @astromarc.bsky.social · 01/01/2026
Preeminent in what? That is the question.
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Marc Postman @astromarc.bsky.social · 14/12/2025
A snowy morning in Maryland.
Scene showing snow covering backyard. Sunlight reflecting off snow on tree branches.
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European Space Agency @esa.int · 18/11/2025
Today is #LGBTQinSTEMDay 🌈 ESA proudly joins the STEM community in celebrating the unique contributions of LGBTQ+ individuals. The Pride Flag will fly across ESA sites as a reminder of how far we’ve come, and how much more there is to do. #SpaceForAll
Image of the progress pride flag flying at our ESAC site in Spain.Image of the progress pride flag flying at our ESRIN site in Frascati, Italy.Image of the progress pride flag flying at our ESEC site in Belgium.Image of the progress pride flag flying at our ESOC site in Darmstadt, Germany.
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Marc Postman @astromarc.bsky.social · 05/11/2025
Mayor Mamdani.
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Marc Postman @astromarc.bsky.social · 26/10/2025
NYT buries the lead yet again. The biggest challenge the refer to is governing NYC. This challenge would be present regardless of which candidate is elected. NYT: Don't make it a left vs right issue. NYT is really going downhill.
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Marc Postman @astromarc.bsky.social · 25/10/2025
www.nytimes.com/2025/10/25/u...
nytimes.com
Donor Who Gave $130 Million to Pay Troops Is Reclusive Heir to Mellon Fortune
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Marc Postman @astromarc.bsky.social · 08/10/2025
Are you an alum from one of the 9 schools the federal government just attacked? Sign this alumni petition now to support your school, defend democracy, and build a grassroots movement for campus freedom across America. alumni.standforcampusfreedom.org/petitions/tr...
alumni.standforcampusfreedom.org
STAND WITH YOUR SCHOOL: Trump attacks 9 universities. Sign the alumni petition now.
Are you an alum from one of the 9 schools the federal government just attacked? Sign this alumni petition now to support your school, defend democracy, and build a grassroots movement for campus freed...
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Marc Postman @astromarc.bsky.social · 30/09/2025
U.S. taxpayers are now covering the cost of outright political denigration on federal websites. www.hud.gov
hud.gov
HUD Home | HUD.gov / U.S. Department of Housing and Urban Development (HUD)
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Space Telescope Science Institute @stsci.edu · 29/09/2025
In the event of a U.S. government shutdown, STScI will extend the James Webb Space Telescope Cycle 5 proposal submission deadline for affected scientists. Details: www.stsci.edu/contents/news/jwst/20… #NASAWebb 🔭 🧪 ☄️
Logo of the Space Telescope Science Institute (STScI) over a vibrant cosmic background with the tagline "Expanding the Frontiers of Space Astronomy."
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Marc Postman @astromarc.bsky.social · 23/09/2025
Jackson to Andrews for the touchdown.. beautifully done.
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Marc Postman @astromarc.bsky.social · 10/09/2025
Nice overhead pass of the ISS tonight. A reminder of the remarkable things NASA does. Hoping we can continue to explore the universe…
A photograph of the sky directly overhead at night. Trees surround the borders of the image. In the center is a small bright trail of light which is the international space station.
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Marc Postman @astromarc.bsky.social · 07/09/2025
Another timely ballad by Elle and, for me, so appreciated. Chin up indeed.
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Marc Postman @astromarc.bsky.social · 28/08/2025
STScI is now accepting applications for the Giacconi Fellowship in astrophysics. Start date is Fall 2026 and funding is available for 3 years. More info here: www.stsci.edu/stsci-resear...
stsci.edu
Giacconi Fellowship
Learn about the requirements for STScI’s Giacconi Fellowship, which recognizes postdoctoral researchers in astronomy, astrophysics, and planetary science.
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Marc Postman @astromarc.bsky.social · 27/08/2025
A great example of great observatories combining their unique capabilities to reveal new information about the cosmos. Enjoy!
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Marc Postman @astromarc.bsky.social · 20/08/2025
One of the many reasons I love Boston!
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Marc Postman @astromarc.bsky.social · 15/08/2025
Good morning.
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Marc Postman @astromarc.bsky.social · 14/08/2025
Good response!
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Marc Postman @astromarc.bsky.social · 06/08/2025
A despicable new low. For the full text of the U.S. Constitution see constitutioncenter.org/the-constitu...
constitutioncenter.org
Full Text of the U.S. Constitution
Read and share the complete text of the United States Constitution.
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Dr. Susan E. Mullally @mustaric.bsky.social · 05/08/2025
For the morning crowd, here are all the observations stored in the Mikulski Archive for Space Telescopes. A visual created by Julie Imig, one of our amazing astronomical data scientists. Follow the link below for more colors and even a movie.
MAST's view of the sky, labeled with well known astronomy surveys. it is blue and white where there are many observations, especially around the south ecliptic cap and along the milky wy where there are many stars.
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Marc Postman @astromarc.bsky.social · 22/07/2025
A legendary rocker is gone. www.nbcnews.com/news/obituar...
nbcnews.com
Ozzy Osbourne, pioneering heavy metal singer and Black Sabbath frontman, dies at 76
Word of Osbourne’s demise came weeks after the ailing front man reunited with his original Black Sabbath bandmates.
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Marc Postman @astromarc.bsky.social · 15/07/2025
Beautiful simulation of all the supernovae that the Nancy Grace Roman Space Telescope could detect in a single pointing, monitored for 3.5 years. Thousands of things do go bang in the night! See www.nasa.gov/missions/rom...
nasa.gov
One Survey by NASA’s Roman Could Unveil 100,000 Cosmic Explosions - NASA
Scientists predict one of the major surveys by NASA’s upcoming Nancy Grace Roman Space Telescope may reveal around 100,000 celestial blasts, ranging from
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Yvette Cendes @whereisyvette.bsky.social · 14/07/2025
MeerKAT proposals are due today, the only telescope on Earth capable of doing some of our science. This weekend our toddler gave us all a cold, AND decided sleep was overrated last night from 230-530am. Send help, or at least caffeine 😵‍💫 🔭🧪
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Marc Postman @astromarc.bsky.social · 09/07/2025
A peaceful walk to work
A path through a green valley surrounded by mountains. A blue sky with a few white clouds highlights the clear weather when the photo was taken.
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Marc Postman @astromarc.bsky.social · 09/07/2025
Inspiring video about NASA's Flagship Mission for the next decade, the Habitable Worlds Observatory ... a true successor to the Hubble Space Telescope with the goal of measuring the likelihood of life on worlds beyond the Solar System and enabling revolutionary astrophysics! youtu.be/XJwDlLiQpS4
youtu.be
NASA’s Habitable Worlds Observatory Will Search for Life
YouTube video by NASA Goddard
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Marc Postman @astromarc.bsky.social · 30/06/2025
The first direct demo of interstellar navigation using stellar observations from a remote spacecraft. A real achievement for NASA and the New Horizons team. Current circumstances are limiting NASA led press coverage though. So please share!
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Nereide @drnereide.bsky.social · 24/04/2025
🧵 Continuing to celebrate Hubble's 35th anniversary, I share this captivating image of Jupiter and its volcanic moon Io. It was released on 20 April 1999, together with others two, to commemorate the 9th anniversary of the launch. Credit: J. Spencer (Lowell Observatory) & NASA/ESA 🔭 🧪 #Hubble35
This Hubble image shows the moon Io passing above Jupiter's clouds. The black spot on the gas giant is Io's shadow.
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Marc Postman @astromarc.bsky.social · 18/04/2025
Good summary of major issues with the recent claims of “detection” of biosignature gases on K2-18b.
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Marc Postman @astromarc.bsky.social · 24/03/2025
Overheard at the aquarium by a young kid looking at a large tank of tropical fish: “is this a screen or is it real?”
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Marc Postman @astromarc.bsky.social · 20/03/2025
Exciting first measurements by Sapna Mishra and collaborators of the distance to the Magellanic Stream using the VLT. Check it out. arxiv.org/abs/2503.14368
arxiv.org
The Distance to the Magellanic Stream: Constraints from Optical Absorption along Stellar Sightlines
The Magellanic Stream (MS) is a large tail of neutral and ionized gas originating from tidal and hydrodynamical interactions between the Magellanic Clouds as they orbit the Milky Way (MW). It carries ...
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Marc Postman @astromarc.bsky.social · 12/03/2025
If you ever read the poem "First they came for..." by Martin Niemöller and were not sure if it applied to you in the current day in the USA, the case of Mahmoud Khalil should be clear - first they came for the Palestinian protestors ... you could be next. Our first amendment rights are under threat.
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Sarah Kendrew @sarahkendrew.bsky.social · 12/03/2025
🔭
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Morgan Denman | Space-Focused Designer & Illustrator @morgandenman.bsky.social · 02/03/2025
Where you are and where you came from. 🌕 🌎 A genuinely stunning photo showing Blue Ghost’s shadow on the lunar surface with Earth in the distance. #space #moon #blueghost #science
Photo from Firefly Aerospace Blue Ghost Lander showing the lander’s shadow on the lunar surface in the bottom half of the image, and a distant Earth against the blackness of space in the upper half of the image

Credit: Firefly Aerospace
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Marc Postman @astromarc.bsky.social · 24/02/2025
Exciting to see the Roman Space Telescope taking shape at NASA’s Goddard Space Flight Center today.
Photo of the telescope assembly of the Nancy Grace Roman Space Telescope in the main spacecraft clean room at the Goddard Space Flight Center. Several technicians dressed in white protective suits are seen working on the telescope.
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Marc Postman @astromarc.bsky.social · 16/02/2025
Exactly.
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Marc Postman @astromarc.bsky.social · 13/02/2025
Astronomy (and Hubble Space Telescope in particular) makes yet another appearance on Jeopardy this week! "What is the Magellanic Cloud?"
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European Space Agency @esa.int · 11/02/2025
Happy International Day of Women and Girls in Science! 👩‍🔬 Join us in celebrating the brilliant talents who are shaping the future of science and technology, and dive deeper into the story of one of our young professionals making her way in space. ➡️ www.esa.int/About_Us/Div...
esa.int
ESA celebrates International Day of Women and Girls in Science 2025
Today we mark the International Day of Women and Girls in Science. Join us in a journey around Europe with EIROforum organisations to discover the brilliant talents who are shaping the future of scien...
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Marc Postman @astromarc.bsky.social · 31/01/2025
Ridiculous. And seriously flawed decision. But perhaps the MSU admins are just celebrating the year of the snake by exhibiting no spine.
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