Marc Postman
@astromarc.bsky.social
Astronomer studying galaxies, clusters, and dark matter. Envisioning the future of space astronomy. My posts are my own views. (he/him)
Preeminent in what? That is the question.
January 1, 2026 at 9:27 PM
Preeminent in what? That is the question.
A snowy morning in Maryland.
December 14, 2025 at 2:56 PM
A snowy morning in Maryland.
Reposted by Marc Postman
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
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
November 18, 2025 at 12:45 PM
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
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
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.
October 26, 2025 at 3:51 PM
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.
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...
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...
alumni.standforcampusfreedom.org
October 8, 2025 at 12:49 PM
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...
U.S. taxpayers are now covering the cost of outright political denigration on federal websites. www.hud.gov
HUD Home | HUD.gov / U.S. Department of Housing and Urban Development (HUD)
www.hud.gov
September 30, 2025 at 5:30 PM
U.S. taxpayers are now covering the cost of outright political denigration on federal websites. www.hud.gov
Reposted by Marc Postman
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: https://www.stsci.edu/contents/news/jwst/2025/jwst-cycle-5-deadline-extension-in-case-of-government-shutdown #NASAWebb 🔭 🧪 ☄️
September 29, 2025 at 8:15 PM
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: https://www.stsci.edu/contents/news/jwst/2025/jwst-cycle-5-deadline-extension-in-case-of-government-shutdown #NASAWebb 🔭 🧪 ☄️
Jackson to Andrews for the touchdown.. beautifully done.
September 23, 2025 at 2:02 AM
Jackson to Andrews for the touchdown.. beautifully done.
Nice overhead pass of the ISS tonight. A reminder of the remarkable things NASA does. Hoping we can continue to explore the universe…
September 10, 2025 at 1:12 AM
Nice overhead pass of the ISS tonight. A reminder of the remarkable things NASA does. Hoping we can continue to explore the universe…
Another timely ballad by Elle and, for me, so appreciated. Chin up indeed.
September 7, 2025 at 3:47 AM
Another timely ballad by Elle and, for me, so appreciated. Chin up indeed.
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...
Giacconi Fellowship
Learn about the requirements for STScI’s Giacconi Fellowship, which recognizes postdoctoral researchers in astronomy, astrophysics, and planetary science.
www.stsci.edu
August 28, 2025 at 3:09 AM
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...
A great example of great observatories combining their unique capabilities to reveal new information about the cosmos. Enjoy!
A new view of the Butterfly Nebula! 🦋
Webb joined forces with ALMA to bring you this unprecedented view into the heart of the nebula – seen here alongside optical & near-infrared images from Hubble. A stellar example of teamwork 👏
Read more 👉 www.esa.int/Science_Expl... 🔭 🧪
Webb joined forces with ALMA to bring you this unprecedented view into the heart of the nebula – seen here alongside optical & near-infrared images from Hubble. A stellar example of teamwork 👏
Read more 👉 www.esa.int/Science_Expl... 🔭 🧪
August 27, 2025 at 10:52 AM
A great example of great observatories combining their unique capabilities to reveal new information about the cosmos. Enjoy!
One of the many reasons I love Boston!
Last week, Boston received a letter from AG Bondi threatening to prosecute officials and withhold funds unless we cooperate with carrying out mass deportations.
The US Attorney General asked for a response by today, so here it is: stop attacking our cities to hide your administration’s failures.
The US Attorney General asked for a response by today, so here it is: stop attacking our cities to hide your administration’s failures.
August 20, 2025 at 7:41 PM
One of the many reasons I love Boston!
Good response!
The Taylor Scale measures how far a study deviates from rigorous evidence-based science. A key metric is the extent to which a study ignores the literature and standards of the topic, and how they curate the narrative and analysis to fit their goal.
August 14, 2025 at 12:02 PM
Good response!
A despicable new low. For the full text of the U.S. Constitution see constitutioncenter.org/the-constitu...
August 6, 2025 at 3:50 PM
A despicable new low. For the full text of the U.S. Constitution see constitutioncenter.org/the-constitu...
Reposted by Marc Postman
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.
August 5, 2025 at 11:49 AM
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.
A legendary rocker is gone. www.nbcnews.com/news/obituar...
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.
www.nbcnews.com
July 22, 2025 at 6:30 PM
A legendary rocker is gone. www.nbcnews.com/news/obituar...
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...
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
www.nasa.gov
July 15, 2025 at 8:29 PM
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...
Reposted by Marc Postman
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 😵💫
🔭🧪
🔭🧪
July 14, 2025 at 8:13 PM
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 😵💫
🔭🧪
🔭🧪
A peaceful walk to work
July 9, 2025 at 7:51 AM
A peaceful walk to work
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/XJwDlLiQpS4
NASA’s Habitable Worlds Observatory Will Search for Life
YouTube video by NASA Goddard
youtu.be
July 9, 2025 at 6:07 AM
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/XJwDlLiQpS4
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!
New Horizons is so far away that the nearest stars have shifted markedly from where we see them on Earth. With the NH observed positions for two stars, from NH imagery alone we can figure out where the spacecraft is. This technique would be used on interstellar voyages. arxiv.org/abs/2506.21666
A Demonstration of Interstellar Navigation Using New Horizons
As NASA's New Horizons spacecraft exits the Solar System bound for interstellar space, it has traveled so far that the nearest stars have shifted markedly from their positions seen from Earth. We demo...
arxiv.org
June 30, 2025 at 10:09 PM
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!