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Galaxies

The Galaxies Science Interest Group (Galaxies SIG) offers an opportunity for researchers across all career stages studying galaxies.

About Galaxies SIG

Exploring Galaxies Throughout the Universe

The Cosmic Origins program is forming a science interest group (SIG) that will help NASA understand and implement recommendations from the upcoming decadal survey in the area of galaxies. This group will also sponsor discussions, research seminars, and periodic meetings.

Participating in a science interest group is an opportunity to meet people and make professional connections. It is an opportunity to learn about NASA astrophysics and share in the joy of creative science. It is also an opportunity to help others and give back to the astronomical community.

distant galaxies appear as bright glowing spots in this Webb telescope image, with some smeared by gravitational lensing; foreground stars appear bright with six-pointed diffraction spikes, owing to the shape of Webb's mirrors
NASA's James Webb Space Telescope has produced the deepest and sharpest infrared image of the distant universe to date. Known as Webb's First Deep Field, this image of galaxy cluster SMACS 0723 is overflowing with detail. Thousands of galaxies - including the faintest objects ever observed in the infrared - have appeared in Webb's view for the first time.
NASA, ESA, CSA, and STScI

Subscribe to the Galaxies SIG Email List

To join the list, send an email to Galaxies-SIG-join@lists.nasa.gov with Subject="join"

To unsubscribe, Send an email to Galaxies-SIG-leave@lists.nasa.gov with Subject="leave"

Your email address will be used only for the purpose of subscription to the selected email distribution list. For further information, read the NASA Web Privacy Policy.

News & Events

Galaxies SIG Seminar, 4 February 2026

Monsters in the Dark: Searching Far and Wide for Ultra-Luminous Galaxies at Cosmic Dawn Speaker John Weaver Abstract The first galaxies (z > 10) appear to have formed faster and more efficiently than predicted by standard models, but they are…

Feb 4, 2026
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Galaxies SIG Seminar, Feb 4, 2026

Monsters in the Dark: Searching Far and Wide for Ultra-Luminous Galaxies at Cosmic Dawn, Speaker | John Weaver

Feb 4, 2026
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Cosmic Origins at AAS 247, Jan 2026

The 247th AAS meeting (joint with the Historical Astronomy Division) will be held 4-8 January in Phoenix, Arizona at the Phoenix Convention Center. Join us in the exhibit hall at the NASA booth and attend the NASA sessions.

Jan 4, 2026
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Galaxies SIG Seminar 3 December 2025

Simulations Meet Space Telescopes to Understand AGN at Cosmic Dawn Speaker Sabrina Berger (University of Melbourne) Abstract For the first time, JWST lets us directly see the stellar light from galaxies hosting luminous quasars at z > 6. Early stellar…

Dec 3, 2025
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Galaxies SIG Seminar 5 November 2025

Disentangling Baryonic and Dark Matter Physics with the Smallest Galaxies Speaker Erin Kado-Fong (Stanford)  Abstract Low-mass “dwarf” galaxies, with masses less than around 10 percent that of the Milky Way, present both a puzzle and an opportunity for our understanding…

Nov 5, 2025
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Galaxies Science Interest Group (Galaxies SIG)

Subscribe to the Galaxies SIG Email List To join the list, send an email to Galaxies-SIG-join@lists.nasa.gov with Subject=”join” To unsubscribe, Send an email to Galaxies-SIG-leave@lists.nasa.gov with Subject=”leave” Your email address will be used only for the purpose of subscription to the selected…

Aug 25, 2025
Topic

Leadership Council

NameAffiliation & Email
Lead: Benne HolwerdaEmail
Co-Lead: Aaron YungEmail
Caryl GronwallEmail
Gregory MosbyEmail
David SobralEmail
Shobita SatyapalEmail
Rupali ChandarEmail

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An illustration of Sun-like star HD 181327 and its surrounding debris disk. The star is at top right. It is surrounded by a far larger debris disk that forms an incomplete ellpitical path and is cut off at right. There’s a huge cavity between the star and the disk. The debris disk is shown in shades of light gray. Toward the top and left, there are finer, more discrete points in a range of sizes. The disk appears hazier and smokier at the bottom. The star is bright white at center, with a hazy blue region around it. The background of space is black. The label Artist's Concept appears at lower left.