I'm going to expand this statement to say that astronomers should actually look at their data whatever the format. Yes pipelines and high level science products are great, but you learn a lot from just spending some time exploring the counts-on-pixels images, even for spectroscopy. π
09.03.2026 16:31
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Cover of "Picture an Astronomer: Best Practices for Retaining Talent in Astrophysics", which features an illustration of a 19-year-old Vera Rubin looking through a telescope over a backdrop of a first light image of spiral galaxies from the Rubin Observatory.
Happy International Women's Day!
Perfect time for me to (re)share our white paper on increasing the retention of women in professional astrophysics (really full of suggestions that broaden participation in academic science in general).
arxiv.org/abs/2512.24465
π§ͺπβοΈπ©βπ¬
08.03.2026 20:00
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After a week in Aspen, it only snowed on the last day, AND in that short time I still managed to get the car stuck in the mud and snow.
07.03.2026 21:19
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An image from part of the GOODS-South portion of the FUEL Survey showing random pointings of scattered around the area and a mosaic of pointings covering the UltraDerp Field.
Introducing the Far-Ultraviolet Extragalactic Legacy (FUEL) survey! We uniformly reduced and aligned all Hubble far-UV imaging in the extragalactic legacy fields. Shout out to my student Aliakbar Kavei for the great work completing this project. Check it out! π
arxiv.org/abs/2603.04511
06.03.2026 22:38
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Wow! Looks great!
27.02.2026 05:02
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How it started (maybe let's call these things Little Red Dots???) // How it's going (xkcd #3212) ππ§ͺ
26.02.2026 14:44
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Winter Olympics side effect: Iβm now commuting to campus on inline skates.
22.02.2026 19:18
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As promised yesterday: a new alternative model for Little Red Dots. Maybe they're not stars powered by black hole accretion ... maybe they're globular clusters in formation! That's the suggestion in a new paper led by John Chisholm, anyway. It sounds impossible, but hear me out: π§ͺπβοΈ
19.02.2026 03:18
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I already reposted this earlier, but wanted to highlight the contributions of our @stsci.edu postdoc Pierluigi Rinaldi who is going hard after these LRDs & doing awesome work. His paper on Virgil is based in-part on our MIRI deep imaging survey, MIDIS, find it here: scixplorer.org/abs/2025ApJ.... π
17.02.2026 20:20
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Should I Stay or Should I Go? Clumps and Inward Migration
Something is missing in the middle. In JWST JADES galaxies, young clumps drop out in the inner regions, while clump structure shifts from the outskirts to the center.
From Niloofar Sharei @astroneal.bsky.social : Something is missing in the middle. In JWST JADES galaxies, young clumps drop out in the inner regions, while clump structure shifts from the outskirts to the center. βοΈ π βοΈ π§ͺ
astrobites.org/2026/02/11/s...
14.02.2026 01:30
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Why do we do astrophysics?
At time of writing, large language models (LLMs) are beginning to obtain the ability to design, execute, write up, and referee scientific projects on the data-science side of astrophysics. What implic...
David Hogg has written a white paper on doing astrophysics in the age of LLMs. It looks to be thought-provoking. My initial reaction is that either LLMs will destroy the field or they will force a reckoning with and re-imagining of the current system that often prioritizes output over quality. π§ͺ
12.02.2026 03:58
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I almost thought this was a cosmic web simulation! Look at those filaments and voids! π
10.02.2026 19:07
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This is what the most distant confirmed galaxy looks like. The light we're receiving was emitted when the Universe was ~15x smaller in linear size than today, and right now it's ~30 billion light-years away from us. The light was emitted when the Universe was <300 million years old. Pretty amazing!
06.02.2026 21:11
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Paper day!! Little Red Dots (LRDs) are seen everywhere by JWST, but even after 3 years of relentless effort we are still debating what these things actually are. We decompose LRDs to show LRD - Host Galaxy = Black Hole Star (BH*)! π§΅
arxiv.org/abs/2601.20929
π π§ͺ
01.02.2026 01:04
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JWST Users Committee
The JWST Users Committee provides user advice to the observatory as a whole and ensures operations proceed as expected to maximize the observatory's scientific performance.
The JWST Cycle 6 deadline will be September 30th. I don't think past JWST proposal deadlines have coincided with ground-based telescope deadlines.
I have expressed my concerns to the JWST User's Committee Chair and I encourage you to do the same. #astronomy π
www.stsci.edu/jwst/science...
31.01.2026 00:04
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IMF-related tensions are my favorite!Theyβre always interesting.
29.01.2026 20:11
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Feed the Fire, Fade the Metals
Are cosmic clumps βhomegrownβ, or fueled by fresh inflow? Todayβs authors find that star-forming clumps are usually more metal-poor than the disks around them.
From Niloofar Sharei @astroneal.bsky.social : Are cosmic clumps βhomegrownβ, or fueled by fresh inflow? Todayβs authors find that star-forming clumps are usually more metal-poor than the disks around them. βοΈ π βοΈ π§ͺ
astrobites.org/2026/01/27/f...
27.01.2026 22:19
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a substantial fraction of my adult life has now been spent watching the worst of the worst reshaping our world. This cannot go on
24.01.2026 23:00
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#IranMassacre :
Don't stop talking about Iran.
Don't stop talking about Iran.
Don't stop talking about Iran.
Don't stop talking about Iran.
Don't stop talking about Iran.
Don't stop talking about Iran.
#DigitalBlackoutIran
20.01.2026 09:14
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President Zelensky at Davos: βWhat will Iran become after this bloodshed? If the regime survives, it sends a clear signal to every bully: kill enough people and you stay in power.β
#Iran #IranMassacre
22.01.2026 15:19
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Adulthood: just needing someone to confirm youβre not crazy.
22.01.2026 01:15
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The Oldest Starlight
What if some of JWSTβs most extreme high-redshift galaxy candidates arenβt galaxies at all, but the explosive deaths of the very first stars?
From Lucie Rowland: What if some of JWSTβs most extreme high-redshift galaxy candidates arenβt galaxies at all, but the explosive deaths of the very first stars? βοΈπβπ§ͺ
astrobites.org/2026/01/16/t...
19.01.2026 11:17
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This is not a sudden uprising.
It is the result of decades of repression and resistance. Be a voice for a free Iran!
Artwork by @romina.zabihian
#IranProtests
16.01.2026 01:14
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In not-very-good news, extreme winds (114 mph gusts) on the early morning of the 25th caused significant damage to the 36" Great Refractor at Lick Observatory. Half of the main shutter broke off and landed on the main building.
27.12.2025 01:00
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I could make a list of all the different ways people have pronounced my name :))
25.12.2025 03:33
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Everyone should learn how to pronounce other people's names correctly as a basic rule to live by, but also - do it out of care! Isn't it cool to learn someone else's name, and to be given permission to use it? Don't you care enough about them to get it right?
24.12.2025 22:16
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Near-holidays activity: reorganizing my Slack channels by favorites (like it really matters!)
18.12.2025 01:05
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