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Anke Ardern-Arentsen

@ankeaa.bsky.social
268 followers 131 following 54 posts

🇳🇱 Galactic Archaeologist 🔭✨, postdoc at the Institute of Astronomy in Cambridge. Married to @zachary-ardern.bsky.social, evolution-explorer

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Reposted by Anke Ardern-Arentsen
Taylor Smith @taylorjsmith.bsky.social · 01/10/2026
I’ve known about this for a couple of weeks, but now I can share: as of today, arXiv is rate-limiting submissions to two per month. And as a mod, I have to admit this is a necessary move (at least temporarily). blog.arxiv.org/2026/10/01/u...
blog.arxiv.org
Fair Moderation, Equitable Access, and AI: arXiv’s Updated Rate Limit Policy
arXiv, and the scientific community at large, are facing a watershed moment. Scholarly publishing is currently changing at a rapid pace, and we are seeing a…
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Royal Astronomical Society @royalastrosoc.bsky.social · 25/09/2026
Are formal conference proceedings still a valuable use of the astronomical community’s time and resources? That's what the IAU would like to get feedback about by inviting the global astronomical community to participate in an online survey. Take part here 👉️ iau.secure-platform.com/site/solicit...
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Anke Ardern-Arentsen @ankeaa.bsky.social · 08/09/2026
Looking forward to joining the University of Surrey as a Royal Society University Research Fellow in October! 🤩 Exciting times ahead studying ancient stars in the Milky Way! 🔭
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Sean Carroll @seanmcarroll.bsky.social · 03/09/2026
Everyone's favorite time of year: the Ig Nobel Prizes have been announced. Economics especially spicy this year. arstechnica.com/science/2026...
arstechnica.com
Meet the 2026 Ig Nobel Prize winners
The annual award ceremony features miniature operas, scientific demos, and "24/7" lectures.
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Anke Ardern-Arentsen @ankeaa.bsky.social · 02/09/2026
Submitted a paper that's been almost 10 years in the making! First PIGS photometric observations early 2017, photometric survey finished in 2023, several calibrations & recalibrations, many spectroscopic follow-up observations... Almost ready for the public release! 🔭✨🐷
Screenshot of the LaTeX paper title: "The Pristine Inner Galaxy Survey (PIGS) XII: Photometric data release and follow-up strategy for 4MOST"
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Anke Ardern-Arentsen @ankeaa.bsky.social · 13/08/2026
We had a bit of a scare with a thunderstorm ~1.5h before the eclipse, but it cleared up and it was so amazing! 🔭 🤩 And what a joy to watch it together with many other astronomers (attending the APOGEE/Majewski fest @ Teruel) - cheers and applause at totality!
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Reposted by Anke Ardern-Arentsen
Prof Anna Watts @profannawatts.bsky.social · 12/08/2026
Do note that the Sun will still be very bright even at the maximum ~90% coverage during this evening's partial eclipse in the Netherlands. Do not, under any circumstances, look directly at the Sun without proper eclipse glasses! You'll do irreparable damage to your eyes.
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Denis Erkal @derkal.bsky.social · 14/07/2026
And now the AAS job link: aas.org/jobregister/.... Please let me know if you have any questions about the position! 🔭☄️🧪
aas.org
Research Fellow in Stellar Streams | American Astronomical Society
The University of Surrey is a global community of ideas and people, dedicated to life-changing education and research.  We are ambitious and have a bold vision of what we want to achieve - shaping our...
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Reposted by Anke Ardern-Arentsen
Denis Erkal @derkal.bsky.social · 29/06/2026
Interested in working on stellar streams in the UK? I’ll be posting a 3 year postdoc position to work with me and Eugene Vasiliev on measuring dark matter subhalo properties with streams in a few days. Interviews will be in early August with a start date of October 1st. 🧪☄️
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Denis Erkal @derkal.bsky.social · 15/06/2026
Interested in applying for Astro fellowships in the UK? Come to Surrey! We are a fun group and will help you hone your application. Our deadline for ERF/URF consideration is July 8th. For more details of all the fellowships and how to contact us, see www.surrey.ac.uk/astrophysics... 🔭☄️
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Anke Ardern-Arentsen @ankeaa.bsky.social · 10/06/2026
Amazing news!! I'm lucky and grateful to have been taught by/mentored by/collaborated with all three ✨ What a time to be working in Galactic Archaeology!
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Giorgia Busso @giobusso.bsky.social · 07/05/2026
The beans have been spilled 🫘Gaia DR4 date is released! 2 December 2026, mark the date for another overwhelmingly huge release www.cosmos.esa.int/web/gaia/dat...
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Marieke Baan @mariekebaan.bsky.social · 19/02/2026
Werk! Op de afdeling van @ionica.mathstodon.xyz.ap.brid.gy en deels op de Sterrewacht Leiden careers.universiteitleiden.nl/job/Assistan...
careers.universiteitleiden.nl
Assistant professor on Astronomy & Society
Assistant professor on Astronomy & Society
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Reposted by Anke Ardern-Arentsen
Martin Bourne 🏳️‍🌈 @astromartin.bsky.social · 01/02/2026
I’m sure this does very little to assuage the concerns of people reliant on STFC funding, quite the opposite in fact. #astro
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University of Cambridge @cam.ac.uk · 14/01/2026
Undergraduates: Curious about a career in astronomy? 🔭 Take your first step with @cambridgeastro.bsky.social’s Summer Internship Programme and gain 8 weeks of research experience. Applications from underrepresented groups in astronomy are encouraged. Apply by 27 February 👇 bit.ly/4qYR0LD
Three individuals observing a telescope at the Institute of Astronomy in Cambridge. A text overlay reads: 'Are you looking for an astronomy internship at Cambridge?'
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Reposted by Anke Ardern-Arentsen
RAS Journals @rasjournals.bsky.social · 17/12/2025
Published in #RASTI RAS Techniques & Instruments: "The WEAVE-TwiLight-Survey: expanding WEAVE’s reach to bright and low-surface-density targets with a novel observing mode", Hajnik et al. This is Fig. 2: read the paper at academic.oup.com/rasti/articl... @royalastrosoc.bsky.social @academic.oup.com
Sky projection of the proto catalogues after applied magnitude cuts (see Section 3) in equatorial coordinates, constituting the superset from which the northern and southern WEAVE-TwiLight fields are derived. Red stars are part of the PLATO Long-duration Observation Phase (LOP) fields (V. Nascimbeni et al. 2022, 2025). Black circles and diamonds signify known exoplanet hosts and candidates, respectively. For orientation the Kepler FOV is overlaid in dark blue.
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Anke Ardern-Arentsen @ankeaa.bsky.social · 27/11/2025
Congrats to PhD student Thomas Hajnik for getting his first PhD paper out, which is also one of the first WEAVE papers! Thomas has been designing and testing a new observing mode for WEAVE, cleverly superimposing multiple field configurations to observe more efficiently ✨🔭 arxiv.org/abs/2511.21184
arxiv.org
The WEAVE-TwiLight-Survey: Expanding WEAVE's Reach to Bright and Low-Surface-Density Targets with a Novel Observing Mode
Current-day multi-object spectroscopic surveys are often limited in their ability to observe bright stars due to their low surface densities, resulting in increased observational overheads and reduced...
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Anke Ardern-Arentsen @ankeaa.bsky.social · 01/10/2025
Before being locked in a basement at the TNG offices for two days of WEAVE Science Processing & Analysis meeting (my first as part of the CASU team!), I managed to check out the southernmost tip of La Palma 🌋
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Michelle Collins @runningastronomer.bsky.social · 10/09/2025
Big news! @astroeth.bsky.social has his Nature paper on the Emergence of Globular Clusters out today! His simulations have globulars forming naturally, as well as some cool globular cluster like dwarfs! Check it out! 🔭🧪☄️ www.nature.com/articles/s41...
nature.com
The emergence of globular clusters and globular-cluster-like dwarfs - Nature
The results from a state-of-the-art suite of hydrodynamical cosmological zoom-in simulations show how globular clusters naturally emerge in the Standard Cosmology and also reveal the existence of a ne...
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Astronomy Picture of the Day 🪐 @apod.shinyakato.dev · 04/08/2025
🔭 Blue Arcs Toward Andromeda Image Credit & Copyright: Ogle et al. apod.nasa.gov/apod/ap25080...
The Andromeda Galaxy is shown just right of center, while some unusual blue arcs appear to its left. Please see the explanation for more detailed information.
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Astronomer Royal for Scotland | Catherine Heymans @astroroyalscot.bsky.social · 30/07/2025
Big day for the matriarchy! 🥳 Huge congrats to the awesome Prof. Doughtery, lead on the Jupiter-bound ESA JUICE mission & STFC Exec Chair. If anyone's confused on the astro royal hierarchy: Michele and I are the astro equivalents of 🇬🇧Westminster and 🏴󠁧󠁢󠁳󠁣󠁴󠁿Holyrood 🤗 ℹ️: www.bbc.co.uk/news/article... 👩‍🔬🔭🧪
bbc.co.uk
UK gets first female Astronomer Royal in 350 years
Prof Michele Dougherty is the first woman to be appointed to the influential post.
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Francesca Fragkoudi @astrofrancesca.bsky.social · 21/07/2025
Our sister institute at Durham, the Centre for Extragalactic Astronomy, are advertising for a five year lectureship position 🔭☄️ Advertisement is here, have a look and come join us in pretty Durham: durham.taleo.net/careersectio... #astrosci
durham.taleo.net
Lecturer in Observational Astronomy (Research %26 Education)
Click the link provided to see the complete job description.
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Royal Astronomical Society @royalastrosoc.bsky.social · 11/07/2025
Hanyuan Zhang won for the paper: "Kinematics and dynamics of the Galactic bar revealed by Gaia long-period variables" by Hanyuan Zhang, Vasily Belokurov, N Wyn Evans, Sarah G Kane, and Jason L Sanders. academic.oup.com/mnras/articl...
Hanyuan Zhang.
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RAS Journals @rasjournals.bsky.social · 09/07/2025
At NAM 2025 in Durham @nam25-durham.bsky.social Anke Ardern-Arentsen is speaking on Carbon-enhanced metal-poor stars as probes for early chemical enrichment. Anke has published in #MNRAS: academic.oup.com/mnras/articl...
academic.oup.com
Predicting metallicities and carbon abundances from Gaia XP spectra for (carbon-enhanced) metal-poor stars
ABSTRACT. Carbon-rich (C-rich) stars can be found at all metallicities and evolutionary stages. They are often the result of mass transfer from a companion
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21 Group @21group.bsky.social · 30/06/2025
"Ending bullying and precarity should be Cambridge chancellor’s focus" says Prof Wyn Evans "There is a need for University ombudsman to investigate cases of mismanagement or misconduct I urge my fellow candidates for chancellor to back this call" www.timeshighereducation.com/opinion/endi...
timeshighereducation.com
Ending bullying and precarity should be the Cambridge chancellor’s focus
In recent decades, the post has been seen as purely ceremonial. But there is precedent and justification for a more interventionist role, says Wyn Evans
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Institute of Astronomy, Cambridge @cambridgeastro.bsky.social · 30/06/2025
A story about Annie Walker, a 19th cent. astronomer who worked at the Cambridge Observatory, a forerunner to the IoA ... www.theguardian.com/science/2025...
theguardian.com
Unsung observatory worker was UK’s first professional female astronomer, experts say
Cambridge’s Institute of Astronomy is trying to find a photo of Annie Walker, who died in 1940, to give her star billing
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Georges Kordopatis @astrogeorges.bsky.social · 23/06/2025
Happy to announce that the line-detector.oca.eu website is now online! It allows the user to select the stellar type, [M/H], λ- range, and resolving power and the page returns: -purity of the line and minimum S/N required to detect it. -interactive plot to identify the lines in the spectra
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Anke Ardern-Arentsen @ankeaa.bsky.social · 11/06/2025
Nice view of the Sun 🌞 today from @cambridgeastro.bsky.social - thanks to Robin Catchpole 🔭
Picture of a TV screen showing the Sun through an H-alpha filter. Some nice solar prominences can be seen on the upper right
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21 Group @21group.bsky.social · 29/05/2025
Wyn Evans of 21 Group is standing If we can put together an alliance of everyone who is left out of decision-making in our universities, we can bring about real change In universities, power is controlled by a tiny elite Let's make this election about the principle of academic self-governance
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Institute of Astronomy, Cambridge @cambridgeastro.bsky.social · 16/05/2025
The 2025 Gruber Cosmology Prize has been awarded to Professor Max Pettini (IoA) and Professor Ryan Cooke (who is currently faculty at Durham, and was an IoA PhD student 2008-2011). www.ast.cam.ac.uk/news/2025-gr...
ast.cam.ac.uk
2025 Gruber Cosmology Prize awarded to Max Pettini and Ryan Cooke | Institute of Astronomy
The 2025 Gruber Cosmology Prize has been awarded to Professor Max Pettini (IoA) and Professor Ryan Cooke (who is currently faculty at Durham, and was an IoA PhD student 2008-2011). The collaboration t...
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Anke Ardern-Arentsen @ankeaa.bsky.social · 08/05/2025
Such a good view for a meeting room, and the view at the dinner was amazing too 😍 @ Pristine collaboration meeting, Nice Observatory @obscoteazur.bsky.social
A view of Nice city and the Mediterranean sea, framed by a window inside the Observatory library. There are clouds in the sky and some raindrops on the window, but the view is amazing. View of Nice by night, with many city lights below and still some sunset colours in the sky. Taken from Nice observatory, near the big dome (not visible)
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21 Group @21group.bsky.social · 25/04/2025
In person voting for Chancellorship of Cambridge will break for University's candidate If you did degree at Cambridge, you can vote online but must register beforehand Deadline to register for online voting is 2 May Act now Please repost to ensure wide electorate www.cam.ac.uk/about-the-un...
cam.ac.uk
How to register for online voting
You can vote in this election if: you have been awarded (in person or in absence) a qualifying degree (see also Degrees conferred under Statute B II 2) from the University of Cambridge at a degree
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Anke Ardern-Arentsen @ankeaa.bsky.social · 24/04/2025
Recommend going through your spam folder after an academic rejection: "The paper with the title (...) has left a deep impression on us", "We believe your insights would be highly valuable to our readership", "I understand that you are an outstanding researcher" ✨
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Payel Das @payeldas.bsky.social · 22/04/2025
Deadline is tomorrow!
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Paul McMillan @mcmillan-astro.bsky.social · 14/04/2025
This seems like a valuable use of the position of Chancellor of Cambridge University. I have nominated Wyn Evans and encourage anyone else eligible (anyone with a Masters or PhD from Cambridge) to do the same.
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Anke Ardern-Arentsen @ankeaa.bsky.social · 03/04/2025
For a recent outreach talk I created this visualisation of real stellar spectra (from the LAMOST survey) - showing a metal-rich, a very metal-poor, and a carbon-enhanced very metal-poor star with similar temperatures (~5000K). Look at those massive molecular carbon bands for the CEMP star! ✨🔭
The image shows three spectra from top to bottom (metal-rich, very metal-poor and carbon-enhanced very metal-poor, respectively), with each wavelength visualised by a coloured vertical line. The axis goes from ~380-700 nanometers. The metal-rich star has more and stronger dark lines than the metal-poor star, corresponding to absorption features. The carbon-enhanced metal-poor star has massive absorption bands, corresponding to molecular carbon absorption.
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Sera Markoff @profsera.bsky.social · 01/04/2025
I love all the fake astro papers on arXiv 🔭🧪 today! (thread of links) 1/ Feng Shui in the Universe: arxiv.org/pdf/2503.22800 One for the Swifties: arxiv.org/pdf/2503.22795 Kepler’s Platonic model after all: arxiv.org/pdf/2503.22793 Let’s just throw deep learning at it: arxiv.org/pdf/2503.22786
arxiv.org
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Francesca Fragkoudi @astrofrancesca.bsky.social · 31/03/2025
NAM abstract submission closes *today* don't forget to submit yours and join us in beautiful Durham in July! 🔭 #astrosci
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Matt Bothwell @mattbothwell.com · 27/03/2025
Spring is springing at the Institute of Astronomy!
A field of bright yellow daffodils, with a 1960s building in the background.
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Astro Plot of the Week @plotastro.bsky.social · 17/03/2025
Astronomy Plot of the Week is back! Submit a great plot/graph/diagram by tagging @plotastro.bsky.social It does not have to be yours, but it has to include a publicly accessible link (i.e. arXiv, ADS, etc.) 🔭
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Anke Ardern-Arentsen @ankeaa.bsky.social · 15/03/2025
I love singing with the #Cambridge University Gospel #Choir 😍 so enjoyed our concert at Great St Mary’s tonight! 🎶
All 21 choir members that participated in the concert, smiling and doing some spontaneous movements for the photo. We are wearing black & white and red scarves. The photo is taken in the front of Great St Mary’s Church.
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Astronomy Picture of the Day 🪐 @apod.shinyakato.dev · 13/03/2025
🔭 The Protostars within Lynds 483 Image Credit: NASA, ESA, CSA, apod.nasa.gov/apod/ap25031...
Two protostars are hidden in a single pixel near the center of a striking hourglass-shaped nebula in this near-infrared image from the James Webb Space Telescope. The actively forming star system lies in a dusty molecular cloud cataloged as Lynds 483, some 650 light-years distant toward the constellation Serpens Cauda. Responsible for the stunning bipolar outflows, the collapsing protostars have been blasting out collimated energetic jets of material over tens of thousands of years. Webb's high-resolution view shows the violence of star-formation in dramatic detail as twisting shock fronts expand and collide with slower, denser material. The premier close-up of the star-forming region spans less than 1/2 a light-year within dark nebula Lynds 483.
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Zachary Ardern @zachary-ardern.bsky.social · 12/03/2025
To live in Cambridge is to be surrounded by amazing built history. One favourite of mine is the Round Church, where I've had the privilege of speaking a couple of times. It was built approx. ~1130AD, likely before the first human settlement in my homeland of NZ 🤯 en.wikipedia.org/wiki/Church_...
The Round Church, Cambridge, in the evening, with the moon appearing behind the clouds
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Royal Astronomical Society @royalastrosoc.bsky.social · 03/03/2025
We're delighted to announce that applications are now being welcomed for the 2025 Caroline Herschel Prize Lectureship. 🔭🎓 The Lectureship was established to celebrate Caroline’s memory by supporting promising women astronomers early in their careers. 👩‍🔬 Find out more at: buff.ly/Njo7oIH
Text reads 'Caroline Herschel Prize Lectureship 2025' and includes the deadline of 30 April to apply by on a nebula background with comets and an image of Caroline Herschel.
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Anke Ardern-Arentsen @ankeaa.bsky.social · 04/03/2025
Having fun with a CD spectroscope and my old office desk lamp! Getting ready for the school kids visiting later this week for International Women’s Day ✨ 🔭
This is a photo of the CD based spectroscope using a paper folding mechanism to focus the light, which has a Gaia logoPicture of a spectrum of my desk lamp through the spectroscope slit. Distinct coloured lines can be seen
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Adrian Price-Whelan @adrian.pw · 03/03/2025
Re-upping this: @astropy.org is running our first user survey! If you use Astropy, please help us by filling this out and sharing it with your students / colleagues / collaborations / departments: forms.gle/dE3F6Rd8yTes... 🧪🔭
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Matt Bothwell @mattbothwell.com · 21/02/2025
Bad news for team asteroid, good news for squishy humans. Yay!
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Anke Ardern-Arentsen @ankeaa.bsky.social · 06/02/2025
Paper now published! 🎉 There are two fun new figures, showing how carbon-enhanced stars are offset from normal stars in the CMD (not a new result, but neat to see with this data) ✨ academic.oup.com/mnras/articl... (incl. mention to colour in figure descriptions...)
Gaia colour absolute-magnitude diagram for very metal-poor RGB stars, where carbon-rich stars (identified using Gaia XP, see the paper) are colour-coded by their carbon abundance. Carbon-rich stars follow a redder RGB sequence than carbon-normal stars.Gaia colour absolute-magnitude diagram for very metal-poor (left), intermediate metal-poor (middle) and metal-poor (right) stars in our spectroscopic reference sample, where carbon-rich stars are colour-coded by their carbon abundance. Carbon-rich stars follow a redder RGB sequence than carbon-normal stars.
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Matt Bothwell @mattbothwell.com · 05/02/2025
Great thread! There’s a small (but not zero) chance that 2024 YR4 becomes a menace. The bad news is that we might not know for sure until 2028. The good news is that we should be able to do something about it 😀🔭
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Anke Ardern-Arentsen @ankeaa.bsky.social · 23/01/2025
MNRAS now suggests to remove all mention of colour from figure captions. I understand not everyone sees every colour the same (and I try to make my figures colour-blind friendly), but isn't it still helpful to point out the different colours in the caption? What do people think? #astronomy
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