Andrey Kravtsov
@grumpy1.bsky.social
Food for thought/discussion.
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November 13, 2025 at 7:41 PM
Food for thought/discussion.
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Aurora over lake Michigan tonight. In the background are Castor, Pollux, Jupiter, and Procyon.
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November 12, 2025 at 4:34 AM
Aurora over lake Michigan tonight. In the background are Castor, Pollux, Jupiter, and Procyon.
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Reposted by Andrey Kravtsov
![Comic. PERSON 1 with white hat: How tall are you? PERSON 2: 5ft 24cm [caption] When switching to metric, make the process easier by doing it in steps.](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:cz73r7iyiqn26upot4jtjdhk/bafkreifptvo6h6kdpf75j3i443ospzumiii7a3pblah2urjrawmyymh3ga@jpeg)
November 6, 2025 at 11:33 PM
Reposted by Andrey Kravtsov
Euclid’s “Tuning Fork”
By way of a quick follow-up to yesterday's post, here's another Euclid Q1 product. This one is an updated version of the famous "Tuning Fork" representation of galaxy morphology: Credits: Diagram: ESA/Euclid/Euclid Consortium/NASA, Diagram by J.-C. Cuillandre, L. Quilley, F.…
By way of a quick follow-up to yesterday's post, here's another Euclid Q1 product. This one is an updated version of the famous "Tuning Fork" representation of galaxy morphology: Credits: Diagram: ESA/Euclid/Euclid Consortium/NASA, Diagram by J.-C. Cuillandre, L. Quilley, F.…
Euclid’s “Tuning Fork”
By way of a quick follow-up to yesterday's post, here's another Euclid Q1 product. This one is an updated version of the famous "Tuning Fork" representation of galaxy morphology: Credits: Diagram: ESA/Euclid/Euclid Consortium/NASA, Diagram by J.-C. Cuillandre, L. Quilley, F. Marleau. Images alone: ESA/Euclid/Euclid Consortium/NASA, image processing by J.-C. Cuillandre, E. Bertin, G. Anselmi You can click on the image to make it (much) bigger.
telescoper.blog
November 7, 2025 at 2:56 PM
Euclid’s “Tuning Fork”
By way of a quick follow-up to yesterday's post, here's another Euclid Q1 product. This one is an updated version of the famous "Tuning Fork" representation of galaxy morphology: Credits: Diagram: ESA/Euclid/Euclid Consortium/NASA, Diagram by J.-C. Cuillandre, L. Quilley, F.…
By way of a quick follow-up to yesterday's post, here's another Euclid Q1 product. This one is an updated version of the famous "Tuning Fork" representation of galaxy morphology: Credits: Diagram: ESA/Euclid/Euclid Consortium/NASA, Diagram by J.-C. Cuillandre, L. Quilley, F.…
(Adler) Planetarium eclipse...
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November 7, 2025 at 6:24 PM
(Adler) Planetarium eclipse...
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"Beyond Hubble": a workshop aimed to trigger cross discussions between observers and theorists on our current understanding on galaxy morphology and kinematics, with an emphasis on revisiting the Hubble Sequence in the modern-day galaxy formation framework.
sites.google.com/cam.ac.uk/be...
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sites.google.com/cam.ac.uk/be...
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October 24, 2025 at 3:40 PM
"Beyond Hubble": a workshop aimed to trigger cross discussions between observers and theorists on our current understanding on galaxy morphology and kinematics, with an emphasis on revisiting the Hubble Sequence in the modern-day galaxy formation framework.
sites.google.com/cam.ac.uk/be...
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sites.google.com/cam.ac.uk/be...
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Reposted by Andrey Kravtsov
Reposted by Andrey Kravtsov
So how much of the £2356 you charge per paper goes to these "essential" peer reviewers?
We have some more quotes from our #MNRAS Scientific Editors for Peer Review Week 2026 @oxfordacademic.bsky.social @royalastrosoc.bsky.social
September 17, 2025 at 10:01 PM
So how much of the £2356 you charge per paper goes to these "essential" peer reviewers?
Reposted by Andrey Kravtsov
August 28, 2025 at 8:00 AM
Reposted by Andrey Kravtsov
a BEAUTIFUL image of spiral galaxy ngc 1068 that uses combined data from hubble, jwst, AND chandra telescopes!!!! 🌌
August 19, 2025 at 11:13 PM
a BEAUTIFUL image of spiral galaxy ngc 1068 that uses combined data from hubble, jwst, AND chandra telescopes!!!! 🌌
I used this from the Opticks in my PhD thesis:
it seems probable to me that God in the Beginning form'd Matter in solid, massy, hard, impenetrable Particles of such Sizes and Figures and with such other Properties and in such Proportion to Space as most conduced to the End for which he form'd them
it seems probable to me that God in the Beginning form'd Matter in solid, massy, hard, impenetrable Particles of such Sizes and Figures and with such other Properties and in such Proportion to Space as most conduced to the End for which he form'd them
August 20, 2025 at 4:42 AM
I used this from the Opticks in my PhD thesis:
it seems probable to me that God in the Beginning form'd Matter in solid, massy, hard, impenetrable Particles of such Sizes and Figures and with such other Properties and in such Proportion to Space as most conduced to the End for which he form'd them
it seems probable to me that God in the Beginning form'd Matter in solid, massy, hard, impenetrable Particles of such Sizes and Figures and with such other Properties and in such Proportion to Space as most conduced to the End for which he form'd them
Reposted by Andrey Kravtsov
Reading a section of Newton's "Opticks", I think he should have enlisted ChatGPT to help him with his spelling.
August 19, 2025 at 9:36 PM
Reading a section of Newton's "Opticks", I think he should have enlisted ChatGPT to help him with his spelling.
A new fantastic image of M82 by JWST NIRCam, showing a biconical outflow of gas and dust from this starbursting galaxy.
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esawebb.org/images/potm2...
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esawebb.org/images/potm2...
June 30, 2025 at 9:20 PM
A new fantastic image of M82 by JWST NIRCam, showing a biconical outflow of gas and dust from this starbursting galaxy.
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esawebb.org/images/potm2...
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esawebb.org/images/potm2...
Reposted by Andrey Kravtsov
I have completed my contributions to this field thank you
Definitely using the novel Ji (@alexji.bsky.social) mass-based dwarf galaxy classification scheme moving forward 🔭
June 24, 2025 at 5:36 PM
I have completed my contributions to this field thank you
Reposted by Andrey Kravtsov
June 24, 2025 at 10:21 AM
Reposted by Andrey Kravtsov
Want to instead explore the Virgo Cluster as captured by Rubin at full resolution? Head to our Skyviewer and enjoy some cosmic joyscrolling! There's so much to explore and discover ✨ #RubinFirstLook #CaptureTheCosmos 🔭🧪
➡️ skyviewer.app
➡️ skyviewer.app
June 23, 2025 at 7:30 PM
Want to instead explore the Virgo Cluster as captured by Rubin at full resolution? Head to our Skyviewer and enjoy some cosmic joyscrolling! There's so much to explore and discover ✨ #RubinFirstLook #CaptureTheCosmos 🔭🧪
➡️ skyviewer.app
➡️ skyviewer.app
Wow, @phdcomics.com in conversation with @xkcd.com talking about the worst place to live in the galaxy?
This might be the nerdiest podcast ever recorded.
Listen to the full episode here: link.podtrac.com/SciStuff_XKCD
This might be the nerdiest podcast ever recorded.
Listen to the full episode here: link.podtrac.com/SciStuff_XKCD
June 5, 2025 at 1:30 PM
Reposted by Andrey Kravtsov
NEW: Astronomers used Hubble to re-examined the prediction that the Milky Way galaxy will eventually collide with the Andromeda galaxy. They find there is only a fifty-fifty chance the two galaxies will smash together within the next 10 billion years: bit.ly/3YzymOx 🔭 🧪
June 2, 2025 at 3:03 PM
NEW: Astronomers used Hubble to re-examined the prediction that the Milky Way galaxy will eventually collide with the Andromeda galaxy. They find there is only a fifty-fifty chance the two galaxies will smash together within the next 10 billion years: bit.ly/3YzymOx 🔭 🧪
Reposted by Andrey Kravtsov
The science paper publication industry gives millions in revenues to the publishers, but is created for free by the experts. The value-add of publication (what people pay for) is much less than that of peer-review and editorial (which they don't).
It is ripe for disruption. Hopefully like this.
It is ripe for disruption. Hopefully like this.
This may not be obvious, but a paper like the Naidu et al on the new distance record holder galaxy
arxiv.org/abs/2505.11263
would normally be submitted to Nature. The fact that it was submitted to the @ojastro.bsky.social signals a major shift in the field.
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arxiv.org/abs/2505.11263
would normally be submitted to Nature. The fact that it was submitted to the @ojastro.bsky.social signals a major shift in the field.
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A Cosmic Miracle: A Remarkably Luminous Galaxy at $z_{\rm{spec}}=14.44$ Confirmed with JWST
JWST has revealed a stunning population of bright galaxies at surprisingly early epochs, $z>10$, where few such sources were expected. Here we present the most distant example of this class yet -- MoM...
arxiv.org
May 19, 2025 at 4:19 PM
The science paper publication industry gives millions in revenues to the publishers, but is created for free by the experts. The value-add of publication (what people pay for) is much less than that of peer-review and editorial (which they don't).
It is ripe for disruption. Hopefully like this.
It is ripe for disruption. Hopefully like this.
This may not be obvious, but a paper like the Naidu et al on the new distance record holder galaxy
arxiv.org/abs/2505.11263
would normally be submitted to Nature. The fact that it was submitted to the @ojastro.bsky.social signals a major shift in the field.
🔭🧪
arxiv.org/abs/2505.11263
would normally be submitted to Nature. The fact that it was submitted to the @ojastro.bsky.social signals a major shift in the field.
🔭🧪
A Cosmic Miracle: A Remarkably Luminous Galaxy at $z_{\rm{spec}}=14.44$ Confirmed with JWST
JWST has revealed a stunning population of bright galaxies at surprisingly early epochs, $z>10$, where few such sources were expected. Here we present the most distant example of this class yet -- MoM...
arxiv.org
May 19, 2025 at 3:36 PM
This may not be obvious, but a paper like the Naidu et al on the new distance record holder galaxy
arxiv.org/abs/2505.11263
would normally be submitted to Nature. The fact that it was submitted to the @ojastro.bsky.social signals a major shift in the field.
🔭🧪
arxiv.org/abs/2505.11263
would normally be submitted to Nature. The fact that it was submitted to the @ojastro.bsky.social signals a major shift in the field.
🔭🧪
Reposted by Andrey Kravtsov
A galaxy at redshift z=14.44?
This morning's arXiv mailing presented me with a distraction from examination marking in the form of a paper by Naidu et al. with this abstract: This paper has been submitted to the Open Journal of Astrophysics. I usually feel a bit conflicted in situations when a…
This morning's arXiv mailing presented me with a distraction from examination marking in the form of a paper by Naidu et al. with this abstract: This paper has been submitted to the Open Journal of Astrophysics. I usually feel a bit conflicted in situations when a…
A galaxy at redshift z=14.44?
This morning's arXiv mailing presented me with a distraction from examination marking in the form of a paper by Naidu et al. with this abstract: This paper has been submitted to the Open Journal of Astrophysics. I usually feel a bit conflicted in situations when a paper has been submitted for editorial review. I am posting it here for two reasons: one is that I am not the Editor responsible for this paper; the other is that the…
telescoper.blog
May 19, 2025 at 1:30 PM
A galaxy at redshift z=14.44?
This morning's arXiv mailing presented me with a distraction from examination marking in the form of a paper by Naidu et al. with this abstract: This paper has been submitted to the Open Journal of Astrophysics. I usually feel a bit conflicted in situations when a…
This morning's arXiv mailing presented me with a distraction from examination marking in the form of a paper by Naidu et al. with this abstract: This paper has been submitted to the Open Journal of Astrophysics. I usually feel a bit conflicted in situations when a…
not yet sure whether this is useful at all, but an interesting concept: each arXiv paper is a star and the nearest stars are papers on related topics:
soarxiv.org
It only has papers up to April 2025 rn (if you lose your cursor, hit Esc to recover it).
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soarxiv.org
It only has papers up to April 2025 rn (if you lose your cursor, hit Esc to recover it).
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soarXiv - the universe of science
soarXiv is a visual exploration of the arXiv, a repository of scientific papers. It is a tool for exploring the arXiv in a new way, and for finding new papers to read.
soarxiv.org
May 19, 2025 at 3:21 PM
not yet sure whether this is useful at all, but an interesting concept: each arXiv paper is a star and the nearest stars are papers on related topics:
soarxiv.org
It only has papers up to April 2025 rn (if you lose your cursor, hit Esc to recover it).
🔭
soarxiv.org
It only has papers up to April 2025 rn (if you lose your cursor, hit Esc to recover it).
🔭
If your next European adventure does not pan out, Illinois has alternatives to offer...
March 2, 2025 at 12:26 AM
If your next European adventure does not pan out, Illinois has alternatives to offer...