Sesh Nadathur
@seshnadathur.bsky.social
540 followers 410 following 690 posts
Astronomer, Associate Professor of cosmology at Portsmouth. Works on galaxy redshift surveys, from telescopes on remote mountaintops or in space. Dad, occasional climber, likes cricket. Occasionally has opinions.
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Reposted by Sesh Nadathur
coreyspowell.bsky.social
The Nobel Prize, widely considered the ultimate indicator of important science, has often gone off in weird directions due to politics & personalities.

Like that year when an obsolete form of color photography beat out quantum physics for the physics Nobel. 🧪

physicsworld.com/a/nobel-priz...
A still life taken by Lippmann using his method between 1890 and 1910. By the latter part of this period, the method had fallen out of favour, superseded by the simpler Autochrome process. (Photo in public domain)
seshnadathur.bsky.social
By the way, although it is a bit late, if you know a cosmologist who would like to use our cosmology chains and other data, they can now get them following the instructions here: www.desi.lbl.gov/2025/10/06/d...
seshnadathur.bsky.social
A special issue splash in Physical Review today on our DESI results:
promo.aps.org/desi_dr2
Which also contains a Featured in Physics viewpoint on the status of cosmology following DESI, by Matteo Viel: physics.aps.org/articles/v18...
DESI Collection
promo.aps.org
seshnadathur.bsky.social
Oh, apologies! You were asking a serious question, whereäs I treated it as an opportunity for humour. I must reënter this conversation afresh, with a more coöperative mindset.

I suggest naive.
seshnadathur.bsky.social
You need to reëxamine your prejudices against the New Yorker
Reposted by Sesh Nadathur
benansell.bsky.social
An actual quote from the Secretary of State for Business and Trade

Too often people go to university to ‘explore research and knowledge’

Look forward to Wes S saying 'too often people go to hospital to have operations' or Heidi Alexander saying 'too often people go to the station to catch a train'
seshnadathur.bsky.social
Lecturer A had amazingly found a way to use AI that would take even longer and be more work than just doing things without it.
ernestopriego.com
Simply astonishing. Maybe Lecturer A should not have to mark over 100 essays in a two-week window in the first place? Invest in qualified staff and reduce impossible workloads FFS www.kcl.ac.uk/about/strate...
Screenshot. King's College London page. Examples of effective practice

The following scenarios follow the above guidelines and offer insights into ways that academic staff can use AI transparently and in an assistive capacity, always ensuring human oversight and judgment remain central.
Scenario A – Scaling feedback while maintaining quality

Lecturer A is responsible for marking over 100 essays within a two-week window.

Conscious of the limitations this workload places on the depth of individual feedback, they adopt a hybrid approach using their university’s approved or supported LLM tool, Copilot.

Without ever uploading student work directly, Lecturer A composes an anonymised summary for each student, noting which marking criteria were met and the approximate percentage achieved for each. They input this summary alongside the official rubric into Copilot, prompting it to generate supportive, criterion-referenced feedback. This feedback is then carefully reviewed, adapted, and personalised before being uploaded to the marking platform.

Students are made aware of this process in advance and shown a demonstration, reinforcing transparency and trust.
seshnadathur.bsky.social
Today would have been the 100th birthday of the great BB King. I was reminded of this and so also remembered this lovely short film of him in London in 1972 (which you can watch on the iPlayer if you're in the UK: www.bbc.co.uk/iplayer/episode/m0023jmg)
B.B. King - Sounding Out - London 1972 [HD 720p]
YouTube video by Yesterdays Today
youtu.be
Reposted by Sesh Nadathur
levparikian.bsky.social
Regardless of everything else, Oblique Seville is one of the very best names. #TheAthletics
seshnadathur.bsky.social
(Everything else in the world is awful and depressing, so it is such a joy to have an hour of pure pleasure like this.)
seshnadathur.bsky.social
My wife is out with friends, so I'm watching season 3 of The Test - and my word that episode about the first Ashes test in 2023 is just amazing TV. Absolutely brilliant.
seshnadathur.bsky.social
I tried this experiment and I barely saw any "expressing either glee or satisfaction" 🤔 (I saw several disagreeing with things he said in life, which is hardly the same thing.)
Reposted by Sesh Nadathur
halushka.bsky.social
All illusions that russia wants only Ukraine — or that it would stop after getting the Donetsk region — should be gone after this blatant attack on Poland.

russia seeks to restore its borderless empire.

Ukraine's security is Europe's security.

Time to choose to defeat russia.
seshnadathur.bsky.social
I will be on The Sky at Night on BBC4 tonight, talking about dark energy and the expanding universe.

Here's a little clip from the conversation: www.bbc.co.uk/programmes/p...
BBC Four - The Sky at Night, The Expanding Universe, DESI Rewrites the Textbooks
Physics is different now?!
www.bbc.co.uk
seshnadathur.bsky.social
Something more specific regarding research practices and threatening letters.
seshnadathur.bsky.social
A little piece of free career advice for any astronomers: do not enter a scientific collaboration with anyone from the University of Florida astro department.
seshnadathur.bsky.social
You don't know how many years I've been waiting to make that joke!
seshnadathur.bsky.social
It's because you just can't make dad jokes before you have a child. If you do, that's a faux pa.
seshnadathur.bsky.social
Great news that as a collaboration we in DESI have been awarded the Lancelot M. Berkeley-New York Community Trust prize for meritorious work in astronomy for 2026! The citation specifically references our two BAO cosmology papers, which are very close to my heart 💜
seshnadathur.bsky.social
What I'm hearing is hope that being part of a larger department means access to resources that can smooth budgets across different time periods. Whereas currently the UKSA budget has no surplus at all, hence the abrupt cutoffs and short horizons.
seshnadathur.bsky.social
If it helps them to change the ridiculous situation where they can only budget funding for one year at a time (or shorter when there is a spending review - our current grant is getting extended in 6-month chunks) that can only be a good thing.
seshnadathur.bsky.social
What a great little documentary, that I was totally unaware of until today
seshnadathur.bsky.social
This is excellent, thank you!
seshnadathur.bsky.social
That city exists in a country.