Denis Sergeev

See this full thread for all the ways we are showing how bad the STFC cuts to science will be With ways you can help us get the word out and just say no to cutting a generation of science and the foundation of future projects #science🧪 #astronomy🔭

Recently published in Fafnir - the Nordic Journal of Science Fiction and Fantasy: "Climate Models as a Retroactive and Exploratory World-building Tool" fafnir.journal.fi/article/view...

Thanks to
@johnfocook.bsky.social @climatedann.bsky.social and Alex and Michael Farnsworth.

Why do we do what we do the way we do what we do? In a narrow sense, LLMs are superhuman. They operate at computerish speeds and can now churn out text in seconds or minutes, that a human would take hours to write, if they could write it all. Thus…

Why do we do what we do the way we do what we do?

I mean, what *is* astrophysics?

diagrammonkey.wordpress.com/2026/02/17/w...

Thank you Steve!

@steveracemp.bsky.social as your constituent I am asking you to raise this issue in Parliament and help save physics research in the UK.

Open letter on astronomy cuts from UK physics teachers drupal-media[data-view-mode=half_page_width] { display: inline-block; width: 50%; } The Royal Astronomical Society is encouraging physics teachers in the UK to sign ...

Are you a physics teacher in the UK? We need your help! 🧑‍🔬🧑‍🏫

We've created an open letter for teachers to sign and express their grave concern at the devastating proposed cuts to astronomy, space science and particle and nuclear physics.

✍️ 👉️ ras.ac.uk/news-and-pre...

#STFC #UKRI

Dayside average (a) air temperature, (b) cloud ice, (c) cloud liquid water, and (d) graupel as a function of height in our M09 simulations for the surface pressure of 0.25, 0.5, 1, 2, 4, 10 bar. The figure shows that with increasing surface pressure, the lapse rate becomes larger, the cloud water content diminishes, while the graupel content does not show a clear trend. Note that because the dry atmospheric mass differs between our simulations, the increase in the mass mixing ratios with pressure in this figure appears much greater than the increase in the vertically integrated cloud content shown in Figs 1(c) and 3.

Published in #MNRAS: "Lightning activity on a tidally locked terrestrial exoplanet in storm-resolving simulations for a range of surface pressures", Sergeev et al. This is Fig. 4: to read the paper please visit academic.oup.com/mnras/articl... @oxfordacademic.bsky.social @royalastrosoc.bsky.social

Lightning activity on a tidally locked terrestrial exoplanet in storm-resolving simulations for a range of surface pressures ABSTRACT. Cloudy atmospheres produce electric discharges, including lightning. Lightning, in turn, provides sufficient energy to break down air molecules i

Fresh off the press: lightning activity in high-res simulations for TRAPPIST-1e! Just a nice little study that began as James's and Lottie's undergraduate research project. We find less lightning for higher surface pressures. It's only one model though!

academic.oup.com/mnras/articl...

Exoplanets The collection of known Exoplanets represented based on their date of detection and their relative size to scale.

Over 5,000 worlds we’ve seen beyond our sky,
Some could host life, some just float by! 🌍🪐
Gas giants, lava lands, icy charms,
The universe is full of alien farms! 👽✨

#Exoplanets!

s-ink.org/known-exopla... 🔭

Advocacy Action Center The Planetary Society is organizing a new space constituency that is educated, empowered, and loud.

If you are interested in supporting NASA science and exploration, and saving it from capricious budget cuts, here's one thing you can do: sign this petition being sent to Senate and House members of their respective appropriations committees. Two days left to sign!

www.planetary.org/advocacy-act...

Titan forecast: partly cloudy with a chance of methane showers A science team has combined data from the NASA/ESA/CSA James Webb Space Telescope and the Keck II telescope to see evidence of cloud convection on Saturn’s moon Titan in the northern hemisphere for th...

🌦️ Webb's Titan forecast: partly cloudy with occasional methane showers.

A science team has combined data from the NASA/ESA/CSA James Webb Space Telescope and the Keck II telescope to see evidence of cloud convection on Saturn’s moon Titan in the northern hemisphere for the first time! 🔭 🧪

Digital illustration of the black hole. Created in Blender and Photoshop. © Mark A. Garlick.

Digital illustration of a coronal mass ejection on the Sun. Created in Blender and Photoshop. © Mark A. Garlick.

Digital illustration of the Europa Clipper spacecraft, seen with the limb of the Jovian Moon Europa behind it, and Jupiter farther in the distance. Created in Blender and Photoshop. © Mark A. Garlick.

Digital illustration of the planet Mars during its Noachian period, some 4100-3700 million years ago. Olympus Mons and the Tharsis volcanoes are active but not yet at their modern sizes. The canyon Valles Marineris is just beginning to form. Created in Blender and Photoshop. © Mark A. Garlick.

Some of my most recent #spaceart. NOT AI.

Please repost. No new followers in ages. ☹️

#sciart #scicom #astronomy

@stephenithomson.bsky.social published a paper on this

Jupiter Core xkcd.com/3083

I wrote a research note about the recent publication of the MIRI/LRS spectrum of K2-18b. The authors had claimed the detection of potential signs of life. I find the data to be consistent with a flat line 🔭🧪

The martians
(Or maybe @themartian.bsky.social)

Less than a month till the deadline to apply for this PhD place!

Sarah’s rules of looking for life with only chemical signatures:

1) the smaller the molecule(s) the more likely they can also be produced by abiotic processes

2) one molecule, if it can be produced by any abiotic process, will never be enough to definitively claim detection of life

Artist's impression of the exoplanet K2-18b. Credit: A. Smith, University of Cambridge.

𝗡𝗼, 𝗮 𝗯𝗶𝗼𝘀𝗶𝗴𝗻𝗮𝘁𝘂𝗿𝗲 𝘄𝗮𝘀 𝗻𝗼𝘁 𝗷𝘂𝘀𝘁 𝗱𝗲𝘁𝗲𝗰𝘁𝗲𝗱 𝗶𝗻 𝗞𝟮-𝟭𝟴𝗯'𝘀 𝗮𝘁𝗺𝗼𝘀𝗽𝗵𝗲𝗿𝗲.

K2-18b is back in the news, now with a bold claim that biosignature molecules (DMS and/or DMDS) have been 'detected at 3σ'.

Most exoplanet astronomers are extremely sceptical about these claims, let's see why (1/n).

🔭🧪🪐 #exoplanet

Award details | Funding and scholarships for students | University of Exeter

We're advertising 2 fully-funded PhD positions in atmospheric science @exeter.ac.uk for entry in September 2025. Both are open to UK and international appliants.
The first project is with me looking at Atmospheric heat transport across a range of planetary climates
www.exeter.ac.uk/study/fundin...

3D visualisation of dust and wind currents in the atmosphere of Mars as simulated by the UK Met Office Unified Model. Image credit: Danny McCulloch (U. Exeter).

Exciting PhD opportunity at @exeter.ac.uk: Forecasting Martian Dust Storms (funded by @ukspaceagency.bsky.social)! Please share widely!

More details: www.exeter.ac.uk/study/fundin...

White House may seek to slash NASA’s science budget by 50 percent “It would be nothing short of an extinction-level event for space science.”…

This account is biased towards my professional interests, so with the caveat there are a litany of reasons to protest those in power in the US, GO PROTEST. Keep protesting. Protest until there is actual change.

Graphic from the TeamX website illustrating atmospheric flow, boundary layers and exchange over mountains

Exciting opportunity to gather, work with and model orographic 🗻💨🗻flow in the European Alps as part of the TeamX (www.teamx-programme.org ) project based at UEA vacancies.uea.ac.uk/vacancies/14...

We are really pleased to announce a 3-year postdoc at Bristol to work on tuning a state-of-the-art CMIP7 model using paleoclimate data, and using the tuned model to make future climate predictions.
More details available from me, or here: tinyurl.com/mvx5wmet .
Closing date: 15th Feb

Resharing this UK Visa route for recent US university graduates (undergrad or PhD), for anyone who may need to leave the US on short notice (3 week decision time).

The fantastic podcast "Countering Climate Skepticism" has reached its 17th episode.

Co-presented by my former PhD student Mark, it is well worth a listen.

It will help you identify and counter the dizzying array of denial arguments peddled by clueless folk.

ccspod.podbean.com/e/ep17-summa...

Meteorology, Asteroseismology, and the Brunt-Väisälä Frequency - astrobites Today’s bite tells a tale of how 1920s meteorology helps us peer inside pulsating stars.

From Tom Wagg: Today’s bite tells a tale of how 1920s meteorology helps us peer inside pulsating stars. ✨🔭
astrobites.org/2025/01/20/b...

Registration deadline for #ExoclimesVII is coming up!🚀 Make sure to submit your application before next Friday, January 24th! Fill out the google form here: docs.google.com/forms/d/e/1F...

And make sure to check out our website for more information! exoclimes.org ☄️🔭🌌🪐

ExoSLAM summer school aims to introduce attendees to low- and high-resolution data analysis, as well as an introduction to current uses of machine learning in astronomy!

Make sure to stay tuned for more announcements of the program!

exoclimes.org/exoslam/inde...