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Reposted by Denis Sergeev

RAS Journals @rasjournals.bsky.social · Jul 31

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

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.

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Denis Sergeev @meteodenny.bsky.social · Jul 30

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...

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

academic.oup.com

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Reposted by Denis Sergeev

s-ink Science Graphics @s-ink.org · Jun 10

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... 🔭

Exoplanets

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

s-ink.org

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Reposted by Denis Sergeev

Alejandro Soto @soto.space · Jun 10

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...

Advocacy Action Center

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

www.planetary.org

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Reposted by Denis Sergeev

European Space Agency @esa.int · May 14

🌦️ 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! 🔭 🧪

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...

www.esa.int

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Reposted by Denis Sergeev

⭐ ᗰᗩᖇᛕ ᗩ. ǤᗩᖇᒪIᑕᛕ ⭐ @markgarlick.com · May 1

Some of my most recent #spaceart. NOT AI.

Please repost. No new followers in ages. ☹️

#sciart #scicom #astronomy

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.

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Denis Sergeev @meteodenny.bsky.social · Apr 30

@stephenithomson.bsky.social published a paper on this

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Reposted by Denis Sergeev

Randall Munroe @xkcd.com · Apr 30

Jupiter Core xkcd.com/3083

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Reposted by Denis Sergeev

Dr Jake Taylor @astrojake.bsky.social · Apr 23

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 🔭🧪

arXiv bot (astro-ph) @krxiv-astro-ph.bsky.social · Apr 23

Are there Spectral Features in the MIRI/LRS Transmission Spectrum of K2-18b?
https://arxiv.org/pdf/2504.15916
Jake Taylor.

https://arxiv.org/abs/2504.15916

arXiv abstract link

arxiv.org

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Denis Sergeev @meteodenny.bsky.social · Apr 23

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

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Denis Sergeev @meteodenny.bsky.social · Apr 23

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

Denis Sergeev @meteodenny.bsky.social · Mar 26

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...

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).

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Reposted by Denis Sergeev

Sarah Hörst @planetdr.bsky.social · Apr 17

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

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Reposted by Denis Sergeev

Dr Ryan MacDonald @distantworlds.space · Apr 17

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

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

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Reposted by Denis Sergeev

Dr Stephen Thomson @stephenithomson.bsky.social · Mar 27

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...

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

www.exeter.ac.uk

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Denis Sergeev @meteodenny.bsky.social · Mar 26

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...

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Reposted by Denis Sergeev

Duncan Christie @astroduncan.bsky.social · Mar 7

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.

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.”…

arstechnica.com

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Reposted by Denis Sergeev

UNITED24 @u24.gov.ua · Feb 28

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Reposted by Denis Sergeev

Jenni Barclay @volcanojenni.bsky.social · Feb 8

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...

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

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Reposted by Denis Sergeev

Dan Lunt @climatesamwell.bsky.social · Feb 4

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

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Reposted by Denis Sergeev

Dr Ryan MacDonald @distantworlds.space · Jan 30

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).

Dr Ryan MacDonald @distantworlds.space · Dec 8

For anyone considering leaving the USA for *reasons*, I recently learned about this new UK visa for 'High Potential Individuals (HPI).

If you received a degree from a top 50 university in the last 5 years you can come to the UK *without* needing employment sponsorship.

www.gov.uk/high-potenti...

High Potential Individual (HPI) visa

Apply for a High Potential Individual (HPI) visa if you've been awarded a qualification by an eligible university in the last 5 years - eligibility, fees, documents, switch, bring your partner and chi...

www.gov.uk

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Reposted by Denis Sergeev

Prof Paul Williams @profpaul.bsky.social · Jan 30

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...

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Reposted by Denis Sergeev

Astrobites @astrobites.bsky.social · Jan 20

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...

Meteorology, Asteroseismology, and the Brunt-Väisälä Frequency - astrobites

Today’s bite tells a tale of how 1920s meteorology helps us peer inside pulsating stars.

astrobites.org

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Reposted by Denis Sergeev

ExoClimesVII @exoclimes.bsky.social · Jan 16

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 ☄️🔭🌌🪐

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Reposted by Denis Sergeev

ExoClimesVII @exoclimes.bsky.social · Jan 16

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...

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Reposted by Denis Sergeev

Dann Mitchell @climatedann.bsky.social · Jan 7

Definitely worth following @simonoxfphys.com - one of the best climate communicators out there. Check out the YouTube stuff in particular

Simon Clark @simonoxfphys.com · Jan 6

Hello Bluesky! If you've not seen my stuff before, I make YouTube videos about various topics in climate.
Here's my latest, exploring possible causes for global glaciation in the past:
youtu.be/lYE6LkS_2Go

What would it take for everywhere called Hell to freeze over?

YouTube video by Simon Clark

youtu.be

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