Florent Renaud
banner
florenaud.bsky.social
Florent Renaud
@florenaud.bsky.social
Astrophysicist making galaxies crash and computers collide. Or the other way round 🔭

Research professor (directeur de recherche) in astrophysics at CNRS / Strasbourg Observatory, France 🇫🇷 🇪🇺
Did you know that the VLT is only 12 km away from the Pacific Ocean? Humidity and clouds are usually stopped by the steep mountain range below the telescopes, which enjoy clear skies at 2635 m.

[A few photos I took from a plane a couple of weeks ago. I won't come any closer this time 😭 ]
April 11, 2025 at 7:03 AM
That's reminds me that I have to clean my camera before going on a trip
Scrub a dub 🫧 ...except no scrubbing the delicate observatory optics!

We don't use cloths or lens cleaner to clean the giant camera lenses. Instead, our summit staff use a high-speed stream of carbon dioxide "snow" to push debris off of the glass surface.

🔭🧪
March 7, 2025 at 5:56 AM
The last observatories along my roadtrip in Chile. From above 5000 m, around the Cerro Toco in the Atacama desert. 🔭
January 3, 2025 at 4:19 PM
Construction site of the Extremely Large Telescope on top of Cerro Armazones (3060 m) - short drone video 🔭

youtu.be/zlYGN3GVc2Y?...
Extremely Large Telescope - Construction site
YouTube video by FunkyFloFlo around the globe
youtu.be
January 2, 2025 at 5:10 PM
22 km from Paranal, the Cerro Armazones Observatory (3060m) is getting ready to welcome our biggest eye on the sky! The European Extremely Large Telescope 🔭 (with a primary mirror of 39 m diameter) will start operations in 2028! The construction site is already very... sorry... extremely impressive!
January 2, 2025 at 7:54 AM
ESO observatory at Cerro Paranal (Atacama desert, Chile), from a distance 🔭
January 1, 2025 at 5:55 PM
🔭 TAO is the highest observatory in the world! Its extreme altitude even allows for infrared observations.
The 26m-tall dome hosts a 6.5m telescope.
I barely saw it from the main road tonight. Just a tiny white dot...
(ALMA is on the plateau, just below. Not visible from here 😥)
December 16, 2024 at 12:40 AM
Álvaro Segovia Otero is defending his PhD thesis "Star formation in cosmological simulations of Milky Way-like galaxies". I cannot be there, but I support him remotely (and my remote location is not too bad compared to cold Sweden!)
December 12, 2024 at 12:52 PM
How am I supposed to do proper astronomy with so much light in the sky? 🤪

[a few days ago, in the middle of the Icelandic highlands]
October 26, 2024 at 6:14 PM
When you're fed up showing always the same videos in conferences, it's time to make a new one!

In a gas-rich clumpy galaxy (maybe like the Milky Way 10 billion years ago), the gaseous structures are very complex and turbulent.

Not your grandma's interstellar medium. 🔭

youtu.be/aL6NjIkm7Dg
Stars and interstellar medium in a gas-rich galactic disk - Simulation
In gas-rich galaxies, the matter is not organized in the usual spiral patterns, but rather in a few massive gas-clumps. Such clumps, sometimes as big as dwar...
youtu.be
July 17, 2024 at 6:00 AM
Reposted by Florent Renaud
Beautiful JWST/NIRCam data processing of the Cartwheel galaxy and its surroundings by GiovanniAlbaniLattanzi (@GioAlbLat on X).
🔭 🧪
March 5, 2024 at 6:22 PM
18 done, 780 to go! 🔭
First segments of ELT’s main mirror arrive in Chile
First segments of ELT’s main mirror arrive in Chile
www.eso.org
January 17, 2024 at 9:48 AM
Happy new year to all!
Best wishes from Strasbourg, France
January 1, 2024 at 10:42 AM
Lund Uni is one of these magical places where moving people around and looking away solve harassment and violence. It hasn't worked for 16 years and 37+ complaints, but you never know! Now astronomy has been shut down and astronomers have been expelled...
www.nature.com/articles/d41...
How a bullying scandal closed a historic astronomy department
Lund University in Sweden reorganizes in the face of years of accusations against two professors. Lund University in Sweden reorganizes in the face of years of accusations against two professors.
www.nature.com
December 15, 2023 at 8:52 AM
Inaugural lecture of Sandrine Courtin, the new Marguerite Perey chair at the @unistra.bsky.social Institute for Advanced Study (USIAS), on nucleosynthesis in massive stars!

(and presentation of the 2023 fellows, inc. yours truly 😉)

#usias #astronomy #strasbourg #france2030
November 16, 2023 at 2:44 PM
I might have a slight impression of mild excitement to write a proposal. Is that a sign of seniority or senility?
November 2, 2023 at 8:19 AM
Still so much to explore, and so little time
If you work in the white parts of these maps, I'm available for invited seminars ...

(If you work in the colored parts too)

tenpages.github.io/us-level/us....
September 4, 2023 at 6:32 AM
Reposted by Florent Renaud
Here's an excellent article on bullying in academia by Wyn Evans in yesterday's THES www.timeshighereducation.com/opinion/bull...

This part seemed very familiar
August 31, 2023 at 7:56 AM
#OTD exactly 8 years ago, I saw my very first #northernlights from a plane over Greenland. Many cold nights later, I think my photo techniques have slightly improved 😜
August 27, 2023 at 6:02 PM