Daniel Pomarède

Cosmographer at University Paris-Saclay | co-discoverer of Laniakea (our home supercluster), Ho'oleilana, and some other (very) large scale structures 🌌 🔭 💻

[Daniel Pomarède @DanielPomarede]

Discovery alert!

A spherical shell-like structure 1 billion light-years in diameter named Ho’oleilana is discovered in the distribution of relatively nearby galaxies. We posit this is the 1st observation of an individual Baryon Acoustic Oscillation (BAO).
https://t.co/0fFuH7JeVH

[Daniel Pomarède @DanielPomarede]

in the #arXiv today

Cosmography of the Sloan Basin of Attraction and Neighborhood

by yours truly and co-authors

https://t.co/kHPk0NFcoL

#Cosmology

[Neil deGrasse Tyson @neiltyson]

With a 96-inch wingspan and the uncanny ability — at a height of 7’4” — to not just dunk the ball but also hit 3-pointers, “Wemby” (Victor Wembanyama) of the San Antonio @Spurs, is widely rumored to be a space Alien.

I am not authorized to comment further.

[Daniel Pomarède @DanielPomarede]

NASA Earth Observatory image of the day

One of the first images transmitted back to Earth from the #Artemis II mission was a stunner. In a single image, Earth’s full disk appears amid celestial phenomena that illustrate its place in the solar system.

https://t.co/9dg6q3AFIt

[Paris Saint-Germain @PSG_English]

🏆❤️💙

[Giro d'Italia Women @girowomen]

Demi Vollering celebrating 40 years of Super Mario. 🍄🎮🚴‍♀️

#GirodItaliaWomen #WonderfulWomen #WOW @demivollering @FDJ_SUEZ

[Daniel Pomarède @DanielPomarede]

SLS Booster Segments for Artemis III head to Kennedy

Credit: NASA/Brandon Hancock

#Artemis

[Daniel Pomarède @DanielPomarede]

Barnard's Galaxy (NGC 6822), a member of our Local Group of galaxies

Credits: data obtained using the MegaCam camera on the Canada-France-Hawaii Telescope; image by Jean-Charles Cuillandre (CFHT) & Giovanni Anselmi (Coelum); copyright © 2016 CFHT

https://t.co/etSuX3jRUx

[Luke - MANDO & GROGU IS HERE!! @lukesoutpost]

FIRST LOOK at the life-size N-1 Starfighter inside the lobby of George Lucas’ new Lucas Museum of Narrative Art.

Imagine walking into a museum and being greeted by a full-scale Naboo Starfighter. 🤯

The museum is set to open on September 22, 2026

[Daniel Pomarède @DanielPomarede]

Got a copy of Roland Lehoucq's latest book "Astronomie". It features a beautiful double-page rendering of Laniakea, our Home supercluster of galaxies, produced by Félix Pharand-Deschênes @Globaia

https://t.co/4uQH1GAyoj

[Lucas Museum of Narrative Art @lucasmuseum]

This is where the fun begins.

From the plaza of the Lucas Museum, visitors are greeted by the original N-1 Starfighter that was used in Star Wars: Episode I, featuring R2-D2 in position to pilot the craft and welcome you to the museum.

#LucasMuseum #GeorgeLucas #N1Starfighter #museum #sneakpeek

[Jessica Meir @Astro_Jessica]

This photo illustrates three phenomena that surprised me when I arrived on board the @Space_Station. I didn’t realize before seeing it with my own eyes that the Earth’s atmosphere would be so visible in the night sky, seemingly even more obvious at nighttime than daytime, nor that it would be so colorful! These orange and green colors on the horizon are airglow, a faint emission of light caused by chemical reactions and interactions between UV radiation and gases in our atmosphere (unlike aurora, which is caused by solar wind particles interacting with Earth’s magnetic field, airglow is present everywhere, all of the time). I was also surprised to see how blue and well lit the Earth can be at night, when a bright Moon illuminates it (Moonglow!). This photo was taken on May 30, the day prior to the full Moon. I hope that this provides a bit more @NASAArtemis Moon Joy for all of us!

[Dr Maggie Lieu @Space_Mog]

Radio Universe w/ Dr Emma Chapman short clip 2. Full video on my youtube @spacemog

[Daniel Pomarède @DanielPomarede]

Tiny little butte in the middle of the valley, captured in Stereo3D a few hours ago by Curiosity

To go 3D: eyes' lines of sight parallel, left image for left eye, right image for right eye.

Credit images: NASA/JPL-Caltech

#Mars

[UEFA Champions League @ChampionsLeague]

Paris go back-to-back 🏆🏆

#UCLfinal

[RMC Sport @RMCsport]

⭐⭐ 𝐋𝐄𝐆𝐄𝐍𝐃𝐀𝐈𝐑𝐄 !!!!!!!!

[Emmanuel Macron @EmmanuelMacron]

Une nouvelle étoile brille sur Paris ! Bravo au PSG qui fait rêver toute l’Europe. La France est fière.

[Daniel Pomarède @DanielPomarede]

Mars receding into darkness, captured yesterday by the Psyche spacecraft

#Psyche #Mars @MissionToPsyche

[Victor Glover @AstroVicGlover]

Great reason to put down devices, go outside, and be FULLy present.

[French Response @FrenchResponse]

Europeans tonight knowing none of their govs ever started a full-scale invasion against Ukraine 🌓

[Jan Vacek @JV_Honza]

Po delší době malá hádanka. Přiložená elevační mapka zobrazuje místo přistání jedné mise.