Entering a Euclid era after Yannick is unsettling—and rightly so. His absence leaves a space that cannot be filled, only honored. Moving forward will demand temperance, balance, and composure as we carry on what he built. I hope we are ready to face it together. Euclid deserves nothing less.

He never saw Euclid’s first cosmology results, but he did see the very early—uncalibrated, handle with care—cosmic shear contours. I spent weeks wondering whether running those chains was the right thing to do. It now comforts me to know that he saw the mission in motion, despite its challenges.

Yannick was deeply thoughtful and a constant in the EC. He shaped its rhythm—steady, reassuring, quietly guiding—always caring about people as much as the science. We knew his health was fragile, yet he felt eternal, like those who hold a community together and make absence almost unimaginable.

“Guada, is it ok to use your plots for this presentation?”

“Guada, thanks a lot for your great plots!”

“Guada, great job with the new newsletter”

“Guada, have you found a new position? You’ll still be around, right? Where?”

“Guada, of course I’ll be happy to support this grant application”.

And enjoying the hospitality! Thanks again 💙

Special thanks to some of my dearest partners in crime around Bluesky @marcobonici.bsky.social @santicas.bsky.social