Franck Marchis
@AllPlanets
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Planetary astronomer at @SETIInstitute, CEO and co-founder of @skymapperspace, CSO and co-founder of @Unistellar, tweeting about space, our planet & us, humans
San Francisco
Joined August 2010
Here we are, alone in space on a spaceship we call Earth. I am disheartened; I thought by now we would have found our cosmic brothers and sisters to share our challenges, joys, and defeats with. But no, we are floating in this galaxy, arguing about our tiny lives and wasting the
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RT @SETIInstitute: In a recent SETI Live, SETI Institute astronomers @allplanets and @astro_sgro discussed two rare and compelling discover….
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This morning I learned of the passing of my colleague, physicist Claudio Maccone, former chair and long-standing member of the SETI Permanent Committee. I will remember our many discussions on the evolution of civilizationsm a topic he cared about deeply, as I do, his tireless.
E’ morto il fisico Claudio Maccone: progettò un radiotelescopio per il lato nascosto della luna @LaStampa.
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RT @Skymapperspace: Nothing gets past SkySphere. In a test by @AllPlanets & Amaresh Kollipara, our all-sky camera tracked a drone from low….
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L’affaire Jean #Pormanove est sordide. Elle révèle une France qui, au lieu d’investir dans son avenir, a laissé une jeunesse sans ambition se repaître de violence gratuite, tout en attendant tout de l’État. Un pays qui accepte de surpayer des organismes inutiles (ARCOM) pleins.
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RT @SETIInstitute: Our recent #SETILive wasn't the first time we talked about an exoplanet in the habitable zone around Alpha Centauri. Fou….
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Science is messy, uncertain, and self-correcting — and that’s its strength. Retractions shouldn’t be used to sanitize history, but to uphold integrity. Let the record show how discovery really happens. 3/3.
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Even if the claim didn’t hold, it pushed the field forward: new experiments, better instruments, sharper questions. That’s how science works. We shouldn’t pretend otherwise. 2/3.
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Retracting the “arsenic life” paper 15 years later is too late. Science advances through debate & replication, not by rewriting history to look cleaner. Controversy drives progress—erasing it doesn’t. @ScienceMagazine 1/3.
science.org
Belated decision on widely disputed 2010 study pleases some critics but puzzles and dismays others
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RT @SETIInstitute: We’re not alone. What are we going to do about it? . In July 2025, 3I/ATLAS, a fast-moving interstellar object, entered….
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RT @SETIInstitute: Citizen Science in Astronomy (Part 7): Comet 3I/ATLAS and a disintegrating exoplanet
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RT @Skymapperspace: Our CEO @AllPlanets joins Dr. Lauren Sgro from the @SETIInstitute to talk citizen science in action - comets, exoplanet….
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RT @Unistellar: Join us tomorrow Aug 14 at 11am PDT for a Q&A on Citizen Science with Dr. Marchis @AllPlanets and Dr. Sgro @astro_sgro! The….
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RT @jamestalarico: I just went on Fox News to tell the truth about the redistricting power grab in Texas. I asked a simple question: “If R….
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RT @SETIInstitute: Next #SETILive: Closest Exoplanet Yet?.TODAY, 8 August, 3:15 pm PDT / 6:15 pm EDT. Join astronomers @allplanets and @dju….
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My first Small Satellite Conference and it’s amazing to see the field transformed by bold projects and young, talented international entrepreneurs seizing the new space industry’s opportunities. #smallsat25
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RT @Skymapperspace: Good vibes and deep convos as @SmallSat is in full swing in Salt Lake City. If you're in Utah, don't miss the chance t….
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Closest Exoplanet Yet? JWST Reveals Neighboring Planet Candidate - A Special SETI Live by the @SETIInstitute with J. Girard from STSCI and myself to talk about the great discovery of a planet candidate around Alpha Centauri A.
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RT @Skymapperspace: 🪐A new world next door?. JWST may have found a Saturn-mass planet orbiting Alpha Centauri A - a mere 4 light-years away….
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