Linn Boldt-Christmas

🇸🇪 Exoplanet atmospheres + chemistry at @UU_University with @ESO 🪐🔭 Also into astrobiology, rockets, climate, equality/EDI, and #scicomm ✨ (she/her) 💙☁️

[Linn Boldt-Christmas @nplinnspace]

Genuinely heartbroken to be leaving @ESO VLT after 5 nights here — I now love these telescopes like they’re my children 🥺❤️ Hope to be back soon!

[Itai Yanai @ItaiYanai]

Science has a hypothesis-testing part, but it has an equally crucial ‘night science’ mode, where new ideas are improvised for the first time.

[Dr Lisa Đặng @Astro_LisaDang]

🚨@ExoclimesVII is coming to @iExoplanets
@UMontreal on 7-11 July 2025 Join us in discussing all things climate from solar system to #exoplanets & brown dwarfs! Please fill out this interest form to stay informed https://t.co/H0h6bik77x

[Linn Boldt-Christmas @nplinnspace]

@toomanyspectra @That_Astro_Chic This is so creative! I’d love a copy if there is one please, I’ll try to fit it into an activity/lecture of my undergraduate astrobiology course next term ✨🌱🪐 Thank you!!!

[Linn Boldt-Christmas @nplinnspace]

@AstroDaria It takes a lot of strength to share this, and it takes even more strength to live this. So glad to hear that you're on a better track today ❤️ And remember: everything will always be alright in the end; and if it's not alright, it's not the end.

[Abi Frost @AstroDrFrost]

Despite the differences in our fields and seniority, so much of this is relatable ☹️ 🧵

[Guadalupe Cañas-Herrera @guadalupecah]

Speechless.

This is just a small teaser of what cosmologists have been patiently waiting for the last decade.

Please, do yourself a favour and check out the video at https://t.co/TLYNykrWI6

[Jonathan O’Callaghan @Astro_Jonny]

Spacecraft currently on their way to destinations around the Solar System:

Hayabusa2 (asteroid 1998 KY26)
BepiColombo (Mercury)
OSIRIS-REx (Apophis)
Lucy (Jupiter asteroids)
Psyche (16 Psyche)
JUICE (Jupiter)
Hera (Dimorphos-Didymos)
Europa Clipper (Jupiter)

[NSF-DOE Rubin Observatory @VRubinObs]

We have a telescope!🤩

Last week, summit staff successfully installed Rubin Observatory's combined primary/tertiary mirror.

With all three mirrors & the commissioning camera in place, we officially—for the first time in 15 years of construction—have a complete telescope!🥳

🧵

[David K Smith @professor_dave]

So she was first author on his key paper - in fact she's on most of his key papers, yet she didn't get the Nobel Prize, in spite of the fact they could have given 3 awards, not just 2. Explain to me how STEM is not institutionally sexist.

[ESO @ESO]

📢 Breaking news! ESO's #VLT has discovered a planet around the closest single star to our Sun! 🪐🔭

https://t.co/xepUlivtiV

At just 6 light years away, Barnard b is also one of the few known exoplanets with a mass less than that of Earth.

Illustration: ESO/M. Kornmesser

[Joseph Conlon @JosephPConlon]

One hundred years ago right now, exactly one person understood that the Sun was overwhelmingly made up of Hydrogen and Helium. 1/16

[Neil Kaye @neilrkaye]

It's the equinox on Sunday, here is an animation showing the path of the sun on the equinox and the solstices #dataviz

[Scott Duncan @ScottDuncanWX]

Flooding disaster unfolding right now in Central Europe.

Why is it so bad?

This thread takes a quick look at some of the key ingredients of this record-breaking storm.

[Linn Boldt-Christmas @nplinnspace]

@AstroEmz 🙋‍♀️ me!

10 yrs ago, I was a 2nd year physics undergrad & juuuust starting to think about the future… following the Rosetta landing live was one of my first “wow, *this* is what space is about”-experiences that *I* felt a part of. Huge reason for why I am where I am today! 🛰️❤️🥹

[Linn Boldt-Christmas @nplinnspace]

@bibianaprinoth @PlanetaryGao I have… a *conceptual* concept of a plan… that has a non-zero chance of being hypothetically possible to exist……. within 1 standard deviation………….

…Fund me? 🥺

[Linn Boldt-Christmas @nplinnspace]

@catherineregan0 @WestVirginiaU @PhysicsAndAstro Amazing news Catherine!! They’re lucky to have you 🤩❤️ big congrats to you and best of luck on your transatlantic adventure!

[Linn Boldt-Christmas @nplinnspace]

@aprea @ESA_transport Haha oh man! Yes, I remember this so well!! 2018, maybe…? I probably still have the old spreadsheet I used to work out the comparisons somewhere 🧑‍🏫

[Matthias Steinmetz @GalacticRAVE]

The @ESO ELT - wow!

[ARCHIVED - Curiosity Rover @MarsCuriosity]

*Cronch* I ran over a rock and found crystals inside!

It's pure sulfur. (And no, it doesn’t smell.) Elemental sulfur is something we’ve never seen before on Mars. We don't know much about these yellow crystals yet, but my team is excited to investigate. https://t.co/Am07DuXpPX

[Jayne Birkby @jaynebirkby]

ANDES is a go! 🥳 An epic high res spectrograph for @ESO's ELT with so much exoplanet science to do that we wrote 100+ pages about it, you can read all about it here: https://t.co/G20KYCZ2qm from exoplanet weather to biosignature surveys of nearby rocky exoplanets 🌍🤩