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Sarah Hörst

@planetdr.bsky.social
27K followers 525 following 8.7K posts

Professor of planetary science at Johns Hopkins. Titan’s biggest fan. Pomeranian wrangler. Runner. Love many, trust few, always paddle your own canoe. She/her. sarahhorst.com Planetdr.26 on signal

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Sarah Hörst @planetdr.bsky.social · 29/09/2026
So the lander has a group chat? Do the instruments emoji react? #ThingsActualScientistsSay
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Anna Gifty @itsafronomics.blacksky.app · 28/09/2026
Let the history books show that STUDENT reporters brought national attention to unchecked abuse. I hope that their cups and opportunities forever overfloweth.This is courage.
abcnews.com
District attorney reopens case of alleged Cornell University 'gang rape'
Prosecutors in central New York say they are reopening the case of alleged gang rape at a Cornell University fraternity.
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Sarah Hörst @planetdr.bsky.social · 28/09/2026
All the replies to @tressiemcphd.bsky.social’s posts are wild to me. Like I can absolutely envision something like this existing. But the sheer amount of work required to make it better/easier/less time consuming is absolutely not even remotely worth it to me (ignoring environment, ethics, etc)
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Sarah Hörst @planetdr.bsky.social · 27/09/2026
A thinking that I find…something is I have yet to be surprised about who is all in on GenAI and who isn’t. Every time I’m like yup that tracks
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🌬Breeze @cool-summer-breeze.bsky.social · 24/09/2026
This is the Stolen Neighbors Quilt. Each of the 11,000 squares represents a person taken by ICE in Minnesota.
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David_j_roth @davidjroth.bsky.social · 24/09/2026
I'm under no illusions about how things are or what the trajectory is. But I'm also excited for the future because that is where I will hang out with the people I care about and do the things I like doing, or haven't done before. Weird but telling that this holds less appeal for much richer people.
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David_j_roth @davidjroth.bsky.social · 24/09/2026
The sunny side of this delusion is the computer gives you a flying car and makes it so you don't have to work. The blackpill one is that it wipes us out via some cinematic method TBD. Two futures you don't actually have to live in. Both are abdications, and embarrassingly childish on their face.
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David_j_roth @davidjroth.bsky.social · 24/09/2026
It's too depressing and obnoxious to write about, but virtually all of the doomy/horny AI hyperventilating is transparently displaced anxiety about our fucked climate and political situation. Even rich idiots know it's bad and being permitted to get worse. They're trying to write their own ending.
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Sarah Hörst @planetdr.bsky.social · 23/09/2026
Ok unrelated to my car. A thing I’m *still* not used to about Maryland that feels like magic is multiple growing seasons. I mostly gardened in Montana which, well it snowed one 4th of July as a child so. I planted these a few weeks ago. Fall garden what
Four different kinds of lettuce in a raised bed Snap peas and a caterpillar
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ashley fairbanks @ziibiing.com · 23/09/2026
he is! www.etsy.com/listing/4330...
etsy.com
Walnut Stained Antler Earrings - Etsy
This Wedding Earrings item by EshkanHouse has 4 favorites from Etsy shoppers. Ships from Minneapolis, MN. Listed on Jul 7, 2026
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Sarah Hörst @planetdr.bsky.social · 23/09/2026
Does Bluesky have car nerds? I need help. I got my oil changed and new brake pads installed today. The whole thing was a CF, which is why I’m asking you not them. When I got home I discovered a piece of black plastic in my cup holder. Google lens swears it’s a piece of my car. Im less convinced
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Sarah Hörst @planetdr.bsky.social · 22/09/2026
Here! docs.google.com/spreadsheets...
docs.google.com
Planetary Science MS/PhD Positions Starting Fall 2027
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Ambassador Ken Fairfax (ret) @portlandken.bsky.social · 19/09/2026
The accounting is in: In Oregon there are 111 data centers. The TOTAL number of people employed at data centers is just 2,630, or 0.1% of the labor force. Those 100 data centers consumer 23% of all electricity used in Oregon. Meanwhile, electricity rates skyrocket as more centers are built.
opb.org
Oregon data centers by the numbers: 111 facilities consume nearly one-quarter of state’s power, according to new report
A first-of-its-kind report details the footprint of the controversial facilities.
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ActivistChecklist.org @activistchecklist.org · 19/09/2026
Read this before upgrading to iOS 27 if you have an iPhone 15 or newer that supports "Apple Intelligence." New AI features might send your data (like Signal messages) off your device to Apple's servers It's absurd that we have to work so hard for our privacy :(
eff.org
How to Limit What Apple’s New Siri AI Can Access in iOS 27
Apple’s new operating system is here, and along with it comes a new version of Siri, dubbed with two very familiar letters: AI. As the name suggests, this Siri power-up resembles an AI chatbot more th...
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Sarah Tuttle @niais.cryptoanarchy.network · 19/09/2026
What's the rule? DO NOT. PICK UP. OR TOUCH. THE BATS.
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Jonathan Fortney @jjfplanet.bsky.social · 18/09/2026
*8* postdoctoral positions in atmospheric physics, from the Earth to Exoplanets: aas.org/jobregister/... This is part of the Multiscale Physics of Clouds Across Planetary Atmospheres collaboration, funded by the Simons Foundation, led by Prof. @astrocaroline.bsky.social!
aas.org
Postdoctoral Researchers — Multiscale Physics of Clouds Across Planetary Atmospheres | American Astronomical Society
The Multiscale Physics of Clouds Across Planetary Atmospheres collaboration, funded by the Simons Foundation, is seeking 8 postdoctoral researchers to develop new approaches to understanding clouds ac...
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Sarah Hörst @planetdr.bsky.social · 19/09/2026
I’m watching Mystery, Alaska and having Thoughts about AI. Time to put down the internet for a while.
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Steve Kovach @stevekovach.bsky.social · 19/09/2026
what are we doing
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Sarah Hörst @planetdr.bsky.social · 18/09/2026
I took my class on a “field trip” across campus to see a colleagues lab today. Whooo boy I need to do a better job of using the absurdly amazing resources on my own campus. I’m sorry you are doing what in the basement of Malone
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Full Story Baltimore @fullstorybaltimore.tours · 18/09/2026
This Saturday! A rare day game, er, tour! Join us in the morning and then head to the Trey Mancini O's game or the Baltimore Book Festival! Lots and lots going on in town 🧡
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Sarah Hörst @planetdr.bsky.social · 17/09/2026
There is a class I team teach every semester. There are three instructors. 20 students. And somehow every semester they don’t notice that we are strategically spaced throughout the room. I sit in the back row. So today I got to stand up and remind them I can see their laptop screens…
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Asheesh Kapur Siddique @asheeshks.org · 16/09/2026
More than any higher ed development in recent memory, institutional subsidies for AI at R1 universities prove that austerity is a choice. It is not “too expensive” to invest in a humanities research infrastructure; rather, it is a choice that R1 universities make not to & subsidize AI instead.
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Riding With Robots @ridingrobots.bsky.social · 15/09/2026
Nice photo but pretty easy to scroll past until you realize it was taken on Mars.
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Dr. Lucky Tran @luckytran.com · 15/09/2026
It's official: The EPA has repealed a rule that would have directly saved thousands of lives by limiting fossil fuel emissions from power plants. Industry lobbyists successfully pushed for this repeal using surging demand from data centers as justification. The government chose AI over human lives.
EPA Finalizes Repeal of 2024 Power Plant Regulations, Delivering $300+ Billion in Savings, Proposes Repeal of All Remaining Greenhouse Gas Emissions Standards for Power Plants

Trump EPA delivers reliable and affordable energy in the largest power sector deregulatory action in U.S. history

September 14, 2026
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Dave Zirin @edgeofsports.bsky.social · 14/09/2026
Turns out the person who demanded that Macklemore be removed was Patriots owner Bob Kraft under threat that he would cancel their tour stop at the Patriots stadium. Oligarchal pressure stomping the first amendment. Also Ed Sheeran is a fucking coward. Writing about all this now.
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Tressie McMillan Cottom @tressiemcphd.bsky.social · 14/09/2026
I have a cousin who was constantly putting me on game with ways that I could get out of my J-O-B and not do all that “smart shit cuz.” I finally explained to them that I LIKE all the smart shit, did in fact choose to do it for a living, and I am very good at it. They never really believed me.
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Simeon Schmauß @stim3on.bsky.social · 13/09/2026
Here is a fun little animation showing how the shadows on Phobos change over the course of its short (7h 39m) day. The other image was actually taken two weeks ago, but since Phobos is tidally locked to Mars, it doesn't really matter. 🔭🧪
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András Gáspár @andrasgaspar.bsky.social · 13/09/2026
Holy cow! Most international graduate students on F1 visas remain here for a few years on OPT to finish their work after graduating and end up staying in the US. This means students will just go back home. What a way to waste the ~ $1M investment that is the education of every PhD student.
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Sarah Hörst @planetdr.bsky.social · 11/09/2026
We thought we finally sorted this out in June. But then it never showed up. So we sent an inquiry…
My apologies, apparently this order was never entered into our production queue.
It was never built, shipped, or billed.
If you like, we can rush the production and ship it next week.
Alternately, you may cancel the order without obligation.
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Imani Gandy @angryblacklady.blacksky.app · 11/09/2026
In 2016 people revolted against North Carolina bathroom bill. 10 years later and the country is up in arms over 15 athletes and there are Democrats who are insisting that this is a real concern. It is not. I won't pretend that it is. I won't say nice things about people who are pretending that it is
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jamelle @jamellebouie.net · 11/09/2026
i think it is bad that the president is that helm of a deranged cult of personality
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Union of Concerned Scientists @ucs.org · 10/09/2026
“Losing NCAR would set back scientific research, with real consequences for people’s lives and livelihoods. As a taxpayer-funded public good, NCAR belongs to all of us, and we deserve to know the rationale and deliberations behind any effort to dismantle or restructure it.”—Carlos Martinez, PhD.
ucs.org
National Science Foundation and White House Sued for Refusing to Release Government Records
UCS, represented by Earthjustice, and Environmental Defense Fund filed a lawsuit against the National Science Foundation and the White House for withholding information about plans to dismantle the National Center for Atmospheric Research.
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Sarah Hörst @planetdr.bsky.social · 10/09/2026
Every afternoon/early evening Dragobfly’s Integration and Testing lead emails the team an extremely brief update of the day and the next few days. It’s been a hard I don’t even know how long so I recognize my bar is in hell but it’s often my favorite part of the day.
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Sarah Tuttle @niais.cryptoanarchy.network · 10/09/2026
As a parent of a trans kiddo - medical care for trans care is clear, has medical recommendations, and does not need you sticking your nose into the business. The only debate is an existential one. Either you support trans people, or you think they don't deserve to exist. Everything else is noise.
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Sarah Hörst @planetdr.bsky.social · 09/09/2026
I would pay an absurd amount of money for a gym that bans cell phone use on equipment
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Jarret @adarkenedshroud.bsky.social · 09/09/2026
Next, machines built by people who solve problems by killing others will begin doing so sooner than later!
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Sarah Hörst @planetdr.bsky.social · 09/09/2026
In breaking news, machine built by stealing people’s work, steals people’s work.
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David Grimm @david-grimm.bsky.social · 09/09/2026
If the announcement is confirmed, it would mark the first time AI has solved a truly major open problem in math. But a fierce dispute has erupted over who deserves credit. Dive into all of the thorny details in this great story by Celina Zhao and Adrian Cho for @science.org
science.org
How an AI math breakthrough ignited a controversy
OpenAI spent millions to solve Navier-Stokes problem, but who should get credit?
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Allison Gill @muellershewrote.com · 09/09/2026
Vote early. Election Day is the end of the election, not the beginning. With everything this regime is going to do to suppress our votes, it’s imperative that we leave plenty of time to correct any issues.
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ddouglas 💎 🇺🇦 🦋 @dd9000.bsky.social · 08/09/2026
Hank gives another, several, shoutouts to @planetdr.bsky.social youtu.be/MYa4vLcpBqg?...
youtu.be
Answering your Dumb Saturn Questions
YouTube video by Hank Green
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Dr. Lucky Tran @luckytran.com · 08/09/2026
Zohran Mamdani released 170K documents revealing that post-9/11 asbestos levels remained dangerous for months, despite officials saying the air was safe. As we saw at the start of COVID, officials still treat essential workers as expendable. This is a long-overdue step in the right direction.
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Lisa Snowden @lisasnowden.bsky.social · 07/09/2026
The thing about the banner that grinds my gears is that they were gift wrapped all this money consistently choose the least interesting or innovative ways to spend it.
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derek guy @dieworkwear.bsky.social · 06/09/2026
this is the kind of design costume designers make to tell you who are the bad guys in a space movie
Donald Trump posts an image on his Truth Social account. It shows a new uniform for US Space Force members, comprising of an all-black outfit with knee-high black leather boots, black cap, and minimalist looking suit.
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Jack Stack @jackstack.bsky.social · 06/09/2026
Couldn’t agree more. The skill that will last any student the longest is being able to solve problems and adapt to new information. We must also remember that billion dollar industries exist to prey on people without critical thinking skills.
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Timnit Gebru @timnitgebru.blacksky.app · 06/09/2026
"So in summary: using AI for coding led to depression, apathy, existential dread, and worse software. Not good. Add on top of that the negative environmental, community, and economic impacts of AI, and it became extremely apparent to me that something's gotta change." brettcodes.com/im-done-usin...
brettcodes.com
I'm done using AI
Why I'm stopping using AI for coding (and anything else) after using it earnestly for a year and coming to understand the harms it causes on personal, societal, and environmental levels.
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Sarah Hörst @planetdr.bsky.social · 06/09/2026
Two Saturdays in a row 🤔 If I didn’t know better…
Temp in my office on Aug 29 going from 70 to 80 in a few hours and then back down. With the annotation that I emailed families at around 10/20 AaamScreenshot of temp going from..70 to 83 in a few hours with annotations of emails to facilities at 10 and 1:30
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Sarah Hörst @planetdr.bsky.social · 05/09/2026
Got my Covid vaccine. Still Team Moderna!
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Sarah Hörst @planetdr.bsky.social · 05/09/2026
At least in our own galaxy- there are more planets than stars. If you look at a star at night more than likely it has planets orbiting it.
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Sarah Hörst @planetdr.bsky.social · 04/09/2026
I was lazy so we are doing this again. Stay tuned.
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Sarah Hörst @planetdr.bsky.social · 04/09/2026
There’s a group of older folks that stand on a kinda random suburban street corner near my house every Friday morning wearing white and carrying signs about saving democracy and protecting the vote and I love them so much.
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