Professor of astronomy, farmer of goats. Asteroid (42910). She/her. Living and learning on the land and under the skies of Treaty 4 (Saskatchewan, Canada). Thanks to Saskatchewan's beautiful night sky, my research background in small body orbital dynamics, and a couple of really unfortunately placed SpaceX reentries, I spend a lot of time yelling about satellite pollution in international news media.
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2026-08-17T04:58:35Z Event JSON
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Last Notes npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Currently watching an IAU-CPS talk given by Olivier Hainaut. His simulations show that 30,000 sats at 350-600km causes the same astronomy research data loss as 6,000 sats at 1200 km. This is because higher altitudes are visible for a larger fraction of the night, and the sats move more slowly across the image so they cause brighter streaks even though they are farther away npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Wow. "AI adoption raises homework scores by 18% and reduces completion time by 30%, but lowers monthly exam scores by 20% within six months. High-stakes entrance-exam scores fall by 18 and 24%, with the full penalty emerging only after about two years. " https://mastodon.social/@gvwilson/117123155597432737 #nevent1q…mpj7 npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Good morning from my cute animals. The mama goats wanted to immediately head down to the eating pen after morning milking, but were caught by their giant-and-still-nursing babies, so they patiently chewed their cud and let their giant babies nurse. Looks hilarious! Devil Cat (actually a very nice barn cat) is very hard to photograph because she doesn't stay still for more than a split second. https://files.mastodon.social/media_attachments/files/117/088/627/772/998/551/original/3aebb8bb59cdd641.png https://files.mastodon.social/media_attachments/files/117/088/628/467/709/239/original/1f6542def3cdb340.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Most city dwellers don't know how much of the night sky has already been stolen by billionaires, because poorly planned, wasteful city lights have already drowned out the stars for them. #nevent1q…y8js npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Sending peace https://files.mastodon.social/media_attachments/files/117/063/355/789/141/093/original/bc4b4c7a714ed0be.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler There's a new crater on the moon due to SpaceX accidentally crashing a leftover junked rocket body yesterday. Give me your best name suggestions! (Please note that *I* have absolutely no control over naming craters on the moon, there's an IAU committee for that, this post is a joke. I will appreciate and boost my favourites.) https://www.cbc.ca/news/science/spacex-moon-crash-scar-9.7298047 npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler The book contract I signed a few days ago has a "no genAI" clause. Neither I, the author, nor the editor/publisher are allowed to use genAI. I am extremely happy about having that written officially in the document! #nevent1q…95a5 npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Dang, I haven't had to run a simulation overnight for a while. Thanks for being fucking terrible and asking for a million satellites, SpaceX. You suck. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Goodnight. (And by that I mean, I will make some more stupid plots of stupid techbro megaconstellations and then see those stupid plots when I close my eyes to go to bed.) https://files.mastodon.social/media_attachments/files/117/012/347/394/775/249/original/4e761439a8d9dd4c.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Well, there's a public website here where you can register to attend Reflect Orbital's ribbon cutting ceremony: https://luma.com/h6fva5ve It's in like an hour. Is there anybody in LA interested in politely expressing their opinions about orbital mirrors to the people building them? npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Goat morning https://files.mastodon.social/media_attachments/files/116/987/077/616/789/873/original/cae8cd8ae204254d.png https://files.mastodon.social/media_attachments/files/116/987/078/433/724/996/original/70283cc8d2e40f2d.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Ok this is HILARIOUS: DarkSky International made April Fool's Day "nighttime sunscreen" (supposed to protect you from reflected sunlight from satellites...) https://darksky.org/news/darksky-international-announces-first-sunscreen-designed-for-the-night/ Even funnier, I heard a rumour in a meeting today that they actually mailed some of this to the CEO of Reflect Orbital and their main investors, along with copies of their petition with thousands of signatures from people who don't want Reflect Orbital to kill nighttime for profit. Kudos, DarkSky! npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Hahaha apparently The Conversation sends you a congratulatory email when you have the most reads of the week now. Excellent. Now if only Reflect Orbital's investors and insurers would read it and STOP GIVING THEM MONEY https://theconversation.com/the-u-s-just-approved-a-giant-space-mirror-to-test-sunlight-on-demand-low-earth-orbit-is-getting-weird-283482 npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I used to be excited about rocket launches. Fuck you, SpaceX, for taking that away from me by destroying the sky, the atmosphere, and dropping shit on me because of your terrible safety and nonexistent environmental practices. #nevent1q…zhlt npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Auuuggghhhh I have to update the megaconstellation numbers (mostly Starlink) for a talk tomorrow. I hate this. There are 10,799 Starlink satellites in orbit, out of 12,556 total launched, and 42,000 (+100,000 more) planned (+1,000,000 "data centres" planned) There are 394 Amazon Kuiper sats in orbit out of 7,000 planned There are 211 Xingwang out of 960 planned There are 239 Quianfan out of 16,000 planned All numbers from https://planet4589.org/space/con/conlist.html npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler On a more serious note, does anyone know how to find out who is insuring Reflect Orbital? Seems like they might want to know the company they're insuring admitted in an official FCC document that they could cause permanent eye damage to people who look at their satellite through a telescope... npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler On first glance (pre-caffeine) it looks like there are a bunch of mansplainers doing math to defend Reflect Orbital in my mentions. FANTASTIC. Good morning to everyone except the people defending or funding Reflect Orbital. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler GREAT guess I'm not going to sleep tonight either. Maybe there will be auroras. I need to enjoy the night sky as much as I can now, I guess. Fuck you, FCC, for approving this. Fuck Reflect Orbital and all the copycats it's going to spawn. Fuck techbros everywhere. Fuck venture capitalists for funding this destructive, useless bullshit. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Want some reminders of how fucking terrible this idea is? https://bigthink.com/starts-with-a-bang/true-cost-solar-power-night-reflect-orbital/ https://theconversation.com/a-us-startup-plans-to-deliver-sunlight-on-demand-after-dark-can-it-work-and-would-we-want-it-to-264323 https://darksky.org/news/organizational-statement-reflect-orbital/ Journalists: please write about how dangerous this is. Lawyers (especially if you're based in the US): please help fight this, it will take legal action now npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler FUCK FUCK FUCK FUCK NOOOOO https://ca.pcmag.com/news/16760/fcc-approves-reflect-orbitals-giant-mirror-satellite-that-astronomers-hate npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler HAHAHA FUCK SpaceX just launched a nuclear powered satellite. https://www.space.com/space-exploration/launches-spacecraft/spacex-just-launched-the-1st-ever-nuclear-powered-commercial-satellite Sounds like this particular satellite is tiny and doesn't have a lot of tritium on board but HOLY SHIT this is a bad precedent. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Grateful to be back home, in the land of rectilinear geometry. My humans have been hugged, my cats have been snuggled, now waiting for the rain to stop so I can go snuggle the goats and dogs. https://files.mastodon.social/media_attachments/files/116/739/574/463/781/887/original/543aed85f100e639.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Ok train nerds: why does the green line on the Montreal subway use tires instead of metal wheels and tracks??? (Also daaaaang the Montreal green line is NICE) https://files.mastodon.social/media_attachments/files/116/717/598/555/180/870/original/653c7a43ae6668f7.png https://files.mastodon.social/media_attachments/files/116/717/603/676/011/019/original/57e2117594855a97.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler We said goodbye to our llama. We only had him for about 3 years, but he was such a lovely, chill addition to our farm. I will miss him deeply. https://files.mastodon.social/media_attachments/files/116/704/809/675/553/597/original/594e11839469a3c1.jpg npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I really need to do a thread tearing apart all the complete bullshit in SpaceX's latest modification to their million satellite "AI data center" filing (thanks @nprofile…xl49 for finding a public link to that: https://www.scribd.com/document/1045612919/SpaceX-Response-05-29-2026) But I don't have time or emotional energy for it right now. I promise, it's very bad. And all the (what I thought were) worst-case assumptions on size and mass were actually underestimates. SpaceX's plan would have so many horrible consequences for everyone. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I finally started reading The AI Con by @nprofile…5876 and @nprofile…8f3n and I already laughed out loud in the first few pages. "Racist pile of linear algebra" is my new favourite term for genAI. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler YOU GUYS!! We live on a planet where the perfect combination of chemistry, atmospheric temperature and pressure, and geometry means that this ridiculously beautiful thing just HAPPENS sometimes!!! Earth is so damn neat! We have the best planet! https://files.mastodon.social/media_attachments/files/116/615/988/935/746/236/original/0d7d143ed26033c2.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I just wrote this sentence in a document where I needed to establish credibility, and I keep giggling about it "I am an astronomy professor, and thanks to Saskatchewan's beautifully dark skies and a couple of very unfortunately placed SpaceX reentries, I am now an internationally recognized expert on space debris and pollution from satellites." npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Don't worry, Sam, SpaceX won't ACTUALLY launch 7,000 satellites! (There are currently 10,296 Starlink sats in orbit) Don't worry, SpaceX said they'd get their satellites below magnitude 7! (They have not https://ui.adsabs.harvard.edu/link_gateway/2025MNRAS.544L..15M/PUB_PDF) Don't worry, they won't actually start Kessler Syndrome! https://outerspaceinstitute.ca/crashclock/ Don't worry, they won't actually launch a million AI data centres into orbit!! https://theconversation.com/a-new-space-race-could-turn-our-atmosphere-into-a-crematorium-for-satellites-276366 This is the fucking worst I-told-you-so https://apod.nasa.gov/apod/astropix.html https://files.mastodon.social/media_attachments/files/116/476/998/997/111/874/original/1ec846317c89888d.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I won an astronomy communication and public education award from the Canadian Astronomical Society, for yelling about satellite pollution! I'm quite honoured, and now obligated to continue yelling. Which I was going to do anyway, but it's extremely nice to know that my university (who gave me a public education award last year) and my professional society both think I am good at yelling about this and should keep doing it. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Upside to 2am barn checks for the #BabyGoatCountdown: there were full-sky auroras! (It *finally* wasn't cloudy, yay) https://files.mastodon.social/media_attachments/files/116/426/128/476/356/030/original/8c8c3a4541367bf0.jpeg https://files.mastodon.social/media_attachments/files/116/426/129/663/178/383/original/360e6066cb5c4a1f.jpeg https://files.mastodon.social/media_attachments/files/116/426/131/418/645/961/original/529b9f17e918dde0.jpeg npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Good morning! It's very cold and sparkly. And there are no new baby goats. But the 5 baby goats so far are SO CUTE and very healthy. #BabyGoatCountdown https://files.mastodon.social/media_attachments/files/116/426/109/890/888/018/original/58bcf71d058998ee.png https://files.mastodon.social/media_attachments/files/116/426/110/400/256/966/original/e191e473ab79fcea.png https://files.mastodon.social/media_attachments/files/116/426/110/988/380/137/original/339a8c244b0a2027.png https://files.mastodon.social/media_attachments/files/116/426/112/395/392/063/original/d3d71c7bd6463902.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I am... really tempted to pin this to the top of my account... Print it and put it on my office door... send it as my email signature... wear it around my neck at conferences.... https://www.bbc.com/worklife/article/20180727-mansplaining-explained-in-one-chart https://files.mastodon.social/media_attachments/files/116/415/404/775/190/524/original/3eb2d5dbe4a2e8a2.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Trying to edit a stupid FCC comment on Yet Another Fucking Stupid Orbital Data Center (fuck you, Blue Origin) and I need to go outside and rage-scream for a while. And I have an easily accessible hayfield to rage-scream in!! (Also maybe baby goats, I'll check for those too #BabyGoatCountdown) npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I very much appreciate the way they wrote this: "SpaceX, which recently reported two Starlink satellite failures that created new space debris, yesterday accused Amazon and its launch partner Arianespace of negligence that 'needlessly and significantly increases risk to other operational systems and inhabited spacecraft.'” It's too bad that 2 giant evil companies hating each other does not result in anything cancelling out, and will probably just cause more problems... #nevent1q…rgk6 npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler *Secret hilarious project* is now live! Astronomy has a fine tradition of April Fool's Day papers, where there are real calculations, but perhaps on a very silly topic. Compilation of this year's Acta Prima Aprilia papers here: https://www.actaprimaaprilia.com/2026-issue npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler FCC reply comments are due by 5pm Monday 30 March on Reflect Orbital. If you wrote in a comment, please please please write in again saying that they did not address your concerns in their letter (which is very hard to find in the FCC dumpster-fire-of-a-website). Instructions here: https://aas.org/posts/advocacy/2026/02/how-submit-comments-satellite-applications-fcc The most horrifying part in their "consolidated reply": they agree that they could in fact cause permanent eye damage to people using medium-sized telescopes. WILD. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler For no reason at all, please give me your favourite cow-related figures of speech! (Stuff like "No use crying over spilled milk" or "until the cows come home", puns extremely welcome) npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Yesterday my partner and kids visited the Antarctic Centre in Christchurch, and they were all delighted by the penguins and huskies. They were less impressed by the "cold room" (which was -8C and had fans that also blow wind at 40km/hr, they have parkas you can borrow...) Saskatchewan has completely changed our standards for cold weather! My 9yo: "It didn't even freeze my boogers! That's not cold!" My partner: "It was nice dog walking weather." npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Fuck. Reflect Orbital apparently had more time than we thought to respond, and they just did. We have a lot more writing to do. Hopefully some of you who wrote comments will also write and submit replies to Reflect Orbital's FCC response. I'm sure it's total bullshit, and I am not sure when I will have the strength to read it. Fuck you, Reflect Orbital. I hate absolutely everything you are planning to do. Really tempted to submit THAT to the FCC...but I will rethink when not 100% exhausted. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler The third article in this (horrible) series of articles I've co-authored is now out. https://theconversation.com/a-million-new-spacex-satellites-will-destroy-the-night-sky-for-everyone-on-earth-277938 A million satellites of the size required for "AI data centers" would mean that everyone in the world would have more visible satellites than stars for most of the night and most of the year. But don't worry, we'll be in Kessler Syndrome WAY before we get to a million satellites! npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I presented at the local planetary journal club this morning about the 3 articles I co-authored for The Conversation in the past weeks about the effects that one million satellites would have on the night sky, the atmosphere, and the orbital environment (spoiler alert: all very very bad) https://theconversation.com/a-new-space-race-could-turn-our-atmosphere-into-a-crematorium-for-satellites-276366 https://theconversation.com/too-many-satellites-earths-orbit-is-on-track-for-a-catastrophe-but-we-can-stop-it-275430 And one on light pollution that I thought would get published today but might not be out until after the weekend. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Well, I have now been quoted calling SpaceX "fuckweasels" in a real publication by real journalists: https://au.pcmag.com/ai/116598/spacex-to-start-small-with-1-million-satellite-plan-pushes-back-on-critics I guess I am proud of myself? (They are, indeed, fuckweasels, for their complete lack of care for the atmosphere that we all depend on, as well as not caring about Kessler Syndrome, or light pollution, or smashing people on the ground...) npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler You know what's really cool? Sociable eels in small streams on a university campus in New Zealand. https://files.mastodon.social/media_attachments/files/116/192/515/565/612/037/original/481a33faa3081c9e.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Deadlines for comments on a million SpaceX "AI data centers" and a company that wants to deliver "sunlight as a service" are coming up soon. If you have time and energy, please write a comment! Instructions below. (I heard a rumour that Reflect Orbital is on-track to have the most comments on an FCC filing ever. Seems like a good goal to beat the record writing responses to this incredibly fucking stupid idea) Also instructions here: https://darksky.org/news/two-satellite-proposals-threaten-the-night-sky-the-window-to-act-is-now/ #nevent1q…qurn npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler The next few days are going to be extremely hard for personal reasons (on top of everything else happening). I'm sending good commiserating vibes out to everyone else who's using all your coping strategies and still feeling like you're drowning in all the shit that's happening. I hope you get a few moments of peace today that help you power through all the shit you have to get through. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I love love love love (in a sarcastic, dark humour sort of way) the title of the article Dr. Laura Revell, Dr. @nprofile…k5hz and I wrote last week https://theconversation.com/a-new-space-race-could-turn-our-atmosphere-into-a-crematorium-for-satellites-276366. But one thing got cut in the final edit: simulations of the night sky with 1 million satellites. I just tried to pitch a separate article on that, I'll see if that gets picked up this coming week or not. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Ok, now that you've sat through that rant, my family and I saw SEVEN KIWIS yesterday! 3 were on Ulva Island, and 4 were just snarfling around in the grass on the sides of the roads around Oban, the only town on Stewart Island. The giant New Zealand pigeons, Kurerū, were abundant and delightful. We saw kākā parrots in town and in the woods, too! Nearly 40 people came to my talk! Which is extra incredible because there are only 300 people living on the island. https://files.mastodon.social/media_attachments/files/116/146/025/787/124/463/original/e58166055af41085.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Kia Ora, Invercargilll! I still owe the world a few posts about my time on Stewart Island Rakiura because that was completely incredibly amazing. But the only internet access I had was through the public library, which has a Starlink antenna on top, which made me feel pretty gross. Say it with me again, everyone: rural and remote places need internet access that is not controlled by and enriching an American billionaire!! #ProfSamLectureTour npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler New article out about what a million satellites could do to our atmosphere. It's bad. https://theconversation.com/a-new-space-race-could-turn-our-atmosphere-into-a-crematorium-for-satellites-276366 npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I got to borrow a bike today and I biked waaayyy longer than I meant to because Christchurch's biking infrastructure is AWESOME, it's super flat and easy to bike here, and I am still constantly guessing directions wrong because I'm in the opposite hemisphere I'm used to (took the "scenic route") Extra bonus points to me for not making any dumb mistakes while biking on the opposite side of the road from what I'm used to, while in traffic, in a city! npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler @nprofile…medq So in Canada, SpaceX gave $5000 to each family that found space debris on their property. Something tells me they won't do this in Madagascar 😠 npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Too wound up to go to bed, so I just sent lots of emails to people hoping that they'll spread the word and get lots more people to write comments to the FCC telling them that orbital data centres and sunlight-as-a-service are incredibly stupid, dangerous ideas and should never be launched. Instructions here to submit here: https://darksky.org/news/two-satellite-proposals-threaten-the-night-sky-the-window-to-act-is-now/ I don't think it'll actually make a big difference. But I do think it's incredibly important that the official record shows how many opposed this. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Just another shout of appreciation for public libraries! Wellington has at least one good one (I strongly suspect more than one but I'm not going to be here for long enough to double check that). Lovely place to sit and catch up on everything before heading to the south island in a few hours. The vast majority of the rest of the #ProfSamLectureTour will be from Christchurch and I'm really looking forward to staying in one city for more than a day or two! npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Reflect Orbital wants to destroy the night sky to deliver "sunlight as a service". SpaceX wants to destroy Low Earth Orbit to launch one million "AI datacentres" The only way to formally protest these two ideas is to file a comment with the US FCC, which is horribly complicated, but the American Astronomical Society has detailed instructions posted here: https://aas.org/posts/advocacy/2026/02/how-submit-comments-satellite-applications-fcc Comments due March 6 for SpaceX and March 9 for Reflect Orbital. Write! Write! Write! npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Observations from a Canadian visiting New Zealand: -Making NZers say "Saskatchewan" is kind of hilarious -Roundabouts work really really well when everyone is used to them -Drip coffee apparently does not exist here (espresso-based coffee drinks only. Even at the one Dunkin Donuts I saw in a hideous mall I had to go inside in Auckland). -NZ signs do not play around (see example below) https://files.mastodon.social/media_attachments/files/116/027/637/922/225/756/original/c1f2da23c8ec47c2.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Hello Aotearoa New Zealand!! (I am so tired and need to stay awake longer) #ProfSamLectureTour https://files.mastodon.social/media_attachments/files/115/987/482/408/744/422/original/88e44ae901900d52.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler The friends I'm staying with have a hilariously sad, ancient folding bike they found with a "free" sign years ago. I really desperately wanted a bike ride, so I pumped up the tires and explored a bit on the greenways of Surrey. The front brake, which had been doing most of the heavy lifting, gave up the ghost as I approached a busy street, so I carefully turned around and very very slowly biked back on sidewalks and through alleys. Very pleasant, though! https://files.mastodon.social/media_attachments/files/115/969/807/086/135/028/original/451c63153bcc02bb.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I started writing this book project using zettlr in markdown, because that seemed like the best way to incorporate many citations from a wild variety of journals/books/articles. But I am now having serious problems trying to integrate files. Latex is hard but I know it quite well, I just don't have a latex editor that I like that's reliable (I'm not doing this on overleaf, it's just me, no sharing needed). Recs? Advice? I'm running Ubuntu. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Time to watch @nprofile…awgk give a talk at UBC in the forestry department! Because I'm just leaning in to the theme of interdisciplinarity as much as I possibly can to end this week. #ProfSamLectureTour npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler *pops up for air briefly between amazing beaches and forests and research discussions and constant yelling about satellites and hanging out with friends* Sending peace! (Wish me luck on an extremely long first Skytrain/bus commute I've done in over a decade tomorrow morning!) #ProfSamLectureTour https://files.mastodon.social/media_attachments/files/115/880/305/306/170/874/original/8547f210a687e5c3.png https://files.mastodon.social/media_attachments/files/115/880/307/436/896/306/original/be3c25c1801d9cf6.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Super busy today, but just have to quickly share that this morning, I woke up at a friend's house, under a skylight, and was delighted to see stars above me for nearly the first time this whole BC trip (lots of clouds here)! And literally 10 seconds later, I saw a fucking Starlink train! Through the skylight!!! AUGH. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I really really hate QR codes. But a lot of people really like them. And they're useful during a talk for the people who really like them (I'm also including the text of the link, though, dammit!) But... I have never done this before, and a lot of the "free QR code generators" look kind of scammy and I don't want to give people weird viruses or spam. So... fediverse, help! EDIT TO ADD SOLUTION: within like 2 minutes https://zxing.appspot.com/generator I love you, fediverse. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I am up at the observatory in Victoria today (and for the whole week)! It is really fun to see a whole bunch of people I used to work with when I was a postdoc here, and be in a building that is completely full of astronomers!! Quite a change from Saskatchewan where I am the only professional research astronomer in the entire province... (Also it's sunny again and I want to go hike. But I will get some writing and emailing and talk-organizing done first...) #ProfSamLectureTour https://files.mastodon.social/media_attachments/files/115/844/510/990/624/371/original/213f9e395c9de016.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Sorry that was depressing and everything is already terrible. I would normally post a photo of my goats, but they are far far away right now. So, here are some very happy goats in Victoria we found yesterday, happily eating Christmas trees. https://files.mastodon.social/media_attachments/files/115/840/342/354/398/000/original/9dfdb798ed8fe049.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Other megaconstellations are starting to catch up a bit now. Which is why the CRASH Clock (our team's measure of how long it would take for a collision if all satellite maneuvers suddenly stopped) is so ridiculously short: 5 days in our updated calculation OneWeb has 654 up out of 7,000 planned Kuiper has 180 out of 3,000 planned Xingwang has 160 out of 1,000 planned Satellite numbers from https://planet4589.org/space/con/conlist.html npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler @nprofile…jks6 It does lower the risk of Kessler Syndrome. But it means that reentries will happen more frequently because satellites will require more fuel to stay in orbit and will likely have shorter operating lifetimes. So more pollution from reentries and launches, more ground casualty risks. Also satellites will be significantly brighter because they're lower. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I have never seen the word "perihelion" in a weather warning before! Wow. I'm totally saving this to show my students why basic astro 101 is very practical sometimes (...ok maybe the prairies do not have a tidal flooding problem...but... perihelion!!) https://files.mastodon.social/media_attachments/files/115/828/064/584/996/549/original/d7a34fec5550c0c9.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Reposting for those not bridged to BlueSky, and to add alt-text, because this is important! Jonathan McDowell @nprofile…p855 posted this morning: "The number of active satellites in orbit has now passed the 14000 mark according to my estimates" https://files.mastodon.social/media_attachments/files/115/723/937/865/346/568/original/d829c164a156831e.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Check out my eyebrow-sicles! Follow me for more beauty tips! (Spent a bunch of time outside in -25C teaching the farm sitter how to run the tractor and move hay bales to keep the goats fed and happy while we are away) https://files.mastodon.social/media_attachments/files/115/714/813/961/611/471/original/ddc82358eff7679a.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Pretty! But really fucking cold. (Thermometer said -35C this morning) https://files.mastodon.social/media_attachments/files/115/712/785/732/527/950/original/b3dc9746ec56694f.png https://files.mastodon.social/media_attachments/files/115/712/786/460/671/038/original/993b568dfdac080e.png https://files.mastodon.social/media_attachments/files/115/712/787/319/559/399/original/9314b7ac40e79ac5.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler First below -40 windchill morning. Yuck. https://files.mastodon.social/media_attachments/files/115/706/867/048/046/699/original/6291fab2265a7d43.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Schoolbus just picked up my kid and it's almost completely dark still. I don't know how people handle wintertime even closer to the poles than this! npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I'll say it again: there is a hard limit to how many satellites you can have in orbit without terrible consequences, and I am quite sure we are already above that limit, mostly thanks to Starlink. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I talked to a Scientific American reporter about the paper yesterday - always interesting to see which 2 sentences a journalist picks from a 20 minute interview! paywalled: https://www.scientificamerican.com/article/satellite-megaconstellations-are-now-threatening-telescopes-in-space/ archive version: https://web.archive.org/web/20251203211914/https://www.scientificamerican.com/article/satellite-megaconstellations-are-now-threatening-telescopes-in-space/ npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler The accompanying News & Views piece "Even in space, satellites photobomb telescopes" by @nprofile…2mzp is excellent! https://rdcu.be/eSZJX Here's a lovely space-based telescope image, with 560,000 satellite friends. Thanks, techbros. https://files.mastodon.social/media_attachments/files/115/657/697/602/165/862/original/63e5a14d3ee3c2de.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Every astronomer who complains about satellite streaks has heard the same response from techbro-types: "Why don't you just put all your telescopes in space?" There are an incredibly large number of reasons why that is totally not going to work. But here's another from Borloff et al "Satellite megaconstellations will threaten space-based astronomy" https://www.nature.com/articles/s41586-025-09759-5 npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler "Even Carrington would be impressed" 😬 https://spaceweather.com/archive.php?view=1&day=02&month=12&year=2025 Hopefully we just get "someone should check on our satellites" levels of auroras and not "A bunch of open questions in solar-terrestrial physics are about to be answered" https://files.mastodon.social/media_attachments/files/115/651/655/395/936/784/original/1ea29914871e0fed.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler @nprofile…z64c @nprofile…weex Dude you're completely wrong about Starlink satellites being less bright now: https://arxiv.org/pdf/2507.00107 npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler As long as I'm screaming, I hate hate hate that lower altitude orbits has become a standard request from astronomers to satellite operators. Lower orbits make satellites blur out more for the specific setup of the Vera Rubin Observatory, I do not know if this is true for any other observatories in the world. Lower orbits make satellites brighter and faster, which is worse for naked-eye stargazers and astrophotographers, and presumably for wildlife though nobody I know has studied that yet. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Just need to scream a little bit about how there are actually hard limits to how much stuff we can have in orbit without severe consequences! It's ok to say that out loud, even if the techbros don't want to hear it! It's ok (and vitally important) to have in your list of recommendations for satellites operators "Don't launch so many satellites." This is really pretty key to not destroying the night sky, LEO, and/or the atmosphere. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I should add...other than obviously consolidate my lists into one list... Are there things that you wished you had brought on a long road trip? Or international trips? Or keeping track of things while frequently moving between hotels/friends' houses on a long trip? Or setting up your house for someone else to live in it temporarily? (I realize these are all incredibly privileged things to worry about, and I'm so grateful I get to do this) npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler About 3 weeks until my epic trip, that will include lots of lectures (both for researchers and the general public), meeting with research collaborators, and hopefully a tiny bit of vacation time. I have SO much to do to get house/farm animals ready for the farm sitter, packing, eating up freezer food... I am at the stage where I have lists started on scraps of paper scattered around my desk, my kitchen table, a notebook, and a couple on my phone and computer. Any good organization tips? npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler @nprofile…08mx Beautiful!! npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Everybody go read "Termination Shock" by Neal Stephenson, because apparently that whole scenario is actually about to start happening: https://www.politico.com/news/magazine/2025/11/21/stardust-geoengineering-janos-pasztor-regulations-00646414 npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I'm famous in Ituna! https://files.mastodon.social/media_attachments/files/115/566/773/846/997/092/original/715834ec7d71878d.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I cannot believe how much misinformation there is about comet 3I/ATLAS. It's just very cool on its own without having to be an alien spaceship conspiracy... Prof. Jason Wright wrote a great breakdown of all the ways Avi Loeb is wrong about his awful alien conspiracy theories, and why 3I/ATLAS is totally scientifically interesting in its own right: https://sites.psu.edu/astrowright/2025/11/09/loebs-3i-atlas-anomalies-explained/ npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler The other panelist was @nprofile…weex, and I learned a lot from his talk! He's studied light pollution in cities, and found that about half of light pollution isn't from streetlights, it's from headlights, signs, and shop/home windows. Horizontal light is the big problem! https://gfzpublic.gfz.de/rest/items/item_5035605_3/component/file_5035610/content He also pointed out that light pollution is growing faster than population, everywhere, and has been since WWII npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I just was on a panel for DarkSky International's Under One Sky conference. The panel was about novel and emerging sources of light pollution, I was there to yell a lot about Reflect Orbital. One of the other panelists was Jolyon Troscianko, who studies animal vision at night (how totally cool!) and he was talking about headlights as a source of very bright, pulsed light pollution. Moths lose their night vision for at least an hour after a headlight sweeps past, possibly all night. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Listening in to a meeting of radio astronomers: direct-to-cell satellites are SO BRIGHT that even though they're following the rules and broadcasting in their allocated bands, they destroy astronomical observations across a huge swath of frequencies. Radio telescopes were designed to operate in remote place far from cell towers. Now the cell towers are directly overhead, blasting into the incredibly sensitive detectors. Yet another way we're losing our window to the stars: bye bye SETI. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler @nprofile…55zn well that's at least the opposite of the Sunlight-as-a-Service Reflect Orbital dystopian techbro shit in orbit that I've been screaming about for the last few weeks. It just keeps getting worse! Shit! npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler A weird part about living in a very rural place is that I will never get trick-or-treaters at my house, and we have to drive to a town for trick-or-treating! But all the small towns around here are *SUPER* in to Halloween. Time for much candy to be acquired by my kids. (I'm glad it's only about 0C for trick-or-treating this year, so the candy isn't going to freeze in their bags like in past years...) npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler The 3I/Atlas wacko emails keep getting weirder and weirder. This one involved Trump changing the orbit of Earth. Thanks a lot, Avi, I blame you. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Your moment of anti-zen https://files.mastodon.social/media_attachments/files/115/436/430/264/016/618/original/5e017d7233585aea.mp4 npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler @nprofile…ppe2 No Starlinks! You have good timing (Beautiful photo!) npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I've gotten lots of notes from people today about 2 potential space debris falls. One looks like a Chinese rocket stage that fell on Australia (https://nitter.net/RaviHJagtiani/status/1979900950199386410 and https://satobs.org/seesat/Oct-2025/0078.html) And one is a suspiciously high altitude aircraft windshield strike over Colorado https://universeodon.com/@KrajciTom/115401237847834728. We just keep rolling the dice with reentries, and at some point a lot of people are going to die from it. https://www.nature.com/articles/s41598-024-84001-2 This is dumb. npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I always pull up a light pollution map for places I'm giving talks, and nothing makes me appreciate my dark skies more. https://www.cleardarksky.com/maps/lp/large_light_pollution_map.html Niagara, ouch that's some awful skies. I'm sorry. https://files.mastodon.social/media_attachments/files/115/386/065/671/539/633/original/2da652cf7b1fc520.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler Wow, I just got an email back from the ag minister, saying that they are pausing sales of Crown lands. Once in a while, complaining loudly to your government reps actually makes a difference, so keep doing it! npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I've got the house totally opened up to absorb that last bit of warmth! The animals seem to know they should be out and enjoying the sun also. It's supposed to be 25C today, and snow tomorrow. (And that is well within normal for Saskatchewan temperature swings, but I'm sure climate change has added its extra special boost to this). https://files.mastodon.social/media_attachments/files/115/356/841/162/539/524/original/d3f5d56fe81ca315.png https://files.mastodon.social/media_attachments/files/115/356/842/452/593/030/original/d7e1958723ac9ee0.png npub1dls3fr60k92efj3980hthkhjdgcqky8jawpg9tcqmkvd68dt70esy7hn0x Prof. Sam Lawler I have a bazillion new German followers (hello!), and I'm getting interviewed for German public radio in an hour about "sunlight as a service", and I don't speak any German and I've never been to Germany. The Fediverse is a truly magical place!