Hubble Space Telescope orbit height versus the solar sunspot number. Periods of higher activity are associated with faster drops in height. (not as up to date as the plot from @planet4589.bsky.social) We're also looking at shorter periods, for effects of flares and geomagnetic storms

Here's Benjamin Donn's 'Improved Analemma' (1770, Bristol). Can be used at any latitude to find the sunrise/sunset times, elevation, solar time, as well as the rising, setting & southing of stars. 🔭 🧪 #EduSky #astrohistory 1/3

On this day: On 24th February 1582 Pope Gregory announced the papal bull 'Inter gravissimas', which introduced the Gregorian calendar (since year is 365.2425 days long, calendar was out by 10 days so they had to remove those days).

User guide for this astronomical tool now available, in french and in english. 🔭 www.astrolabe-science.fr/double-maque...

Happy s39th birthday to SN 1987A- the closest to us since the invention of the telescope! 🥳 Always a good excuse to share my cross stitch evolution over time in radio of SN1987A. Everything is to the correct scale etc bc cross stitch is the original pixel art. 🔭🧪 #sciart

If you scale each entry on the periodic table to show the relative abundance of elements, this is what the composition of the universe looks like: hydrogen, helium, and a pinch of everything else. (This simple graphic was created in the early days of the web. I miss that madly creative era.) 🧪🔭

This time-lapse of Hubble images taken between 1994 and 2016 shows a ring of ejected material superheat and glow in X-ray as the shockwave from supernova 1987A slams into it. (2/n) Credits: NASA, ESA, R. Kirshner (HSCfA, Gordon and Betty Moore Fnd), P. Challis (HSCfA)

I just added an ebook to my collection described as "unputdownable". Please let me grieve in private. Thank you.

"Die Sternen Uhr", by Miersch (1822). A star chart of circumpolar constellations. The green arc is the local northern horizon for some place in 🇩🇪. 🔭 🧪 #EduSky 1/2

When the big breaking news finally comes, before they even have the chance to lower the flags to half-mast, the entire world will be like...

If you liked this experiment, I published a full piece today in the same vein: a text that gets 100 years older with every section, from a modern blog post to a medieval chronicle. It's a single story spanning 1000 years of English. See how far you get. www.deadlanguagesociety.com/p/how-far-ba...

discrete = separate discreet = unobtrusive The E's are SEPARATED by the T in 'discrete.'

"Who questions much, shall learn much, and retain much." [Francis Bacon, English philosopher, 1561 - 1626]

The surge of pride when your kid sends you a good meme

I'mq giving a virtual talk Saturday afternoon (2:30pm PST / 5:30pm EST) for San Francisco Mensa, called "Wormholes, Spacewarps, and Tunnels to Otherwheres." The talk is open for anyone! Register and get the link here: space-talk.link/FEB

It was the worst of times, it was the fucking worst of times. Just really shit times.

Chaos: Making a New Science "Miniscule differences in input could quickly become overwhelming differences in output" Sale: $23.99 to $3.99 by James Gleick Rating: 4.5/5 (3,236 Reviews) #Chaos #Science #Math #Fractals #Books #Nonfiction #BookSky

Democrats in Congress won't fight back against fascism & corporate greed, so Justice Democrats is building the Democratic party we deserve—through primaries. Today, we're rolling out our full 2026 slate: our vision to build a team of fighters to build working class power in Congress.

Caption: Help students see themselves in physics with this impactful lesson that opens doors to their future in the field! Join us on Tuesday, Feb. 24 at 7 p.m. ET for our Women in Physics workshop! Don't miss out! ⚛️💻 🔗Sign up with the link in our bio!

People just don’t reference the Farmers Almanac anymore and it shows.

Asteroid 2025 MH348, discovered last year, is possibly a trojan of Neptune. #astro 🔭

Put! It! Back!

“Sometimes we have to force ourselves upon them” declared the child rapist.

Oh, man. Tom Noonan died? His performance as Francis Dolarhyde in Manhunter is one of the most terrifying, mesmerizing I've ever seen in a film.

“STOP TALKING ABOUT IT” is basically the ceremonial ribbon cutting for everyone to start talking about it.

🔭 🧪 #EduSky 🇫🇷 Durée du jour en fonction de la date et de la latitude. 🇬🇧 Length of the day, according to the date and latitude. #Python Script here: www.astrolabe-science.fr/duree-du-jour/

I'm pretty pretty sure that the definitive reading of this phase, by Tim Curry in CLUE, did not include the words "false herring". And I do so hope you heard his voice in your head just now (with the pauses) correctly say "red herring".

I see anti-fash knitting charts, I repost anti-fash knitting charts!

How Hard Could Getting Voter ID Be? Read more cartoons! ---> #PoliCartoon Help us make more! ----> patreon.com/barry

“She’s not from here.”

Useful : How do I convert a IPython Notebook into a Python file via commandline? On the command line, you can use nbconvert: 'jupyter nbconvert --to script [YOUR_NOTEBOOK].ipynb' or even inside a notebook with '!jupyter nbconvert --to script [YOUR_NOTEBOOK].ipynb'

I Carry A Torch For You*

#astrohistory 🔭

🔭 🧪 Another astronomical paper instrument by 🏴󠁧󠁢󠁳󠁣󠁴󠁿 Ferguson (~1770). History of Science Museum, Oxford. A double-sided paper (card?) instrument. The 'Universal Analemma' (left). The 'Nocturnal or Star-dial' (right). 1/5 🧵

It took us 38 years to discover that “They Live” is a documentary.

Why am I never going to shut up about how terrible Gavin Newsom is? Because I don't like this cross-platform inorganic effort to shut people up about how he much he sucks. I'm not letting a bunch of bots tell me what to do. It's pure oppositional defiance. Lol

*pinches nose* Time for your quarterly reminder that degenerate is a Nazi term, indicating the literal degeneration of a gene pool. Things this referred to: interracial marriage! Queerness! Disability! It pretty much indicates they don’t think you’re human! It’s not a cutesy way to say “leftist”

I don’t really know what I expect in posting this, but maybe some people see it and can learn from it. I’ll call it “lessons from an unwilling immigration attorney.” 1/

Wild that a sitting member of Congress, a Republican no less, feels compelled to post this.

Pam Bondi For @rawstory.com Follow my work and writing on Substack: nickanderson.substack.com

New pronoun labeller just dropped! Instructions are in the thread and as this is something that becomes more useful the more people are using it, plz do pass it along

Harold and Maude is a movie that speaks specifically to its time, but which I mean any time between 1971 and forever. Rest In Peace, Bud Cort.

RIP Bud Cort. How else would you even pay tribute to him.

💔Bud Cort 1948 – 2026

🎉 NEW FREE PATTERN!! Available at ko-fi.com/hereticdesigns or use the ko-fi link via my linktree in bio. 🧵 This is a cross stitch pattern based on the list of countries as listed/said by Bad Bunny in the 2026 Superbowl Halftime show. The header is what was written on the football he carried.

There is no protocol like it in the world, because it was created in a different one. And every other world died. SMTP. Email is the final gasp of the original dream of electronic sovereignty. Of a federated world of peer communication. It's the final one. The last protocol.

ICE is currently holding around 80,000 detainees. Nazi Germany didn't reach this number in its formal camp system until 1942, nine years after seizing power and three years into the war.