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On January 2, 1729, German astronomer Johann Daniel Titius was born. He is best known for formulating the Titius–Bode law, a hypothesis that the bodies in some orbital systems, including the Sun’s, orbit at semi-major axes in a function of planetary sequence. The formula suggests that, extending outward, each planet would be approximately twice as far from the Sun as the one before.

scihi.org/johann-daniel-titius

#astronomy #historyofscience #otd

@mammut Thank you for visiting. Which parts of the article did you find the most interesting?

The World’s First Selfie 📸✨

The image was taken in 1839 by an amateur chemist and #photography enthusiast from Philadelphia named Robert Cornelius. Cornelius had set his camera up at the back of the family store in #Philadelphia. He took the image by removing the lens cap and then running into frame where he sat for a minute before covering up the lens again. On the back he wrote: “The first light Picture ever taken. 1839.” (#Smithsonian) #Daguerreotype #selfie #photograph #vintagephotography

As a young man Johannes Kepler thought he most resembled a
pet dog.
The Renaissance Mathematicus Christmas Trilogy: Part 3
Portrait of the Mathematician as a Dog
thonyc.wordpress.com/2022/12/2

The Renaissance Mathematicus Chistmas Trilogy 2022 Part2. Who was Charles Babbage, what sort of family did he come from, where did he grow up, how was he educated?
A Portrait of the Mathematician as a Young Man
#Babbage #biography
thonyc.wordpress.com/2022/12/2

Renaissance Mathematicus Christmas trilogy 2022 Part I: The amicable Isaac
In general Isaac Newton is presented as an asocial, grumpy old man, who loved nobody & was loved by nobody. However, in realty, Isaac had acquaintances with whom he was on good terms, genuine friends & also that he was a kind & loving family man.
#Newton #biography
thonyc.wordpress.com/2022/12/2

The Urra=hubullu glossary, dating to the second millennium BCE, which lists important words in both Sumerian and Akkadian. The words are separated into categories, including types of vehicles, names of stars, and types of animals and plants. The title of the glossary comes from the first entry, which contains the words for "interest-bearing debt" -- urra in Sumerian, and hubullu in Akkadian.

#history #histodons @histodons

tidy ↔️ zeitig
to throw ↔️ drehen

Sometimes words with the same origin grow so far apart you wouldn't think they're family.

Click the images to see fifteen unlikely foursomes of English, German, Dutch and Frisian words.

Sometimes their forms diverged, sometimes their meanings.

I've got a lot of new followers not from the birdsite. Which is cool! By way of introduction, I'm a linguistic anthropologist working across a bunch of disciplines: #anthropology, #linguistics, #cogsci, #histmath, etc. Narrowly? I work on number systems and numeracy in their cultural contexts. I'm not a mathematician but I do collaborate with them. I analyze numbers (written and spoken) as social and semiotic tools, which gets into writing systems and literacy. So that's me, welcome all!

#FossilFriday Geologizing with Dickens, part III.

Charles #Dickens contributed to the popularity of Geology in the 19th century. In 1865 he wrote an article about #MaryAnning’s life: "Her history shows what humble people may do, if they have just purpose and courage enough, toward promoting the cause of science...”  #WomenInSTEM

paleonerdish.wordpress.com/201

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