Notices tagged with otd, page 7

#OTD in 1610.

Galileo Galilei makes his first observation of the four Galilean moons: Ganymede, Callisto, Io & Europa, although he is not able to distinguish the last two until the following night.

His work Sidereus Nuncius contains the results of his early observations of the imperfect and mountainous Moon, of hundreds of stars not visible to the naked eye in the Milky Way and in certain constellations, and of the Medicean Stars (later Galilean moons) that appeared to be circling Jupiter.
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Jacob Bernoulli was born #OTD in 1655.

He was an early proponent of Leibnizian calculus; along with his brother Johann, he was one of the founders of the calculus of variations. He also discovered the fundamental mathematical constant e. However, his most important contribution was in the field of probability, where he derived the first version of the law of large numbers in his work Ars Conjectandi.

https://en.wikipedia.org/wiki/Jacob_Bernoulli

#books #mathematics

#OnThisDay, 7 Jan 1939, French physicist Marguerite Perey discovers element 87, which she later names francium. It was the last element to be discovered naturally.

Perey was a student of Maria Skłodowska-Curie. She was nominated five times for the Nobel Prize but never received it.

#WomenInSTEM #ScienceHistory #WomenInHistory #OTD #History #WomensHistory #Histodons

#OtD 6 Jan 2021 supporters of Republican pres Donald Trump, including white nationalists and neo-Nazis, attacked the Capitol to overturn the results of the election. Rioters attacked police, injuring ~140, and resulting in 9 deaths. More on the far-right: https://shop.workingclasshistory.com/products/insurgent-supremacists-the-u-s-far-right-s-challenge-to-state-and-empire-matthew-n-lyons

#OnThisDay, 6 Jan 1971, the Militant Mothers of Raymur, 25 women from the Raymur Place housing project in Vancouver, blockaded railway tracks to get a pedestrian overpass installed. 400 children from the housing project had to cross the tracks - while trains were running - to get to and from school.

The bridge was built and is now named after the women.

#WomenInHistory #OTD #History #WomensHistory #CanadianHistory #Histodons

hat tip @workingclasshistory

#OnThisDay, 6 Jan 1907, Maria Montessori opens her first Casa Dei Bambini in Rome. Her aim was to improve the lives of the 50 working class children in her care.

Hundreds of schools worldwide now follow elements of the educational theory she developed through working with them.

#WomenInHistory #OTD #History #WomensHistory #Histodons

On this day 9 years ago, I started my company Open By Default. (It went through a pause and a move from Sweden to the Netherlands during that time.) If you need any help in anything becoming more open or advice about working in the open, I'm here to help! https://openbydefault.se #OpenByDefault #otd #OnThisDay

#OtD 5 Jan 1948 the Semiramis Hotel in Jerusalem was blown up by the Haganah Zionist militia to push Palestinian Arabs to leave the neighbourhood. Around 26 were killed and 60 injured, mostly Arab Palestinians, like Lutfi and Eleanora Aboussouans. More: https://stories.workingclasshistory.com/article/11417/semiramis-hotel-bombing

..... Er kommt erst in das Konzentrationslager Sachenhausen und später nach Dachau, wo er am 9. April 1945, kurz vor der Befreiung, ermordet wird.

Ehre sei seinem Andenken!

Sein Mut und seine Entschlossenheit werden uns für immer in Erinnerung bleiben und Mahnung sein: Nie wieder Faschismus, nie wieder Krieg!

#EchteHelden #EinsameHelden
#WeRemember #NeverForget #MenschenimWiderstand #München #Königsbronn #Göppingen #otd #OnThisDay #NieWieder #KeinVergeben #KeinVergessen

French educator Luois Braille was born #OTD in 1809. He was the inventor of a reading and writing system named after him, braille, intended for use by visually impaired people.

At just 15 years old, Braille began refining Barbier's system, developing a code based on a six-dot cell structure that allowed for efficient representation of letters, numbers, and even musical notation.

https://en.wikipedia.org/wiki/Louis_Braille

#braille #education #communication

English polymath Isaac Newton was born #OTD in 1642.

Newton's book Philosophiæ Naturalis Principia Mathematica, first published in 1687, achieved the first great unification in physics and established classical mechanics. Newton also made seminal contributions to optics, and shares credit with German mathematician Gottfried Wilhelm Leibniz for formulating infinitesimal calculus, though he developed calculus years before Leibniz.

https://www.gutenberg.org/ebooks/author/6288

#books #physics #mathematics

#OtD 1 Jan 1934 Nazi Germany enacted a law which forcibly sterilised more than 400,000 disabled people. Later they began murdering them, killing 250,000. Their rhetoric about disabled and ill people being a burden on workers is still widespread today https://stories.workingclasshistory.com/article/8069/nazi-sterilisation-law

4 Jan: feast of Angela of Foligno, d.1309 #mystic, Third Order of St. Francis, she eschewed enclosure #otd

On this day in 1983, the ARPANET network officially switched to using the TCP/IP protocol, effectively creating the Internet.

"January 1, 1983 is considered the official birthday of the Internet. Prior to this, the various computer networks did not have a standard way to communicate with each other."

https://www.usg.edu/galileo/skills/unit07/internet07_02.phtml

#internet #technology #history #OnThisDay #OTD

Happy birthday Milo Aukerman, singer of the American punk rock band The Descendents, born on this day in 1963 in Lomita, California

#punk #punks #punkrock #hardcore #hardcorepunk #miloaukerman #descendents #history #punkrockhistory #otd

#OnThisDay, 1 Jan 1983, 44 women climb the fence of Greenham Common airbase and dance on the missile silos.

The women-led Peace Camps at Greenham ran for nearly 20 years, protesting the siting of US nuclear missiles on UK soil. https://greenhamwomeneverywhere.co.uk/

Photo by Raissa Page.

#PeaceActivism #BritishHistory #WomenInHistory #OTD #History #WomensHistory #Histodons

#OtD 29 Dec 1890 the Wounded Knee massacre took place in South Dakota when US troops massacred over 200 Lakota men, women and children, many unarmed and fleeing. Learn more about Indigenous genocide and resistance in this book: https://shop.workingclasshistory.com/products/500-years-of-indigenous-resistance-gord-hill

In memory of Vivienne Isabel Westwood, English fashion designer, who passed away 2 years ago today.

As co-owner of the boutique "Sex", Vivienne Westwood was instrumental in bringing punk and new wave fashion into the mainstream.

#punk #punks #VivienneWestwood #history #punkrockhistory #otd

#OnThisDay, 29 Dec 1975, the Sex Discrimination and Equal Pay Acts came into effect in the UK. These made it unlawful to discriminate based on sex or marital status, and made it a requirement to pay men and women equally for equal work.

The laws were passed in 1970 but did not come into effect until 1975, giving employers time to prepare. One of the triggers for the laws had been the 1968 Ford machinists strike.

#WomenInHistory #OTD #History #WomensHistory #BritishHistory #Histodons

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German astronomer Maria Kirch died #OTD in 1720.

She was one of the first famous astronomers of her period due to her writing on the conjunction of the sun with Saturn, Venus, and Jupiter in 1709 and 1712 respectively. Kirch observed a comet in 1702, becoming the first woman to make such a discovery. However, the discovery was officially credited to her husband, reflecting the gender biases of the time.

https://en.wikipedia.org/wiki/Maria_Margaretha_Kirch

#astronomy #womeninStem