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Jens Scheidtmann

@grimaldi

Enterprise Architect, visual astronomy, mediocre astrophotographer, nerd content. #PiFinder

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15.09.2023
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Latest posts by Jens Scheidtmann @grimaldi

tagesschau 20:00 Uhr, 05.03.2026
tagesschau 20:00 Uhr, 05.03.2026 YouTube video by tagesschau

Komisch, da soll bei der Tagesschau (20:00 Uhr heute) eine Rakete bei einer Schule einschlagen, aber fรผr mich sieht es nach einem Raktenstart aus: youtu.be/UwQwt38d2Zo?...

05.03.2026 20:01 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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๐Ÿ”ญ ๐Ÿงช #EduSky

๐Ÿ‡ซ๐Ÿ‡ท Durรฉe du jour en fonction de la date et de la latitude.
๐Ÿ‡ฌ๐Ÿ‡ง Length of the day, according to the date and latitude.

#Python

Script here:
www.astrolabe-science.fr/duree-du-jour/

17.02.2026 17:21 ๐Ÿ‘ 37 ๐Ÿ” 14 ๐Ÿ’ฌ 4 ๐Ÿ“Œ 1

Why risk polar alignment? Reflective scotch tape and a red headlight to the rescue.

17.02.2026 15:59 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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From 2017

17.02.2026 06:47 ๐Ÿ‘ 6840 ๐Ÿ” 1540 ๐Ÿ’ฌ 176 ๐Ÿ“Œ 59
Preview
Eclipse Coolness

xkcd.com/2914/

17.02.2026 15:41 ๐Ÿ‘ 13 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Newborn baby sleeping peacefully, swaddled in soft blankets.

Newborn baby sleeping peacefully, swaddled in soft blankets.

17 February 1944 | A Hungarian Jewish girl, Juliska Revesz, was born in Pecs.

In July 1944 she was deported to #Auschwitz and murdered in a gas chamber. She was 5 months old.
---

โ–ถ Watch our webinar about deportations of Jews from Hungary to Auschwitz: https://youtu.be/M42znxofU5Q

17.02.2026 15:00 ๐Ÿ‘ 447 ๐Ÿ” 142 ๐Ÿ’ฌ 22 ๐Ÿ“Œ 15

Zu Hause

17.02.2026 15:15 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

it may also help to be reminded that the heavily marketed value proposition of ai for all of society is that it will do all the work for us so that we can spend time doing fun hobbies and relaxing - and youโ€™re at ground zero of that tale being exposed as a big fat lie

15.02.2026 17:29 ๐Ÿ‘ 161 ๐Ÿ” 21 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Trust is everything.

We canโ€™t have truly honest relationships if we canโ€™t trust.

We canโ€™t have science without trust.

We canโ€™t have government without trust.

Trust is everything.

15.02.2026 16:30 ๐Ÿ‘ 45 ๐Ÿ” 8 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 1
Photos from 2012, 2016, and 2022 showing the gradual dimming of M31โ€‘2014โ€‘DS1 as it collapsed in on itself to form a black hole.

Photos from 2012, 2016, and 2022 showing the gradual dimming of M31โ€‘2014โ€‘DS1 as it collapsed in on itself to form a black hole.

Twelve years ago, the massive star M31โ€‘2014โ€‘DS1 brightened then gradually faded away. This behavior is consistent with a failed supernova where the star's outer layers fall back before collapsing into a black hole! ๐Ÿงช

www.science.org/doi/10.1126/...

13.02.2026 23:52 ๐Ÿ‘ 11 ๐Ÿ” 2 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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China's Xinhua news agency has just published this editorial cartoon in response to Trump's rejection of climate policies.

It is pretty clear that China views this as a HUGE geopolitical fumble by the US leaving the field clear for China's to win the global race to clean-tech hegemony

14.02.2026 12:20 ๐Ÿ‘ 1272 ๐Ÿ” 530 ๐Ÿ’ฌ 26 ๐Ÿ“Œ 55
Graphik: Volkswirtschaftliche Schรคden fรผr Deutschland in Euro, pro Jahr, aufgrund von ...
Sozialbetrug: 260 Mio
Tricks bei der Erbschaftssteuer: 3,6 Mrd.
Steuerhinterziehung: 100 bis 200 Mrd.
Werte fรผr 2023 und 2024, Quellen: Netzwerk Steuergerechtigkeit, Deutsche Steuer-Gewerkschaft, Bundesagentur fรผr Arbeit

Graphik: Volkswirtschaftliche Schรคden fรผr Deutschland in Euro, pro Jahr, aufgrund von ... Sozialbetrug: 260 Mio Tricks bei der Erbschaftssteuer: 3,6 Mrd. Steuerhinterziehung: 100 bis 200 Mrd. Werte fรผr 2023 und 2024, Quellen: Netzwerk Steuergerechtigkeit, Deutsche Steuer-Gewerkschaft, Bundesagentur fรผr Arbeit

Wir brauchen mehr Steuerfahnder! #TaxTheRich #Erbschaftsteuer
๐Ÿ“ท @correctiv.org ๐Ÿ‘

14.02.2026 06:46 ๐Ÿ‘ 449 ๐Ÿ” 193 ๐Ÿ’ฌ 17 ๐Ÿ“Œ 5
A silhouette of a couple kissing under a starry night sky.

A silhouette of a couple kissing under a starry night sky.

oh, to be kissed while stargazingโ€ฆ

06.02.2026 18:35 ๐Ÿ‘ 85 ๐Ÿ” 8 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 2
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Datenreport รผber das Einkommen der Autor*innen in Deutschland Viele verdienen wenig โ€“ nur 5,7 % der Autor*innen in Deutschland kรถnnen ausschlieรŸlich vom Schreiben leben.

Ich kann ebenfalls nicht ausschlieรŸlich vom Verkauf meiner Bรผchern leben. Allerdings kann ich vom Schreiben und Zeichnen und allem, was damit zu tun hat, leben. Und jedes Jahr Silvester stoรŸe ich mit mir selber an, dass es wieder ein Jahr lang geklappt hat. Es ist beileibe nicht selbstverstรคndlich.

04.02.2026 15:46 ๐Ÿ‘ 83 ๐Ÿ” 18 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

my grandmother, an Auschwitz survivor, was Anne Frankโ€™s neighbor in Amsterdam, and Oma thinks this comparison is perfectly apt

28.01.2026 02:37 ๐Ÿ‘ 7843 ๐Ÿ” 1951 ๐Ÿ’ฌ 114 ๐Ÿ“Œ 37
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Kฤkฤpล Cam: Rakiura the kฤkฤpล โ€“ 2026 nest YouTube video by Department of Conservation

The 2026 Kakapo Cam is live!

www.youtube.com/live/BfGL7A2...

23.01.2026 05:28 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Black and white portrait of a girl with a bow in their hair, wearing a collared shirt and sweater.

Black and white portrait of a girl with a bow in their hair, wearing a collared shirt and sweater.

18 January 1925 | A Hungarian Jewish woman, Vera Weisz, was born in Kisvรกrda.

In 1944 she was deported to #Auschwitz. She did not survive.
---

๐Ÿ“– Learn about deportations of Jews from Hungary to Auschwitz: https://lekcja.auschwitz.org/en_6_dep_zydow/

18.01.2026 21:00 ๐Ÿ‘ 423 ๐Ÿ” 95 ๐Ÿ’ฌ 15 ๐Ÿ“Œ 4

I spoke to the Secretary-General of NATO, Emmanuel Macron, Keir Starmer, Friedrich Merz and Giorgia Meloni.

Together we stand firm in our commitment to uphold the sovereignty of Greenland and the Kingdom of Denmark.

18.01.2026 21:04 ๐Ÿ‘ 14328 ๐Ÿ” 3329 ๐Ÿ’ฌ 631 ๐Ÿ“Œ 226
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Lebesgue-Integral โ€“ Wikipedia

Sehr schรถner Wikipedia Artikel: de.wikipedia.org/wiki/Lebesgu... Well Done, Wikipedia!

17.01.2026 06:26 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Made my day! ๐Ÿ˜‚

14.01.2026 17:04 ๐Ÿ‘ 5 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I feel him. ๐Ÿ”ญ

11.01.2026 07:01 ๐Ÿ‘ 20 ๐Ÿ” 2 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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The evidence shows that cities with protected bike lanes are safer for ALL road users.

Not just people on bike, ALL road users.

And thatโ€™s just one of many benefits. Quieter, more efficient, cleaner, more pleasant - for everyone.

Build more bike lanes.

10.01.2026 17:21 ๐Ÿ‘ 45 ๐Ÿ” 18 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
A joyful child with curly hair, wearing a sleeveless dress, raises their arms up in excitement in an outdoor setting.

A joyful child with curly hair, wearing a sleeveless dress, raises their arms up in excitement in an outdoor setting.

9 January 1934 | French Jewish girl Huguette Szterck was born in Paris.

On 24 August 1942 she was deported from #Drancy to #Auschwitz in a transport of 1,008 Jews. She arrived at the camp on 26 August. She was murdered in a gas chamber after selection.

09.01.2026 21:00 ๐Ÿ‘ 468 ๐Ÿ” 131 ๐Ÿ’ฌ 20 ๐Ÿ“Œ 6

There should be more quantitative reasoning in early science curricula. Kindergartners can understand and implement simple measurements and analysis, both important aspects of most fields of science and research. Why are so many science curricula/experiments for kids qualitative only? ๐ŸŽ๐Ÿฅฝ๐Ÿ‘ฉโ€๐Ÿ”ฌ๐Ÿงช๐Ÿงฌโš›๏ธ #math

08.01.2026 23:36 ๐Ÿ‘ 18 ๐Ÿ” 2 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

@grimaldi.bsky.social #addBirder

09.01.2026 05:45 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Kapapo mating season 2026/27 has started! 2 eggs were discovered in Pearlโ€˜s nest. There are 236 Kapapo alive. ๐Ÿฆ‰

09.01.2026 05:41 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Kolorierte Illustration eines wรผtenden kleinen Vogels, der auf einem Ast sitzt. Seine schwanzfedern ragen senkrecht in die Hรถhe, die brustfedern sehen aus wie ein weiรŸer Rauschebart

Kolorierte Illustration eines wรผtenden kleinen Vogels, der auf einem Ast sitzt. Seine schwanzfedern ragen senkrecht in die Hรถhe, die brustfedern sehen aus wie ein weiรŸer Rauschebart

Selbes bald von nahem mi Fokus auf dem Gesicht

Selbes bald von nahem mi Fokus auf dem Gesicht

Noch ein anderer Winkel mit Fokus auf der Signatur

Noch ein anderer Winkel mit Fokus auf der Signatur

๐Ÿ˜ 

07.01.2026 17:29 ๐Ÿ‘ 451 ๐Ÿ” 65 ๐Ÿ’ฌ 13 ๐Ÿ“Œ 0

There will be no leap second in June 2026 in UTC time. ๐Ÿ”ญ๐Ÿงช

06.01.2026 21:21 ๐Ÿ‘ 8 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 1

I had a Reddit post removed from an โ€œAskโ€ subreddit because the mods said it could have been answered โ€œby a search engine.โ€

Have any of them used a search engine lately? Search engines donโ€™t answer shit anymore! Theyโ€™re all completely enshittified. Why do you think I was on Reddit?

05.01.2026 00:02 ๐Ÿ‘ 4189 ๐Ÿ” 396 ๐Ÿ’ฌ 87 ๐Ÿ“Œ 0

Zelensky on Venezuela:

โ€œAbout Venezuela? How should I respond to that? Well, what can I say? Ifโ€ฆ If it is possible to act with dictators like this, it means the United States knows what to do next. Thank youโ€

Omg I love it.

04.01.2026 01:32 ๐Ÿ‘ 19307 ๐Ÿ” 3541 ๐Ÿ’ฌ 397 ๐Ÿ“Œ 183