#Science

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Attention: alien alert! 👽 Who noticed it?!

[1] Next, we’ll show the spectra of different lights. In front, we have LED lamps, in the middle – energy-saving lamps, and in the back, old incandescent bulbs.
The spectra – you probably remember from school: when sunlight passes through a prism, you get a rainbow. Here, we have diffraction gratings, and I’ll demonstrate this now.

[2] I’m holding the diffraction filter in front of my smartphone camera, and you can see this funny little rainbow.

[3] On the left, you see colors from an energy-saving lamp – rarely used nowadays – and next to it, the old incandescent bulbs. The energy-saving lamps show only five colors, while the incandescent bulbs display the full spectrum.

© Video: Benjamin Winkel, MPIfR/Effelsberg @HIprocessor

I find it annoying to keep seeing here post which likely are generated from within which requires me to sign up after clicking on them.

How are people dealing with this?
Do you all have by now another mirror account on bluesky? Am I the only one here on mastodon, speaking with mirrors and avatars? 😅

Probably not. But I keep seeing "pressure" towards bluesky.

However, I like it here so far, like some remote beach with few people...

replied to Ars Technica's status

Colleges should go ‘medieval’ on students to beat AI cheating, NYU official says | Fortune

AI·Colleges and Universities

Colleges should go ‘medieval’ on students to beat AI cheating, NYU official says

By Jason Ma, Weekend Editor, August 31, 2025 at 6:24 PM EDT

In medieval times, students often listened to teachers read from books, and some schools even discouraged students from writing down what they heard, Shirky said. Getty Images

  • Amid the raging debate over the proper role of generative AI in schools, a vice provost at New York University suggested colleges revive some educational practices that date back to medieval times, namely focusing on oral instruction and examination in the classroom. That comes as students have increasingly relied on chatbots to complete assignments.

Educators have been struggling over how students should or should not use artificial intelligence, but one New York University official suggests going …

https://www.skyatnightmagazine.com/space-science/rogue-stars-roam-between-galaxies

Random Tuesday thought (but not really!): I thought it was bad enough that we had a rogue star here on earth, but today I learnt that that there are 675 rogue stars between our Milky Way galaxy and the Andromeda galaxy and that there are over a trillion in Virgo! Moreover, there’s such a thing as rogue black holes, which totally sucks. I hope someone’s tracking them.

Ein herzliches Willkommen an alle Teilnehmenden der ESA-FAIR 2025! 🌍🚀 Eine neue Runde der -FAIR Space Radiation Summer School hat begonnen – eines der führenden internationalen Ausbildungsprogramme in der Strahlenforschung. Zwei Wochen lang tauchen Nachwuchswissenschaftler*innen aus aller Welt intensiv in die Herausforderungen der kosmischen Strahlung ein – ein zentrales Thema für die Zukunft der .
https://www.gsi.de/start/aktuelles/detailseite/2025/09/02/esa-fair-summer-school-2025