Georgi Marinov

[Massimo @Rainmaker1973]

Twenty-five years ago, the Massachusetts Institute of Technology made a bold move that most universities would never dare.

Instead of locking its world-class course materials behind campus walls, MIT decided to put nearly its entire curriculum online, completely free for anyone with an internet connection.

That decision gave birth to MIT OpenCourseWare (OCW).

What began as a bold experiment in 2001 has become one of the most significant educational initiatives in history.

Today, OCW provides materials from more than 2,500 undergraduate and graduate courses across virtually every discipline: physics, engineering, artificial intelligence, economics, biology, mathematics, computer science, and many more.

Anyone can access lecture notes, problem sets, exams, syllabi, and a growing library of video lectures, with no tuition, no application, and no account required.

According to MIT, more than 500 million people worldwide have used these resources over the past 25 years.

The impact has been profound. Students use it to ace exams, explore new fields, and launch careers. Educators around the globe integrate the materials into their own teaching. Many learners credit OCW with helping them pass professional certifications and unlock new opportunities.

Beyond its direct benefits, OpenCourseWare helped spark the global open education movement, inspiring dozens of other universities to share their knowledge freely online.

Even more impressive: the project was originally planned as a 10-year initiative. A quarter-century later, it's still expanding.

MIT now aims to reach 1 billion learners in the coming decade, while enhancing the experience with powerful new AI-powered learning tools.

[Nasdaq @Nasdaq]

Mission: @SpaceX.
Objective: Make life multiplanetary.
Exchange: @NasdaqExchange.
Status: Initial Public Offering. $SPCX

[Reid Wiseman @astro_reid]

Only one chance in this lifetime…

Like watching sunset at the beach from the most foreign seat in the cosmos, I couldn’t resist a cell phone video of Earthset. You can hear the shutter on the Nikon as @Astro_Christina is hammering away on 3-shot brackets and capturing those exceptional Earthset photos through the 400mm lens. @AstroVicGlover was in window 3 watching with @Astro_Jeremy next to him.

I could barely see the Moon through the docking hatch window but the iPhone was the perfect size to catch the view…this is uncropped, uncut with 8x zoom which is quite comparable to the view of the human eye. Enjoy.

[ksa 🏴‍☠️ @kosa12m]

Best paper I've read so far this month:

All elementary functions (sin, cos, tan, exp, log, powers, roots, hyperbolic functions, π, e, and even basic arithmetic) can be generated from just one binary operator:
eml(x, y) = exp(x) − ln(y)
…plus the constant 1.

[Tom Williams @tw__astro]

Hello @NASAArtemis Integrity 👋

Here's a view of the Orion spacecraft captured a few hours after lunar flyby, captured from my home in southwest UK.

At the time, Integrity was within the lunar sphere of influence, some 250,000 miles away from Earth.

#artemis #integrity #orion

[Physics & Astronomy Zone @zone_astronomy]

To think that we aren't just going "to the Moon," but rather traveling to meet it at an exact point in space... changes everything.
​It all comes down to orbital mechanics: arriving at the precise location, at the precise moment.
​One tiny error... and it simply doesn't happen

[fra @frapepppemaria]

All good things come to an end, and today it was comet C/2026 A1’s turn. We are now 100% sure the comet did not survive perihelion and disintegrated. I enjoyed following its journey a lot and i want to thank everyone who supported with likes and reposts. THANKS!

[Damian Peach🔭🪐 @peachastro]

Comet MAPS disintegrated dust cloud seen emerging from behind the Sun in this short animation from the SOHO C2 Coronagraph.

[Mobile Hacker @androidmalware2]

How to install #OpenClaw on Android and control it via WhatsApp using automated script #Termux

[All day Astronomy @forallcurious]

BREAKING🚨: Scientists discover interstellar object, 3I/ATLAS producing never-before-seen material── metal alloy mixture of nickel and chromium known as nickel tetracarbonyl.

This combination is only used in high-temperature industrial alloys, meaning it's rarely seen outside of complex industrial processes.

[Fascinating @fasc1nate]

A Logarithmic Map of the Entire Observable Universe

[Georgi Marinov @yrkki]

@tw__astro Maybe try the rings of Chariklo or Chiron sometime? But those will probably be beyond the scope.. 👍🏽👍🏽👍🏽 Great job on Uranus 🤩

[Georgi Marinov @yrkki]

https://t.co/PVDQv2Vynh

[Curiosity @CuriosityonX]

NEWS🚨: The Sun is waking up – and no one knows why

[All day Astronomy @forallcurious]

🚨: You’re looking at most accurate view of the Milky Way galaxy to date, based on 3 trillion observations of 2 billion individual objects over 11 years

[iGolkin @podskaite146740]

@Dialog_UA и треснул мир напополам
дымит разлом
и льется кровь идет война
добра с хуйлом
горит бензин в углах паук
плетет узор
и приближается к рф
ее позор

[Fermat's Library @fermatslibrary]

Here's an interesting approximation for the number 8

[Georgi Marinov @yrkki]

@fermatslibrary And in general,
∀n; n ∈ {9, 89, 889,...}
Σₓ₌₁ⁿ (x*10^x) / Σₓ₌₁ⁿ (x*10^(n+1-x)) ≈
≈ 8*10^(⌈log(n)⌉ -1)

[ESA Webb Telescope @ESA_Webb]

🆕 Uranus has a new moon! 🌕

Meet S/2025 U1, discovered in images taken by Webb’s Near-Infrared Camera. 

Read more: https://t.co/XTSIWI2dZS 1/3

[Phys.org @physorg_com]

#A new CRISPR technique targeting DNA methylation enables gene activation without cutting DNA, offering a safer approach for treating #GeneticDiseases such as #SickleCell. @NatureComms https://t.co/t6g4J15pWx https://t.co/ju5wz1xc61