Spectrum744

Pen name of Frederik Vantomme, hobby physicist since Natuur & Techniek ‘86 and before.

[Jason Wright @Astro_Wright]

People should remember that these interstellar comets come through the Solar System *all the time.* Only in the past decade have we had the technology to notice them.

[Jason Wright @Astro_Wright]

For those that are still following along at home.

https://t.co/E05WkVlWAy

[Anton Gerashchenko @Gerashchenko_en]

A Russian woman who is not afraid to speak the truth says:

“Of course, our great strategist Putin has many “achievements,” but the most outstanding ones, in my opinion, are the following.
He replaced truth and reality with wild propaganda. He increased Russia’s borders with NATO by more than one and a half thousand kilometers. He raised the retirement age, yet there is still no money for pensions. But when it comes to war, there is money - and that’s the paradox. He turned Russia into a terrorist state, despised now by the entire civilized world.”

[(((Tendar))) @Tendar]

German Chancellor Friedrich Merz:

„Putin is a war criminal. He is perhaps the most severe war criminal of our time that we see on a large scale. We must be clear about how to deal with war criminals: Leniency is out of place here.“

[Brave Romania @brave_romania]

🇲🇩 Maia Sandu: The Russian Federation wants to control the Republic of Moldova from autumn onwards

[UATV English @UATV_en]

Sandu Warns: Moldova’s Pro-Russian Threat
Moldovan President Sandu: Pro-Russian election win could make Moldova a Kremlin tool against Ukraine, threatening security and EU path.

[Kyiv Insider @KyivInsider]

Russia isn’t giving up on seizing control of Moldova's government.
https://t.co/zIST1FlWxG

[Quanta Magazine @QuantaMagazine]

Happy 100th birthday, quantum mechanics!
https://t.co/HKlGPhQru2

[Black Hole @konstructivizm]

Metal sticks together in space

In a vacuum, like outer space, two pieces of identical metal can stick together without heat or pressure. This phenomenon is called cold welding. On Earth, this reaction is impossible because there is always a layer of oxides or moisture between the surfaces. In a vacuum, these layers disappear, and the metals “think” they are one, so their atoms fuse at the molecular level.

Cold welding is a problem for satellites and spacecraft, where moving metal parts (such as hinges or fasteners) can unexpectedly stick together permanently. The effect was first observed in 1985 on an ESA satellite, and engineers have been taking it into account in their designs ever since. Different materials, lubricants and coatings are used to prevent unintentional sticking in a vacuum.

[Phil Trubey @PTrubey]

I keep running into people who think wireless technologies are going to replace fiber optics for communications. Either Wifi, Cellular or Satellite (Starlink).

It's never going to happen.

This picture of the electromagnetic spectrum shows one reason why. All wireless communications use radio frequencies, whereas fiber uses optical frequencies which are up 10,000 times higher. A single strand of fiber can carry about 5,000 times as much data as a radio transmission.

The inset image of an approx. 1" fiber cable carrying 1,732 individual fiber strands is another reason why fiber is king. You can't run thousands of radio transmissions in the same dense area since the signals interfere with each other, but you can run an unlimited number of fiber cables along side each other.

The fact is that wireless and fiber are complementary technologies. We need both. Wireless for ships, airplanes, rural, WiFi and in city iPhone coverage. And then all those radio based wireless services forward all those data packets to the Internet using fiber.

[Spectrum744 @spectrum744]

@amitisinvesting @LHDALLAS @OpenAINewsroom Yes, we understand the fraud very good. Just like the FTX SBF AMC and GME’s tokens were ‘backed’ 1:1 by real shares until they weren’t

[Spectrum744 @spectrum744]

Seems like a third interstellar object has been detected #A11pl3Z Welcoming a New Interstellar Object: A11pI3Z | by Avi Loeb | Jul, 2025 https://t.co/bHp1bh4vgW

[Tau Day @TauDay]

Happy Tau Day, everyone! 2025 marks the 15th anniversary of Tau Day and The Tau Manifesto. Please enjoy this year’s State of the Tau update with some of the happenings since Tau Day last year.
https://t.co/bqh5CyBPph

[U.S. National Science Foundation @NSF]

Are you ready to see the cosmos like never before? The NSF-DOE @VRubinObs is primed for its debut! 🔭

📺Tune in on June 23, 2025, at 11 a.m. EDT for #RubinFirstLook images: https://t.co/EA9bhNpDBK

#CaptureTheCosmos

[Will Kinney @WKCosmo]

This. I think what we're going to see is highly skilled people embracing AI as a powerful tool instead of being replaced by it. The only losers will be the people who insist on rejecting it altogether.

[Nicholas Fabiano, MD @NTFabiano]

Handwriting leads to widespread brain connectivity - typing does not.

[Spectrum744 @spectrum744]

@CburgesCliff 😂

[Spectrum744 @spectrum744]

@CburgesCliff