RegularJoe

joined 1 year ago
[–] RegularJoe@lemmy.world 4 points 22 hours ago* (last edited 15 hours ago)

The size of the event horizon of a black hole depends on the mass of the black hole. The greater the mass, the larger the radius of the event horizon.

One idea you may have heard is that black holes go about sucking things up with their gravity. Actually, it is only very close to a black hole that the strange effects we have been discussing come into play. The gravitational attraction far away from a black hole is the same as that of the star that collapsed to form it.

So, if you are a star or distant planet orbiting around a star that becomes a black hole, your orbit may not be significantly affected by the collapse of the star (although it may be affected by any mass loss that precedes the collapse). If, on the other hand, you venture close to the event horizon, it would be very hard for you to resist the “pull” of the warped spacetime near the black hole. You have to get really close to the black hole to experience any significant effect.

If another star or a spaceship were to pass one or two solar radii from a black hole, Newton’s laws would be adequate to describe what would happen to it. Only very near the event horizon of a black hole is the gravitation so strong that Newton’s laws break down.

https://wisconsin.pressbooks.pub/astronomy/chapter/chapter-24-section-24-5-black-holes/


solar radius is a unit of distance, commonly understood as 695,700 km and expressed as R⊙{\display style R_{\odot }}, used mostly to express the size of an astronomical objects relative to that of the Sun, or their distance from it.

695,700 kilometres (432,300 miles) is approximately 10 times the average radius of Jupiter; 109 times the 6378 km radius of the Earth at its equator; and 1/215 {\textstyle {1 \over 215}} or 0.0047 of an astronomical unit, the approximate average distance between Earth and the Sun.

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

At about 0.01 au (two solar radii would be 0.0094), the sun as a black hole would not affect the Earth, nor Venus, nor Mercury.

Mercury is 0.4 astronomical units away from the Sun

https://science.nasa.gov/mercury/facts/

Based on that, we would stay put. A black hole does not emit light, including sunlight. Sunlight warms our planet (so it's going to get mercilessly cold). Many plants would die and they would stop making oxygen. And while you can argue that we can't live without heat from the sun, with 8 billion humans plus all the animals on the planet, I suspect we'll run out of air before the cold kills us. But I could be wrong about asphyxiating before freezing to death.

See also https://science.nasa.gov/universe/what-happens-when-something-gets-too-close-to-a-black-hole/

Edit: as others on here have noted, our star isn't big enough to become a black hole. The above assumes "But what if it did?"

[–] RegularJoe@lemmy.world 22 points 2 days ago

Cliff Clavin approves.

 

Spock and Kirk. Spock asks, "Did we do it? Did we save the daylight?"

[–] RegularJoe@lemmy.world 5 points 4 days ago* (last edited 4 days ago)

Book series? Try Michael Moorcock's Elric series.

https://en.wikipedia.org/wiki/Elric_of_Melnibon%C3%A9

[–] RegularJoe@lemmy.world 25 points 4 days ago

EFF has an article on this, too. They have links on how to limit ad tracking on iphone and android.

https://www.eff.org/deeplinks/2026/03/targeted-advertising-gives-your-location-government-just-ask-cbp

[–] RegularJoe@lemmy.world 52 points 1 week ago* (last edited 1 week ago) (4 children)

Per the article,

"Elon Musk is an aggressive and irresponsible salesman," the plaintiff said. "Who has a long history of making dangerous design choices, and overpromising features of his products."

The plaintiff now expects the American car brand "to properly design, test, market, inspect, repair, and recall the subject Cybertruck."

As of February 2026, Elon Musk's net worth is estimated to be around $852 billion according to Forbes.

[–] RegularJoe@lemmy.world 18 points 2 weeks ago (15 children)

Nvidia's Vera Rubin platform is the company's next-generation architecture for AI data centers that includes an 88-core Vera CPU, Rubin GPU with 288 GB HBM4 memory, Rubin CPX GPU with 128 GB of GDDR7, NVLink 6.0 switch ASIC for scale-up rack-scale connectivity, BlueField-4 DPU with integrated SSD to store key-value cache, Spectrum-6 Photonics Ethernet, and Quantum-CX9 1.6 Tb/s Photonics InfiniBand NICs, as well as Spectrum-X Photonics Ethernet and Quantum-CX9 Photonics InfiniBand switching silicon for scale-out connectivity.

[–] RegularJoe@lemmy.world 8 points 2 weeks ago

...and your father smelt of elderberries!

[–] RegularJoe@lemmy.world 125 points 2 weeks ago (22 children)

While the image is "Gottfrid Svartholm, one of the co-founders of The Pirate Bay in his work station", he sure looks like Shaggy from Scooby Doo.

[–] RegularJoe@lemmy.world 7 points 3 weeks ago

I hadn't heard of her. So I looked for her performing. I found this:

https://www.youtube.com/watch?v=xzisVAB0k40

Wow, good performance. 7 albums in two years? Wow.

[–] RegularJoe@lemmy.world 7 points 4 weeks ago

In a study of the device, Hall and his team found that healthy adults fart some 32 times a day—although some tooted a mere four times, while others passed wind 59 times in a day.

The Smart Underwear is just a first step. Hall also launched the Human Flatus Atlas to recruit and measure flatulence across the population. In particular, the researchers are interested in studying people who eat high-fiber diets but don’t fart much and people who fart a lot.

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