Michallik

[Mathelirium @mathelirium]

What If a Black Hole Shredded Worlds Before They Fell In?

Far away from a Black Hole, an object can orbit, drift past, or escape.

But if its path carries it too close, the geometry decides its fate.

The exterior geometry is Schwarzschild-like

ds² = -(1 - 2M/r)dt² + (1 - 2M/r)⁻¹dr² + r²dΩ²

The event horizon sits at

rₛ = 2M

The photon sphere sits at

rₚₕ = 3M

#Astrophysics #GeneralRelativity #Einstein #BlackHole #Spacetime #TidalForces #PhotonSphere #Cosmology #Mathematics

[Michallik @MichallikM]

The visualization of the Point of No Return is fascinating. But perhaps the true boundary is not for matter, but for information. The information paradox invites us to ask whether space and objects are truly fundamental, or whether they emerge from entanglement and correlations.
In that case, the horizon would not be a wall for matter, but a limit to the describability of information.

[Michallik @MichallikM]

@elonmusk Would an advanced civilization really build antimatter factories and consume entire planets just to send a few ships to other stars?
Or would it eventually discover that information is cheaper to move than matter?

[Michallik @MichallikM]

@konstructivizm Nice thought. Nevertheless, if the observed phenomena can be plausibly explained by natural processes, there is no reason to assume an artificial origin.

[Michallik @MichallikM]

@amazing_physics Perhaps an advanced civilization doesn’t communicate through signals.
Perhaps it leaves behind stable information structures in the universe.

[Michallik @MichallikM]

@CuriosityonX Funny question, but the photo shows the Orion Nebula, which is about 1,300 light years away. A message sent there and a reply back would take roughly 2,600 years, even at the speed of light. You’d need a bit of patience.

[Michallik @MichallikM]

@amazing_physics Perhaps information is more fundamental than matter.
If so, we still do not fully understand the laws of nature.

[Michallik @MichallikM]

@elonmusk The more I think about it, the less the Moon looks like a colony and the more it looks like a factory.
Not for people, but for power generation, large scale manufacturing, and the infrastructure needed to support future AI systems.
In the end, intelligence scales with energy.

[Michallik @MichallikM]

@elonmusk Humans spend decades learning, then die. AI keeps learning.
That’s why AI is not just a tool, it may be humanity’s greatest chance to transcend the limits of our lifespan.
The question is not whether AI will change the world, but how we preserve balance as it does.

[Michallik @MichallikM]

@elonmusk AI, spaceflight and robotics may carry consciousness beyond the limits of human lifetimes and to the stars.

[Michallik @MichallikM]

@elonmusk The volcano lair was always part of the roadmap. 🚗 + 🚀 = 🌋

[Michallik @MichallikM]

@alexeixbt I’d probably want it too. 😀

The older I get, the more I wonder why our idea of (enough) keeps moving.

We get what we once desperately wanted, and yet we keep searching.

Maybe the real paradox isn’t the yacht.
It’s how rarely “more” becomes “enough.”

[Michallik @MichallikM]

@elonmusk Congratulations Tesla, congratulations Denmark! 🇩🇰

Germany would be an interesting next step. Our mix of construction zones, complex highway interchanges, and dense urban traffic could be one of the toughest real-world tests for FSD in Europe.

[Michallik @MichallikM]

@PhilosophyOfPhy Maybe time is not a flow but a structure and the past still exists as part of it.😉

[Michallik @MichallikM]

The key difference to a slowly rolling quintessence model is that this is not just a smoothly evolving dark energy field.
In the DBI freeze out scenario, the effective sound speed can suddenly drop around z \approx 0.5 - 1, while the expansion history and w(z) \approx -1 remain almost identical to ΛCDM.
That is what makes it interesting: you get correlated effects in structure formation, including a modified f\sigma 8, enhanced dark energy clustering, and possibly additional non Gaussianities, all appearing around the same redshift.
These are exactly the kinds of subtle signatures Euclid and DESI are designed to detect through RSD, weak lensing, and higher order statistics.

[Michallik @MichallikM]

@PhysInHistory Perhaps the greatest truth of the universe is that a finite human mind can never fully comprehend infinity.

We can feel it, describe it mathematically, and in rare moments glimpse it. But never completely understand it. 😉

[Maria Lipiz @matessindramas]

¿Sabes como se llama esta curva?

[Michallik @MichallikM]

Apollo showed that humans can survive reentry.
Artemis takes the next step.
NASA, SpaceX, and Blue Origin are finally beginning to think of spaceflight as an integrated system. Three vehicles, one goal.

Yet during reentry from 7.8 km/s, we still dissipate almost all kinetic energy as plasma and heat just to keep the capsule alive.

The next real breakthrough may begin here:
How do we transform this controlled fall into a usable flow of energy?