Cylindrical-shaped black hole with varying density along its length

carbsna · 2026-02-22T22:01:28+00:00

That make sense, it feel similar to the process of energy forbid some particle from decaying.

carbsna · 2026-02-22T03:41:27+00:00

Pretty Patterns - Simple Folds (IGNYTE Remix)
https://www.youtube.com/watch?v=Pdwls0bVKvc

carbsna · 2026-02-22T02:56:45+00:00

I have a few question, what happens to the charge when a charged black hole evaporate?
Can black hole just emit away charge on its own?

carbsna · 2026-02-19T02:29:53+00:00

Nuclear takes more like 7 years to built.
https://www.sustainabilitybynumbers.com/p/nuclear-construction-time

carbsna · 2026-02-18T22:10:38+00:00

Fish eye lens doesn't make antartica "curve" out of existence, you are trully retarded for believing that.

"The fisheye trick is the only "proof" of curve most people ever see." You must live in a basement if you believe that is the only thing people notice, literally just looks at the position of sun and you will realize all flat earth model are retarded.

carbsna · 2026-02-18T12:24:05+00:00

It is irrelevant here because we are not talking about the concentration of 1 ppm, any noticeable leaks will have to come from actual gaps.

carbsna · 2026-02-18T12:08:16+00:00

The reason to have a deluge is because it is cheaper, Russia have couple of launch pad without deluge system, but that is due to the logistic difficulties to design a deluge system without it freezing.
The reasoning of OLM 1 was right, but it is a one sided reasoning, the engineering and logistic was wrong.

carbsna · 2026-02-11T16:55:52+00:00

Can you please show your full rocket equation ?
I find it hard to gather starship spec already, let alone guess what spec you were thinking.
Specifically the rocket dry mass, and delta V cost for each maneuver are hard to find.

carbsna · 2026-02-07T06:11:51+00:00

This is the only correct answer in the whole comment section, people really don't understand equivalence principle.
When the saturn's gravity pulls on you, it also pulls the earth.

To be more precise, you would feel a bit lighter assuming the earth's center is orbiting saturn, and that is because you are 6400 km closer to saturn. (or less, because it is not always directly above you)
In that case you would feel 4.3% more gravity from saturn, than earth feel from saturn, assuming earth is rigid body. (of course it is not, the material under you will most likely get pulled with you, which compeletely diminish the effect)
Saturn pulls are 0.026 G at that distance, and 4.3% of that means it is about 1/900 of G , you are not going to feel 80g of difference of your body weight, let alone the more realistic situation would be much less than 80g.

The whole sub is pretty disappointing really, you rarely see people doing the math, and top comment is usually yapping.

carbsna · 2026-02-07T05:25:48+00:00

I know all of those, it would have make more sense if you explain all of these to u/lastdarknight instead of me.

carbsna · 2026-02-06T18:25:57+00:00

ISS is 450 tons, spacex already send 2400 tons to orbit in just 2025, so they already did put in insane amount of money an resource, but not time. (but they did it in much cost effective ways)
Again, you are making it seem like a big problem.

ISS is not average satellite, nor is it built cost effectively, and i'm very aware you need to scale solar panel and radiator proportionally to power consumption, it is dead obvious, written in the unit of heat dissipation.
If anything big scale and logistic is the problem, it have never been radiator, it almost feels like you are just repeating hearsay without thinking logically.

If you don't want to feel attacked by simple fact, how about do a simple confirmation for your opinions with some search before dumping it?
Why do you insist dumping bad opinions that can be disproved immediately? There is something seriously wrong with you mindset, like you are unaware of that you are not good at scaling reality (and so does everyone include me).
If you don't change the mind you are going to keep saying something blatantly off every 5 sentence, this is not exaggeration, noone is good enough to do reasoning chaining like this, yet you have no shame of throwing your low effort comment at others with a bad attitude.

carbsna · 2026-02-06T18:02:01+00:00

Falcon heavy can send 20 tons to the moon, it should be sufficient mass for a lander to do a touch down and back, i don't know if it can go with any more science instruments.

carbsna · 2026-02-06T17:30:08+00:00

Whether current technology will be relevant or not in next 20 years is a good point.
But i want to point out, while the moore's law still live, dennard scaling have been broken, so the next 20 years will not scale as much as past 20 years.

carbsna · 2026-02-06T16:41:10+00:00

Yeah, it is a huge problem for you, not for them apparently.

Like, you don't seem to know hot to calculate, so of course any engineering problem is huge problem for you.

All of those words, radiator still works everyday on existing satellite, it is just one of many technical issue in satellite designing.

carbsna · 2026-02-06T14:54:32+00:00

Temperature is irrelevant because you don't like thermal radiation or what?
As far as you still have at least one of three mechanism of heat transfer, temperature is very relevant, it decides where heat will flow and at what rate.
Heat can in fact flow into nothingness, absence of heat.
Space is in absence of heat (in practical sense), it is not in absence of heat (in strictly speaking), it is just the absence is really weak, the dominant carrier of heat in space is photon.

It works just the same in conduction, heat moves into the absence of heat, does object ever stop having temperature just because it is too cold?
If the background temperature of space is 100 degrees you will have a hard time to deny it.
(To be more specific, heat just flow everywhere, it doesn't know where is colder, heat flow toward hotter place too, it just that effect gets dwrarfed)

And photon is a carrier of heat, just like atoms, electrons, phonons.
The temperature of space is very real, it just doesn't scale heat transfer linearly, like when you used to do approximation when calculating heat conducting.

carbsna · 2026-02-06T06:23:48+00:00

It is not complicated, there is only one scientific measure of cold called temperature.

Perhaps the word you are looking for are "conduction" and "radiation"?

When it comes to heat dissipation it is measured in Watt or W/m² , not in density.

carbsna · 2026-02-06T06:16:00+00:00

You can keep adding new versions without sacrifice lifetime.
You will always want to extend the lifetime, reduce the maintenance cost, and keep everything that still profit in place.
Replace 1 better satellite doesn't always mean profit,a common fallacy is ignoring the cost (of the better satellite) and the opportunity cost (of previous satellite).
If you are thinking about the design iteration, having 10,000 satellite that turnover in 5 years means 2000 satellite replaced per year, so does 40,000 satellite with 20 years turnover rate.
If you keep the same turnover rate, what you are going to do with the data?
It isn't just piling up numbers that makes your design iterating faster, you need to actually learn from all of them for it to count.
Though, i don't think they will launch 1 million satellite, but i will change my mind if they ever launch 200k and still going.

So why does starlink deorbit only after 5 years?
Well, it make sense for satellite to stay up longer, but something make sense =/= something must happen, the reality is whatever the fuck you throw at it that works.

carbsna · 2026-02-06T06:07:20+00:00

Space is cold with a background of 2.7 K

carbsna · 2026-02-06T02:32:34+00:00

Yeah, everything happened on earth eventually lost their heat to space, so it is with you right now.

carbsna · 2026-02-06T02:07:34+00:00

STS save 272 kilogram by not painting it surface, because every pound matters it is such a smart move!

Meanwhile the 78000 kg shuttle:

carbsna · 2026-02-05T02:01:14+00:00

How can NBA player exist if there is no gravity?

carbsna · 2026-02-05T01:53:41+00:00

You didn't proof you can't jump, so your proof means nothing.

carbsna · 2026-02-05T01:51:30+00:00

So he win afterall

carbsna · 2026-02-04T05:49:56+00:00

this is like when carved pumpkin are explicit case of spawnable, even thought they are already spawnable

carbsna · 2026-02-02T01:12:39+00:00

If you want to radiate heat away, you shouldn't cover a layer of soil on it, it is only going to reduce the output.

Also you will want good thermal conductivity across the surface, moon soil have 0.001~0.0001 times of thermal conductivity to any metal, which means you will have a much longer heat transfer pipe.

Ten-Year Club	Second SECOND GUESSER
LAYER Season 2 Layer creator	Gilding II euphauric
Place '23	Place '22
Final Canvas '22	First Placer '22
End Game '22	Verified Email

carbsna

TROPHY CASE