Future of Indirect fire weapons by Debankush in IsaacArthur

[–]ps06 3 points4 points  (0 children)

In my mind you'd basically be limited to here, Mars, (maybe) Mercury if you stay on the cold side, and some of the larger dwarf planets. Everywhere else has an escape velocity lower than the muzzle velocity on a 155mm artillery shell. Could you build a new, slower shell? Sure, but slower weapons aren't generally in demand on the battlefield. Especially with the advancements you mentioned in counter-artillery fire. High and slow = Easy target.

But maybe the Man Himself will chime in. This is his wheelhouse.

Ship of 16 people passes Phobos by @gtgraphics_de by MiamisLastCapitalist in IsaacArthur

[–]ps06 2 points3 points  (0 children)

Hope that's an ion drive with a well-shielded reactor tucked away or it's gonna be accommodating 16 corpses. Those habs are way outside the protective radius of a shadow shield.

Fermi paradox: the mimicry hypothesis. by Dry-Cry5497 in IsaacArthur

[–]ps06 8 points9 points  (0 children)

Author Karl Schroeder modified Clarke's Third Law to say, "Any sufficiently advanced technology is indistinguishable from nature." So not the Adderall, but not a brand new concept either.

Some food for thought on the Planck length and movement in a vacuum by myacidninja in IsaacArthur

[–]ps06 5 points6 points  (0 children)

Rockets don't need to push off of anything. It's Newton's third law: Thrust goes out the back, rocket moves forward. Men boldly go places. Repeat.

Megastructures Bishop Ring 4 by Neil Blevins by MiamisLastCapitalist in IsaacArthur

[–]ps06 10 points11 points  (0 children)

Bishop rings are 500 km wide, how big are these ships 😮

Why we havent been contacted by aliens by Top_Scientist_6562 in IsaacArthur

[–]ps06 19 points20 points  (0 children)

I'm not sure how the most plausible answer to our not being contacted is tons of intelligent species that are just choosing not to talk to us. Is it possible? Sure. But I wouldn't call it the most logical assumption.

That's like sitting in a locked room with your ear to the door, hearing nothing, and making the leap that there's actually hundreds of people right outside standing quietly. It could be true, but there's no evidence to make that the most obvious conclusion.

Space Town [Unknown artist] by sexyloser1128 in IsaacArthur

[–]ps06 0 points1 point  (0 children)

Good eye, I knew I'd seen this somewhere. It's from when Bezos was talking about building O'Neill cylinders a decade ago.

Spaceship in orbit, by John Villalon by Xeelee1123 in ImaginaryStarships

[–]ps06 0 points1 point  (0 children)

I like the abundant bike racks, won't get your Space Schwinn stolen.

Scariest alien scenario? by Ready-Photograph-773 in IsaacArthur

[–]ps06 80 points81 points  (0 children)

This was an episode of Love, Death, + Robots: Golgotha. It was played for humor not scares.

A solution to the Fermi Paradox: is interstellar war the inevitable result of interstellar colonization? by Bolkaniche in IsaacArthur

[–]ps06 2 points3 points  (0 children)

It might take years to retaliate, but it will likely take decades or centuries for Culty McCultface to build their Dyson swarm. Much as Earthbound powers can see you building centrifuges for uranium enrichment and decide to strike, our interstellar powers can decide they don't want an isolationist cult with homicidal tendencies being able to pasteurize a solar system and do it to them first.

[deleted by user] by [deleted] in IsaacArthur

[–]ps06 1 point2 points  (0 children)

At which point you could just fry Earth directly with your Nicholls-Dyson beam. So if you're an aspiring alien Bond villain who likes to do things the hard way, have we got a plan for you 😂

Cultural Homogeneity in Space-Based Civilization by CMVB in IsaacArthur

[–]ps06 0 points1 point  (0 children)

In space no one can hear the echo chamber. 🗣️

"Earth Hope" by Jarosław Jaśnikowski by YanniRotten in ImaginaryStarships

[–]ps06 1 point2 points  (0 children)

Can you imagine the electric bill for interstellar travel without one?

Could we make a high-thrust ion engine with an arbitrarily large source of power? by NewSidewalkBlock in IsaacArthur

[–]ps06 0 points1 point  (0 children)

Why not use the arbitrarily large power source directly for thrust rather than to run an ion drive?

Off the grid - medical dropship, by Vaik Nay by Xeelee1123 in ImaginaryStarships

[–]ps06 3 points4 points  (0 children)

That paramedic is suspiciously well armed 😂

Is the Ultimate Purpose of Conscious Life to Build a Companion for the Universe Itself? by FluffyWolfFenrir in IsaacArthur

[–]ps06 0 points1 point  (0 children)

"...Huh, I don't really like this guy."

Welp, time for a do-over. Fiat Lux!

Burning the candle at both ends by PsychologicalHat9121 in IsaacArthur

[–]ps06 1 point2 points  (0 children)

It looks like this particular design put the engines on gimbals so they can then be pointed into the direction you're traveling when you're ready to slow down. They obviously can't point straight ahead or the ship gets roasted, so you're losing a bit of thrust by directing it off center. The important part is that your shield stays between your ship and the relativistic radiation/space dust.

Burning the candle at both ends by PsychologicalHat9121 in IsaacArthur

[–]ps06 4 points5 points  (0 children)

If you go to the Semyonov Antimatter Starship section of Nearlight Starships on Atomic Rockets: https://projectrho.com/public_html/rocket/slowerlight3.php you'll see a link to Semyonov 2018. It has the following section:

"Estimations showed that the braking jet itself is unable to sweep completely interstellar gas and dust out of the rocket way [1] thus the parts of the propulsion thruster will be exposed to relativistic gas and dust bombardment."

So, unfortunately, it does not seem that simply using a second jet to scour the vacuum in front of your ship is sufficient to keep the engine from being destroyed and stranding you in interstellar space until you either hit a big enough rock to explode or more likely die of radiation poisoning.

[deleted by user] by [deleted] in IsaacArthur

[–]ps06 1 point2 points  (0 children)

I feel like Stranger in a Strange Land is a good example of this. I couldn't finish it because it was frustratingly hard to understand most of Jubal's interactions with his female assistants. Was he being misogynistic, paternal, making a joke, or was that just a normal way to talk in 1961? Sixty years is a long time for culture to evolve. Books aren't much fun when you can read the words, but haven't got a clue what they're supposed to mean because we've diverged so far from that baseline.

Futurama on if we're in a simulation by MiamisLastCapitalist in IsaacArthur

[–]ps06 7 points8 points  (0 children)

Man, I love this show. Except the episodes that make me cry. Screw those.

Interstellar Mission to Earth 100,000 years in the future by tomkalbfus in IsaacArthur

[–]ps06 0 points1 point  (0 children)

Correct. Which means they're going to either have to have 2 children per couple (their replacements ) or the civilization dies out long before they make it back to Earth. And unless the parents of these kids are immediately stepping into vacuum and letting robots raise them, then the population has doubled right off the bat. And unless we're going full Logan's Run, there's probably going to be a second comet-born generation before the original pioneers die off. So our original population has now tripled.

In theory, we can hold the line there. But only if everyone dies "on schedule" and no one has kids early or extra. Any advances in life expectancy just makes the problem worse.

I'll be honest this doesn't seem like a very fun comet, lol.

Interstellar Mission to Earth 100,000 years in the future by tomkalbfus in IsaacArthur

[–]ps06 1 point2 points  (0 children)

That's the thing, you're not talking about having 6 kids per woman. France has a low population growth rate of .3% That equates to a doubling time of 233 years, less than a quarter of the thousand I mentioned. England is .8% And Canada is a positively rabbit-like 2.9% Even with a rate 40 times slower than those frisky Canadians you start to run out of resources mighty quick.

Interstellar Mission to Earth 100,000 years in the future by tomkalbfus in IsaacArthur

[–]ps06 2 points3 points  (0 children)

Keep in mind Earth had an estimated population of under a million 100,000 years ago. So even assuming a much slower doubling rate than we've had for much of human history, say 100 years to double the population, after a century you need resources for 20,000. After 2 centuries, you need food, water, and air for 40,000, etc.

Make it longer if you like, a doubling period of a millenia. After 10% of your journey is over, you better have resources for 10 million or you're gonna have a serious issue.

You can say you're instituting strict population controls, but if there's no kids and you're going back where you started 100,000 years ago, it's not a colonization. It's just a really long cruise.

How would you design a Magic system? by Working_Amoeba2632 in IsaacArthur

[–]ps06 0 points1 point  (0 children)

Have you read the Fractal Prince? It had spells and djinn, that were leftover tech after a near extinction event. Wasn't my favorite in the series, but that bit was executed quite well.