Submitted 2 weeks ago by fossilesque@mander.xyz to science_memes@mander.xyz
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Found a calculator: www.calctool.org/relativity/space-travel
Assuming we want to accelerate at a constant 1g for half of the travel and then brake at 1g for the second half of the travel we would need 151 years to get there but only 9.794 years would pass on the ship. Depending on the mass of the ship we would need coupe million/billion tons of fuel (anti-matter).
Oh only a billion tons of anti-matter. Good thing we’ve already made a few nanograms, so in a billion years or so we’ll have plenty.
Yeah, and antimatter converts to pure energy with e=mc^2 what means that 60 grams contains like Hiroshima worth of energy
How can it take 151 years to go 150 light years when not close to lightspeed most of the time? I get the 9 year thing, but 151 years seems wrong.
Smarter people than me on the internet calculate that at constant 1g you only need 2.5 years to get very close to speed of light. So I guess you accelerate fast enough and reach ‘almost speed of light’ very early in your travel and total time is almost as if you traveled at speed of light the whole time.
The closer you get to lightspeed, the slower you accelerate (from an outside perspective). It’s actually close to lightspeed for most of the time.
I just used the calc, it’s closer to 152 years. Which I assume means acceleration at 1g for about a year to reach .999c, and deceleration for the same time.
I just confirmed with dV= a*t, a year of 1g(9.8m/s/s) gets you just over the speed of light. I think it’s more complicated than that, If I remember right relativistic speeds require more and more energy to accelerate so you can’t ever “reach” light speed.
Most of the journey is spent traveling very close to light speed. It's not a linear ramping up and ramping down of speed, since it takes more energy to accelerate the closer you get to light speed. Rather you quickly accelerate to near light speed and spend most of the trip working on that last small bit of velocity.
Constant acceleration at 9.8m/s^2 in a given direction will bring you close to the speed of light eventually, but yeah, I’m also not super sure how this math checks out
50% chance of being in the habitable zone
Imagine sitting on a spaceship for 151 years just to discover your parents’ bet was wrong
9.974 years
Just imagine sitting on a spaceship for 151 years to find out they got there first because in 151 years space travel tech has improved so much they can travel there in 35 years.
Time for Bussard o invent those collectors
So a bit quicker than terraforming Venus by chucking several oceans worth of ice at it, and some cyanobactera once it cools down in a few hundred thousand years.
What about accelerating 1g for 16 hours of ‘day’, then 8 hours of 3g ‘night’. It would be one hell of a weighted blanket lol.
It’s not just blanket entire body experience that force including internal organs… So i guess sleeping with tgat would be more than just uncomfortable
It would only save you a few months
I say have a spinny ship that does that with the shape of the ring. Some kind of parabolic bullshit I’m sure there’s a way to get it to math without having to have a 1g ring and a 3g ring but that works too
And you’ll only need 315.3 million GWh per ~80kg person… plus 3.941 million GWh per kg of supplies, equipment and ship weight…
Great Scott!
Oh and also thats just the pure energy for acceleration/deceleration, not life support, steering, thrust ineffeciencies etc… 😅
So 340 PWh per person. A couple of guys with a static bike and a dynamo and that’s it😜
Your statement makes things sound a bit confusing.
To clarify, if you are inside the ship, 152 years will pass.
No, the people in the ship will experience less time then 152 years. Relativity tells us the faster an observer is moving, the slower it moves through time.
I’m guessing you probably go faster than 0.9C after six months, given that the difference is 1 year.
That would be us
*they
Is there another similar format for this meme, but without this dipshit in it?
Beautiful, Bernie is much preferred, thank you!
Yeah this one should take over
Only 150 light years away?! Wow, that’s practically next door! Now all we need to do is figure out how to go light speed and even then it’ll take a further 300 years just to know if the colonists got there safely or not!
When the first colonists arrive the planet will already be inhabited by humans since 100 years after they left we invent the warp drive. And trying to intercept them mid travel and board them on to the new ship is impossible since they travel near the speed of light in the darkness of space.
I’m pretty sure that’s a sidequest in Starfield. The ECS Constant colony ship set off in 2140 to colonise a planet, arriving in 2330 at the planet Paradiso, which had become a luxury resort planet for the rich, because shortly after the ship left, humanity invented the grav drive and every ship just zoomed right past them.
They’ve already sent galactic missiles to wipe us out before we can ruin them.
Any civilization capable of sending missiles across the galaxy should be more than capable of simply sending a tight beam of gamma radiation to sterilize the planet. No need for earth shattering explosions. Just a flood of radiation engulfing the planet for a minute or two and everything not buried a mile underground will be dead.
And that’s if they don’t bother to just blow up the sun.
Unfortunately it is technically in New Jersey.
I’m gonna eat that planet
Can we trick a few billionaires into going there
Not without condemning their personal staff to a living hell
I‘m sure theres plenty of maga and crypto bros that would be willing to serve their billionaire sugar daddys to suck on their feet.
Let’s tell them they’re next
Now all we need is an FTL
Yeah then we can use that to go back in time and save Harambe, and then we won’t need another planet!
If we can go back in time, we can recount the election, find those missing votes and have the person Americans actually wanted become president. Al Gore
Harambe was a consequence, not the cause.
See! All kinds of fun things possible!
Honestly, if FTL travel is never invented, the future is going to be so incredibly boring.
The future doesn’t belong to us. It belongs to AIs.
(Not claiming that LLMs are anywhere close to human-level AI)
Quickly, let’s build a rocketship so we can fuck that planet up, too.
For 150 light-years I’m afraid we’ll need something more advanced than rockets
if you are traveling at sublight speeds, it will take you 10s of thousands of years if not more.
“Only” 150 light years away
We could start sending radio waves there and if something happens to be alive there, the response wouldn’t arrive until 300 years from now. 🫠
That is so close tho
Source: www.unisq.edu.au/news/2026/01/earth-meets-mars
(Nice!)
Send the pedofile billionaires
How could would be to have radio communications with similarly tech-evolved aliens.
Well. This is quite a pearl.
I don’t have time to read a 16-page paper in detail, but I did want to know how the host star compares to everyone’s favourite local solitary K-type dwarf, Epsilon Eridani. It’s slightly less massive (~0.7 solar mass versus 0.8 for ε Eri) and quite a bit less bright (difference of about 0.1 solar luminosity), but I especially wanted to know about the age of the star. ε Eri is quite young and frothy, but the investigators here infer from the star’s motion that it belongs to the thin disk, up to a whopping 10 billion years old.
So we are definitely not talking about an ε Eri-type system. So that should be mean no dust disks, no crazy activity from the star, and no newish planets still carving out their places through the system.
You’ve really got to wonder about such an old planet, however cold and quiescent it may be. The potential paths for climatic evolution on such a world boggle the mind, however cold it is. You could get an episodically or formerly active world like Mars, a beautifully unstable oscillatory world like Earth, or something completely different. Assuming any atmosphere, of course (safe assumption?). And that’s without considering whether there are any other planets in the system.
I really wouldn’t spend too much time thinking about this candidate detection, as we have literally seen just the one transit, and we will need to observe this fellow for a while to confirm the discovery, learn about other planets in the system, and so on. The investigators themselves note that the transit was shallow (meaning difficult to detect), but the good news is that the host star is fairly bright, well within reach of amateur equipment. I wonder if citizen scientists will be able to follow the transits.
Exciting times.
Alright, Jimbo, let’s see its atmospheric composition.
Imagine arriving there after 150 years only for the colony to fail due to a random prion in the environment.
If we could accelerate at a constant 1g, flip, and decelerate at a constant 1g, the trip would take ~152 years… from Earth’s perspective. If you were onboard, time dilation would make the trip about 10 years.
Our two guaranteed inhabitable worlds are in alpha centauri and sirius
-94° is apparently habitable?
That’s the reaction of billionaires when they realize they have a backup planet while they kill earth. Everyone else is fucked
How neat, its name even comes in High Definition!
Yess, that is how capitalism will work.
Friday night HD 137010 b run boys, who is in?
Vince McMahon is a rich snob
Great side project for keeping busy after climate change…
Too good to be true. The climate has to be something like Venus, or worse
137 is my favorite and lucky number, so I’m gonna decide this is the one that we find life on.
But does it have a moon?
None of you smelly monkeys are welcome; keep your filthy paws off my home.
in_my_honest_opinion@piefed.social 2 weeks ago
Cool lets pack up the billionaires and ship em over there.
tomiant@piefed.social 2 weeks ago
302 years later the ship comes back with a pile of gold and a note:
“Delicious. Please send more.”
robocall@lemmy.world 2 weeks ago
Everyone likes gold. This would be a good movie!
ExLisper@lemmy.curiana.net 2 weeks ago
We could save a lot of money on life support system.
mattyroses@lemmy.today 2 weeks ago
They’ll pull themselves up by their bootstraps on the way there!
rbn@sopuli.xyz 2 weeks ago
Would be a funny conspiracy theory that this is how humans spawned on earth. Not evolution, but just some alien civilization shooting all their pedos into space, some of which were lucky to land on a habitable planet.
ProfessorHoover@infosec.pub 2 weeks ago
You should read Hitchikers Guide To The Galaxy. One planet decides to ship off all their “useless” people on a colony ship pretending they’re saving them from the apocalypse and everyone else is coming soon.
ChilledPeppers@lemmy.dbzer0.com 2 weeks ago
That could mess up the biggest computer ever, which is supposed to answer the question to which the answer is 42!
Mongostein@lemmy.ca 2 weeks ago
With their work ethic they’ll be fine!
robocall@lemmy.world 2 weeks ago
Let’s just tell them we’re sending them to the new world and blow them up in the space rocket ship.
wonderingwanderer@sopuli.xyz 2 weeks ago
Don’t spread the virus…