The Big Problem With Interstellar Travel

-This video was made possible by Brilliant. -Start learning intuitively with Brilliant for 20% off by being one of the first 200 people to sign up at -So you probably know that stars are pretty far away -But you may have also dreamed about visiting one since you were a kid. -Science fiction has taught us that travelling to a distant star system may not be too far off in the distant future. -But Science fiction rarely gets into some of the largest problems that surround this concept. -I’ve made one video before discussing the possibility of humanity reaching another star in your life-time and to summarize that one, -The best you can hope for is *Maybe* a tiny probe the Proxima Centauri system sometime in a few decades That might be capable of taking some pictures of the planets there But as for you actually going yourself in visiting a planet that orbits a distanse star Unless you can figured out how to become immortal you likely never will And here are some of the biggest reasons why The distances are obviously huge and traveling across those distances will take a lot of time The fastest speed that humanity has ever achieved with a man-made object was using a Helios 2 prom which ** to 240 000km/h That’s fast enough to circle around the entire Earth in just about 10 minutes. With going in that speed will still take about 19 000 years of just reach Proxima Centauri – the nearest other star to the Sun But lets speculate for a moment now that perhaps this is the fastest speed that we ever could reach using a spaceships with actuall humans on board We build a ship with about 100 person crew that we populated-self over generations until we gets to Proxima Centauri This concept is known as Generation Ship and the people on board will live their entire lifes without every living the small space of the ship before arriving at its destination over 600 generations of people will live at this bizzare exsistance before finally arriving 19 000 years later at their destination and goal: The first humans to ever colonised antoher star system. The only problem is tho: after they finally do arrive, they not only discover, that humans are already there, but have been there already for tousands of years and have completly colonised the new planet with milions of people and huge cities. The reason this could happend is that the people of 2018 assumed the speed of 240 000 km/h was the fastest speed we could achieved on a ship and so they send up their colonists under that assumption. However, after 19 000 years into their yourney, they were still 18 000 years more away from getting to their planet. Back on Earth, tho, a thousand years of technological development was enough time to discover much faster forms of space travel. And the people od the year 3018 will be capable of sending out colonist on the ship that could reach the planet in just 5 000 years. So their ship endend up passing the one l*** in 2018 arrived to the destination planet thousands of years before it and have enougt time to completly develop civilisation there before the 2018 ship arrived and discover their entire 19 000 years of deal and suffering was all for… nothing. Who knows what psychological or feel self- problems such an experience could create for those people But this entire problem is known as the Wait Calculation When is the optimal time for humanity to send colonist out to another star? The concept was first written about by Andrew Kennedy in a paper written in 2006. Kennedy assumed, that it have to be a minimum travel time to any place in the Universe. And that ment was our technology was close to achieving it we could safely send colonist out and avoid the risk of living too early for nothing. But deciding when the best time to live is.. is pretty complicated. And think about the implications that poses to any would-be space traveler: Would you volunteerly signed up to be locked in the space ship for the rest of your life, along with your children’s life and their children’s, and their children’s and so on houndred of time over? When the only pay-off will be being told that: One day humanity will colonise another planet star thanks to your sacrifice? But then you remember the Wait calculation and release that only pay of is actually a huge gamble and you sacifice maybe worthless and along run. You’ll be insine to take that risk and everybody else will feel the same way, so convincing anybody to get on the Generation Ship like this at almost anytime in the future would be almost impossible..unles you forced them to. Would be colonist always assumed, that peopole in the future would just create faster form of transportation, that would completly negate their own journeys? That is until we descover a way to travel at or near light speed. It appears, that the speed od light is the Universe highest speed limit. And so, naturally, if humanity ever discover a way to travel near it, potential colonists could rest their sure that they sacrifices their travel that never be en vain. Like the explorers aboard the ABC Jungle Fruit are cruisers searching for resourses

100 Replies to “The Big Problem With Interstellar Travel

  1. those people in 3018 are TOTAL DICKS!!!!!

    like they couldn't have intercepted their 2018 ancestors to let them know TECHNOLOGY GOT BETTER in the future….. 🙄

  2. thats really silly, asume generation ship reach half was and we on earth develop new spaceship technology which are more faster, you said they will reach on destination first will start leaving there and then this generation ship will arrive late.

    but why not take people of generation ship with them (with faster spaceship) when faster spaceship was passing by with generation ship. thats too silly. once we arching that tech we can give them life. until they will go with that generation ship.

  3. You are forgetting that there are plenty of people who would leave just to get away from the lunatics running Earth.

  4. The only possible way is to mimic a gun which project a bullet like ship. A gun shot is as speed as light travels, only thing they need to figure out is will a living thing survive inside? But of course we can make adjustments right?

  5. If wait calculation was the problem, we can send people to rescue the people who left before greater speeds could be reached.

  6. How rude! The advanced technology ship didn't even give them a heads up? "Hey, just an FYI, we'll be getting there about 5,000 years ahead of you guys. Have a nice life."

  7. I love this distance analogy, if our sun was the size of a pea (1/4 inch ball), Proxima Centauri would be about 125 miles away

  8. and also 3000 years of technological development is/was enough time to build spaceships that could reach the planet in just 750 years so it is not just them who will have there joureny for nothing but the people of the year 3018 will be even more cross and sad about there joureny being all for nothing.

  9. ok, im sick of people using maximum speed numbers as sun periapsis. this is the fastest AND LOWEST point of an orbit, which will get exponentially slower the farther out you go, even on a escape trajectory, for example voyager 1 is going about 38,000 mph, or about 61,000 kph. if you wanted to be traveling at an average of that speed, you would have to have a starting velocity of much higher to end up slowing down to speeds similar to 240,000 kph.

  10. There was a movie somewhat like this. Called pandora. Really fucked up movie, but that's what humans do.

  11. The technology to travel as fast as light has been available but has been suppressed for purposes of maintaining monetary control of the world through scarcity and dominance. Thats what broke the heart of Nikola Tesla

  12. "The people of the year 3018 'W E R E' capable of sending out colonists on a ship that could reach the planet in just 5000 years."

    Wait, so RealLifeLore is fom the year 31,018?

  13. Surely you’d stop on the way past to pick them up, same destination, probably the same route. We’d be a bit shit flying past them for thousands of years without saying Hi.

  14. what do they mean too late to explore the world to early to explore the universe our generation will be the first people on mars and possibly discover life on europa does that not count as exploration?

  15. But then the aliens on that other planet would have already killed the 3018 humans, and then the 2018 humans as well

  16. Couldn't they send them off, and build the better ships, catch up to that ship, and relay the passengers to the new planet from the old ship to the new planet, with the new technology. It can be a generational traveling relay station in space. YAY 🤷🏿‍♂️

  17. This video misses the point in sending people on the earlier ship in the first place. The only reason to send people off on a generation ship in the near future ( slow ship) would be if the Earth was in trouble and the environment and human extinction was inevitable. In this scenario the later ship would never happen because the reason behind the earlier ships departure was humanity's impending doom.

  18. The people of 2018 are not so stupid (or at least most of them, I hope) as to assume that some arbitrary speed is the fastest that they can ever go. Why should you be so narrow-minded to do so? There have been theorized, some of them even tested and used, numerous methods of propulsion that could get a ship even up to a significant fraction of the speed of light. Have you heard of ion engines or photonic sails, not to mention the more advanced methods such as nuclear pulse propulsion or interstellar ramjets? You'll obviously need an awful lot of resources, but you're not building a fucking interstellar ship for cheap anyway.

  19. meh given that no way wifi gonna be there, give me about 10,000,000 petabytes worth data comprised of movies/songs , education, games, necessaries etc on-board and some hot astronaut babes and sign me up, guns too if any aliens wanna fu*k around

  20. Maybe instead of generations the people could be on cryo sleep where the body is frozen and not age for a few thousand years. Also this could save a lot of food and water.

  21. Short of achieving light speed (or even anything close to it), how would you best guess space travel to other star systems will happen, say, in 600 years? 600 years ago, most civilizations werent even capable of leaving their continent. Now look at us. Hard to imagine how much will change in the next 600 years.

  22. 1 month in space can decreases bone density by 1%.
    1 week of radiation exposure in space is equivalent 1 year of radiation on Earth
    Longer zero gravity state deteriorate eyesight permanently.
    Being in space weakens the heart because of the decreased blood mass.

    I just leave this here.

  23. Everyone is talking about speed and None is talking about accélération..? What is the higher accélération people walking around can live with..! That is the real limitation about the speed you can Reach…

  24. Typical of selfish humans that those on the faster ship wouldn't think of picking up the others on the slower ship.

  25. How would you aim the ship? I see three options, all terrible 1) You don't. Use math when you leave and hope that nothing changes your trajectory or that of your destination in the 19,000 years you're travelling 2) Use a fuel source, which runs out in like 2 generations 3) Give Jesus the wheel and miss completely

  26. face it, no ones going anywhere for a very very very very loooooooooooooooooooooooonnnnnnnnnnnggggggggg time

  27. 'Spatial absurdity' is a new theory challenging our understanding of distance. Basically it says that if there were two of you, no matter how far away from each other you go, you're still sharing the same point in space. It's obviously built upon our current understanding of quantum entanglement. What this means is that distance itself (among other things) is possibly only our perception being warped (stretched) by the fabric of space time. Think of space time as having a resistance or viscosity that slows the speed of light so that the further away the object the slower light traveled to get here.

  28. I think the concept of generational ships is bogus. much easier and economical to put crew In deep sleep and low metabolism. especially with some fraction of time dilation. problem solved.

  29. Only getting images of Proxima Centauri… well, dropping all my plans, research and studies. Next up, cryogenic preservation and immortality

  30. I mean, given all of the people that agreed to go on a one way trip to mars, I assume that there would be people willing to sign up on a generation ship.

  31. Faster ship gets there and colonizes planet.

    Slower ship gets there: N A H C H I E F.


  32. Couldn’t the second ship from the future stop and pick the people up already heading towards the star? Then so on and so on as time and technology go on?? That way at least someone would reach a star at some point even if technology stopped .

  33. Even worse, the wait calculation assumes that we don't eventually find some way to circumvent the speed of light barrier. While it's certainly far into the realm of science fiction for now, there are theoretically ways it could be done. And given 19,000 years, I wouldn't be surprised if theory gets turned into reality at some point.

  34. Remember the movie Passengers (2016) with Chris Pratt and Jennifer Lawrence
    ? In that movie it took them a long long time to go to this far away planet from Earth so they froze people's bodies and only woke them up few months before they reached the planet. I know that the movie is just science fiction (and apparently not so good) but if we figure about a way to keep humans and animals frozen like that, it would be like thousands of years had not gone by.

  35. Well, thinking about it, even if the 1000 years later ship makes a detour to pick people up from tree first ship, they probably wouldn't even understand each other, as language would change in that time span. Also, maybe some little mutations would occur and they would be slightly different…. Well, definitely, let's not do it…

  36. Or, quite simply, you don’t send the new colonists in the new ship towards the same planet that you sent the old colonists. Boom!

  37. Couldn’t the Earth with more advanced technology catch up to the 19,000 year voyage to somewhat speed up their voyage to proxima instead of just plain out passing them and making their voyage a waste?

  38. Why is no one talking about time relativity? Wouldn't the people on the ship from this year experience time at a significantly slower rate due to their speed?

  39. Isn’t the bigger problem that a spacecraft couldn’t last 19,000 years… the components would have decomposed by then and they couldn’t possibly take enough replacement parts from Earth to maintain the ship whilst floating through space. Plus what would they do with all their dead? Lol

  40. Lol how will a group of people just "colonize" a planet? What if conditions aren't exactly like those on earth? How will they land? Where will they get enough materials and equipment to build stuff? The conditions on the planet will have to be idyllic, with pleasant weather, edible fruits all over the place and reeds with which they can build huts, no dangerous bacteria and viruses, etc. NO. This will NEVER happen. NEVER.

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