You sir, are responsible for many sleepless nights of "oh just one more video" this is by far one of the greatest channels out there. keep up the great work!

@kinguin7

3 жыл бұрын

Funny, I'm putting this video on to fall asleep to.

@svchineeljunk-riggedschoon4038

3 жыл бұрын

@@kinguin7 I was about to comment the same. Gives me nice thoughts to size off too.

@kinguin7

3 жыл бұрын

@@svchineeljunk-riggedschoon4038 it's interesting stuff, so I won't say it puts me to sleep, but it doesn't keep my up at all and kinda helps clear my thoughts I suppose.

@99jdave99

7 күн бұрын

He’s definitely kept up, awesomely :)

need to stop worrying about people understanding you. you are super intelligent and we are all lucky to have access to the knowledge base you are providing us....

I had never heard of Steppenwolf planets until you mentioned them in a comment on your Gaian Moons video. Very interesting. Watching your videos can be like taking a magic carpet ride.

@azureth7026

7 жыл бұрын

We're playing that in marching band. I got it.

Your optimism is sublime. I think that is what I love most about watching your videos. The music is perfect too.

re: 5:23 When a man loves cats, I am his friend and comrade, without further introduction. Mark Twain

Again, another amazing video. What most videos do seem to boil down to are two things: A) We need sustainable, relatively cool (ie only a few million degees) fusion B) We need incredibly tough building materials. Once we have these two basic concepts mastered the rest is essentially only a question of when, not if, we do it. Please correct me if I am wrong in these assumptions. Keep up the great work. KZread needs a channel like yours to keep intelligent people sane.

I wasn't expecting to get a screen-full of kitten at 5:20... awwww, so cute.

Wow, this channel is exactly what I wanted but didn't know.

@supershenron9162

5 жыл бұрын

That's SFIA's motto lol the channel that's exactly what you want..... you just never knew it lmao. that and or welcome to SFIA where we always have a point but it may take us an hour to get to it.

I just discovered your Channel today. Neat. You are very clear and easy to understand (I doubt I'd even notice your 'speech impediment' if you didn't mention it every video I've seen so far) and informative, and your illustrations/video aides very well thought out. I'm now going to binge watch and 'like' every video you've made so far for the next few days! :-) Please keep up the good work.

@isaacarthurSFIA

7 жыл бұрын

Glad you're enjoying them Jason! Welcome to the channel

@naponroy

7 жыл бұрын

Hi Isaac, this reminded me about a Sci-Fi short I read from the early 50s. It's A Pail of Air by Fritz Leiber, basically Earth is jerked out of orbit by a passing black hole or rogue star and becomes a Rogue planet with the last few humans clinging to life, bringing a Pail of Air into the habitat to let it thaw to breathe. It's easy enough to find online and only small, check ti out if you haven't, since you seem to like Sci-Fi as a fiction genre.

@ralphbougher62

7 жыл бұрын

naponroy I read that too! About 1970ish. Very good read as I remember.

@colinp2238

6 жыл бұрын

naponroy That is similar to the 1970's Gerry Anderson TV series Space 1999 but it's the Moon that is ejected into space following a huge atomic blast on the Moon.

@dallassukerkin6878

6 жыл бұрын

Whilst I would concur that it is not usually good to patronize someone, because that can often denote insincerity, reassuring someone that their approach impediment does not detract at all from their creative output is indicative of kindly intent.

I noticed in many of your videos you make comments about your voice. I havnt no problem understanding you. Ignore people who give you a hard time. Great channel, really enjoy listening while in the office. Thanks for the good work!

One of my favorite mind games is to find the rogue planet in the middle of the largest intergalactic void, in other words, the most distant object from anything else in the observable universe, then try to determine what the sky would look like from its surface. The largest voids are, what, a half billion or so light years across? So you'd need, what, a James Webb telescope just to see the nearest galaxies? Or could you see the detailed structure of filaments from there? Oh well, lemme get back to work on my Mark 4 intergalactic beaming device, coming along very nicely.

Panspermia is not a form of abiogenesis, it merely describes how already existing life could be transported from planet to planet, it doesn't address how life itself could begin.

@1MarkKeller

7 жыл бұрын

pan·sper·mi·a panˈspərmēə/ noun the theory that life on the earth originated from microorganisms or *chemical precursors of life* present in outer space and able to initiate life on reaching a suitable environment.

@francoislacombe9071

7 жыл бұрын

Mark Keller Well, it's still not abiogenesis, it just provides one more potential source for life's building blocks, it doesn't address the process through which those building blocks assembled themselves into the first living organisms.

@1MarkKeller

7 жыл бұрын

Abiogenesis is another way of saying spontaneous generation. So the "building blocks" and time may be just enough ... the Universe is full of both of those ingredients.

@isaacarthurSFIA

7 жыл бұрын

Yes Francois but neither do tidal pools or thermal events, I get your point about it being location not process, but we don't know the process beyond generalities and as a result abiogenesis is still mostly about determining the location where the right sort of factors should tend to exist.

@scientistsbaffled5730

7 жыл бұрын

Mark Keller but oddly not full of life, could be we are a one off.

Hi! I recently found your channel, and I'm enjoying every minute of going through your older videos. Thanks for all the hard work!

Lurking for untold aeons in the dark watery depths between the stars never sounded so much fun. :)

Just found these videos and have already binged them. Now re-watching my favourites. I love them. Hoping for many more.

@isaacarthurSFIA

8 жыл бұрын

+Mike Fleming Gald you're enjoying them Mike, I expect to continue producing them indefinitely.

Hi Isaac, thoroughly enjoying you vids. Keep up the good work. :)

@isaacarthurSFIA

8 жыл бұрын

+Barry Mcdougall Thanks Barry, will do.

our very own milky way in the depth of the sea... what an incredible channel

Isaac, I must say that I watched alot of videos here on youtube from tv station like history channel and such but you bring us more information in a grown up format without needing to "cater" to your audience. I hope you do know what I mean, to be all moving with hands, sounding cool and such. Please keep this up and make more of those vids, liked it. Looking greatly forward to the next one.

@isaacarthurSFIA

8 жыл бұрын

+ShinForgotPassxXx Plenty more vids to come for the foreseeable future, it's a fun hobby still. Glad you're enjoying them, and yeah I suspect I know what you mean, many popular examples come to mind.

@ShinForgotPassxXx

8 жыл бұрын

+Isaac Arthur I know it is a strange request but would you consider a facecam in the corner of the videos in the future? It would feel like you narrate it to students somehow hahaha. Besides, I have been reading comments and I like how you take your time to answer questions. Once the Channel gets bigger this will be tougher.

@isaacarthurSFIA

8 жыл бұрын

+ShinForgotPassxXx Probably not as a regular thing, I do a lot of takes, rarely more than a paragraph at a time then pause and sip some tea, so my head would blur around every few sentences. If the channel gets a lot bigger I might kill two birds with one stone at some point and green-screen or PiP myself into a FAQ for regular questions.

While improving the life-supporting capacity of a planet is a worthy project (and putting lights in the deep ocean to support islands of photosynthesis is very poetic), I suspect humans wouldn't want to live on the bottom of a superthick hydrogen atmosphere. Live in space, using the planet for resources.

@isaacarthurSFIA

8 жыл бұрын

+Robert Miller Yeah probably not, it's really more mind fuel for writers, either as the super aquarium or the deep dark depths where Cthulu's angry uncle dwells. Of course a Steppenwolf can pretty much provide the resources to keep untold billions in comfort for astronomical timelines so it wouldn't be too surprising if the planet had a swarm of habitats orbiting it holding a trillion people and a billion or so of those lived planetside or it was a tourist trap.

@andrejones3355

6 жыл бұрын

*Isaac Arthur FIRST OF ALL SIR YOU NEED TO GET THAT FUCKED UP SPEECH INPEDEMENT FIXED YOU SOUND STRONG AND ATHURITIVE IN THE BEGGINING THEN YOU START SOUNDING LIKE YOU ARE TRYING TO SAY TAFFY TUCK ... TRAAVL 🤔SPACE TRAAAVL MAURS FUCKED UP SIR😣*

@schwubs

6 жыл бұрын

Andre Jones You need to go back to grade school and learn spelling and grammar.

@rufust.firefly2474

6 жыл бұрын

Andre Jones yeah she really sucked at English 1A!

@andrejones3355

6 жыл бұрын

*JRyan Stryker DON'T SHE?*

I really enjoy the depth of research you put into your videos, thoroughly exploring the issues in a very thought-provoking way.

I've got this channel on autoplay. I love going back to older videos to rewatch. I always get something new out of it.

Always happy to see another video from you!

Isaac Arthur youre amazing keep everything up. Ive never found a channel so in tune with what I want in detail and scope, and your subscriber per view per video shows that everyone loves your work. Keep everything up and dont worry about your impediment it makes you you.

Excellent channel, love your videos Isaac! Keep them coming!

The familiar music of this channel, and Isaac Arthur's voice, feels like home!

And about your speech impediment, just don't worry about it dude. Your content is so good even if you talked like a banshee it'll still be worth it. I love this channel. Keep it up

Great video as always

More more more. I love your channel.

great video! Also great visual accompaniment

Mr. Arthur, I love your videos. As far as your speech, I can understand you just fine. Not to mention you have a very soothing voice.

I think lighting up the deep ocean of rogue planets might not be the most practical way to colonize such a world, but at that point in time when we seriously consider colonizing interstellar space, I would expect that we don't *need* to always use the most practical route possible. Who knows, maybe at that time we can already think in geological timespans and purposefully change around the environments on these worlds to enable native life to evolve into more complex, robust and flourishing ecosystems. Enabling life on distant worlds, regardless of practicality, might be considered a worthwhile goal on its own. At least that would be a pretty optimistic outlook!

great piece of work, thank you

Hearing about the huge number of rogue planets and asteroids in inter-stellar space...mind blown!

Awesome new video!

An excellent conclusion to the Habitable Planets four part mini-series! Well done! :)

Really awesome to imagine myself on one of these crazy planets as u describe them.. those rocheworlds are super interesting too!! thanks for this!

Great video.

I like the random pictures of cats in your videos.

You're so far beyond me in regards to your math, but I love your presentations. I'm hooked. Also, I really enjoy the way you speak. It's hypnotic. Closed captions are for the dregs.

Loving the videos

Your videos are awesome

9:20 the ocean floor just blinked at me. THE OCEAN FLOOR JUST BLINKED AT ME! Seriously, that is freaky looking. Um...hi...creature... (Looking at it again, that seems more like a breathing mechanism, but...GAH!)

Issac, we love you MAN!!

much respect m8. Excellent vids, Very imformative.

@isaacarthurSFIA

8 жыл бұрын

+David Snowball Glad you enjoyed it David

Thank you for the Rogue planets series. I'm writing a SF story that has living Rogue planets traveling through interstellar and intergalactic space. The planet is 2x larger than earth; but has more land than ocean.

I thoroughly enjoyed this video. I am pretty sure you understand that there are also likely planets between the galaxies as well.

I remember an interesting take on this from the early days of sci-fi. Look up "A Pail of Air". X-1 did a radio version back in the fifties.

Ive watched a lot of your videos mostly the newer ones working my way backwards and have no problem understanding you. though, it did cause me to look up Rhotacism and some other things.

I find your videos extremely intriguing. So many aspects put forth in such a way. I really enjoy how you lightly put terraforming planets and systems as acceptable for progress which I have always felt is the only way we will ever capture the future we read in books(distant future). The times may change but to be an explorer at any time, past or future, will always demand vast resources. Resources do not give themselves up easily. And more than likely whatever we find will be of no use to us without altering. I guess if we seriously contemplate the extreme distant future dismantling and altering entire planets and systems may be more akin to replanting your garden.

Before I watched this video, I didn't even know that Steppenwolf planets were a thing. Now they might be my favourite thing. So... Thank you!

The author gives coral reefs as an example of "abundant life", which is false. Coral reefs has many species, but they produce little biomass compared to that produced by plants. At the base of the coral ecosystem are unicellular organism living in symbiosis with the coral polyps. The density of the photosyntethysing cells is not so great, and they have to give off some of the harvested energy right away to the coral polyps, which supports them with nutrition, and only then come the bigger animals. If a single organism can dominate the others in this ecosystem, it will eventually kill all the corals, and then die, this is happening at the Great Coral Reef near the Australian shores, where non-indigenous starfish kill off the whole thing. If stable conditions are created for life, if anything, an algae bloom is expected, so murky-green water, the closer to the light source, the murkier, with very few, or only 1 species, which is the best adapted for that environment, and then layers of other organisms around it, which feed off of it, depending on the energy output, maybe only herbivores, maybe a few layers of carnivores. So, what is expected, is the polar opposite of a coral reef: a very few species, and high production of biomass in a little sphere around the energy source.

I love the channel and hope it keeps expanding. Pluto lost it's planetary status over the definition of "planet" so by the same standard wouldn't rogue "planets" lose that label as well?

@thefinestsake1660

2 жыл бұрын

I think it's considered a dwarf planet by the latest definitions. Then again, so are a lot of moons. One of those "most moons are planets, but not all planets are moons" Not sure. It'll probably change again

Wow dude your audio quality has come so far

I can understand you perfectly and English is my second language. Great video!

I love your videos

Great video as always :) love the detailed responses you post, don't usually see that on youtube.

@5000mahmud

8 жыл бұрын

+5000mahmud Also, love that deep ocean lights concept, i always imagine that future humans will make earth a MUCH more bio-diverse place, filled to the brim with life in every environment.

@isaacarthurSFIA

8 жыл бұрын

+5000mahmud Yes, long term it will probably be better and easier to move our biodiversity off-planet, rotating habitats as safely controlled wildlife preserves, but there's always been something kind of appealing to me about adding a more 3D component to our biosphere, or adding some oasis to various weaker ecosystems just to see what happens to them when you open the throttle a bit wider, pools in desert, hot springs in tundra, light in the depths, etc. Of course not being a biologist I don't know if that's actually a good idea or not, but it's an interesting one at least.

@5000mahmud

8 жыл бұрын

Isaac Arthur I agree, and personally, i believe its humanities duty to maximize life wherever it is found.

@isaacarthurSFIA

8 жыл бұрын

+5000mahmud Well said.

I think that maybe these planeta could be used as rich-producing scientific bases to explore and study more life on these conditions, even if life hadn't thrived already. Other use could be as a mobile industrial planet to produce millions of spaceships to colonize other star systems as the rogue planet approaches them. it would like a society of people born with that purpose, interesting.

If we put tidal pools at the top of that list we can make it a great filter, because of the size of our moon.

I loved this video and found it very thought provoking, apart from the abiogenesis section. You should realize that for life to occur without intelligent interference the odds lie somewhere between impossible and no chance in hell. For it to stand even the smallest chance of happening it would require a lot more time than this universe has allowed. In fact the last stars would have become cold dead lumps for many trillions of years by the time it would have become even remotely possible.

Hi Isaac, great video and fantastic production as you are known to do! Did you ever do TEDx?

Steppenwolf "But the band is easier to remember" LOL!

A possible issue with the vertical coral reefs would be that calcium does not precipitate as easily in the deep ocean especially if you increase the amount of life using it.

5:24 ... good. Every decent person likes cats. ;P

@isaacarthurSFIA

7 жыл бұрын

:) Such has been my experience too

@pineapplepenumbra

7 жыл бұрын

I'm always suspicious of people who don't like cats.

@ValaAssistant

7 жыл бұрын

All life must worship cats! for they are the cuteness gods who have made everything!

@SmithdoesMinecraft

6 жыл бұрын

What about people neutral/allergic to them? I think I am slightly allergic although never tested. I get sneezy at my friend's house and my eyes hurt. Although it could be a placebo/nocebo type thing. My dad has an allergy to them, so I may too. Because of my dad's allergy, I have never had a cat and thus I am neutral to them. Am I indecent?

@BattleBunny1979

6 жыл бұрын

im allergic so I dont like them.

Really really interesting, keep up with it! And by the way, I can understand perfectly what you say, even if I'm not a native english speaker. Subscribed and following.

@isaacarthurSFIA

7 жыл бұрын

Thanks Marc and welcome to the channel!

haha I just noticed the flag says "get your ass to mars"

Great video, have you ever played that computer game 'surviving mars'? it utilities many of the more mainstream ideas you talk about. Very interesting game as a thought experiment of the difficulties of colonizing another planet and fun too. The only quibble I have is that your initial source water comes from moisture vaporators sucking moisture from the atmosphere, but as far as I know the martian atmosphere is virtually non existent due to a lack of a magnetic field as you mentioned and contains no water

If I was the lone maintenance tech at an asteroid mining facility, which was in between crew rotations, I'd surely be watching your channel...not for the hindsight perspective, to see how accurate your information was, but to forward video clips to my bosses, to show them how THEY screwed up. For instance, if I'm to be alone out here for weeks or months in between crews, then where's my star trek holo-deck???

Wow, what a spaceship! Hijack a rogue planet and see where it takes you. You have the tech and all the resources you need to florish on the trip to somewhere. The culture that colonizes worlds from there would be so strange and alien after so many generations.

bravo!

I just want to say I love your videos I can just listen to them at work and drown out all the noise. Do you have a release schedule for your videos, or is it just done when it's done?

@isaacarthurSFIA

8 жыл бұрын

+jesse moore Glad you're enjoying them, there's no schedule at the moment beyond me being pretty fixated on releasing at least one a month, probably in the not too distant future I'll settle into a pattern and get a schedule, but truth be told the channel's really only six months old as an actual channel, before that there were just a few videos created and released on whim, so it's still fairly in beta-testing as it were.

Thanks for the great content! I just finished watching habitable worlds part 1 as per your recommendation. By the way are subtitles working on this one? All I see are the youtube auto-generated ones, which are even worse than no subtitles. Keep up the great work and thanks!

@isaacarthurSFIA

8 жыл бұрын

+friedporkrice Oops, forget to hit the 'publish' button the subtitles. Nice catch, thanks, I caught about thirty seconds of the 'auto-generated' ones and it looked like the worst of the Texting Autocorrect fails.

Yah me too! wow fantastic

"Jooles", not "jowls", for Joules. French diphthongs are a bugger! Very nice overview. I had no idea they were so interesting.

How does this change our assumptions on alien life? I do still think life around other stars would be vastly more common, but just imagine if sentient life evolved on a rogue planet devoid of sunlight.. They would probably have no visual senses what so ever, or if they did very very sensitive ones. Imagine the scene from Sunshine when the nutter lets himself be washed over with the power of the sun as they approach closer, that's how they would feel just being out by Jupiter's orbit, the sun would be so overpowering to their senses. 1. This would make it even more likely that such a civilization would choose to use robotic drones to explore solar systems than going there in "flesh", as they would be so sensitive to the incredible radiative power of such close proximity to a star, that they have never before experienced in their entire billion-years of evolution. 2. It would also make it likely to encounter truly unpredictable civilizations that function in unimaginable ways. We always assume an alien always has a visual sense, or somehow values light or understands the difference of light and shadow. Naturally they would still see the night sky with stars (far more clearly than we ever could, unless their atmosphere was too thick). But its still something to think about. Once you add rogue planets into the mix of serious contemplation, your assumptions on alien life falls flat on its face, there are so many possibilities out there, we cannot assume anything. Imagine a pre-FTL civilization on such a world that has just managed to send a probe to orbit their planet, big steps, small steps. They might have some observatories trained on nearby stars, measuring the light, imagining their power. But in actual first-hand experience. They would be utterly shocked to their very core upon setting foot on a planet such as Earth during midday. It would be such intense trauma for both their senses, and feeling the radiation on their "skin". Like the scene in Sunshine but perpetual and never stopping. Meanwhile we trodd along merrily without any issues, wondering why this alien is freaking out on the ground shaking in terror during what we consider a beautiful sunny day. Perhaps somewhere out there, there are lifeforms around pulsars or superluminous variable stars billions of times brighter than our sun, contemplating how limited in experience WE are around our mediocre dim little dwarf star.. Just as we contemplate the rogue planets. Just imagine, any civilization, no matter how intelligent and wise, evolved around such a planet would naturally assume that THOSE are the most suitable places for life, far away from deadly radiation-fountains that are stars, they would have a basic understanding that radiation breaks apart DNA (if they have dna), thus they would conclude that life around stars would be inconcievably hostile, most likely impossible. They would have no basis for comprehending how such life could evolve. Perspective. It is all about perspective. We look upon the universe from a human perspective, and attribute all our experiences to judge what is and isnt possible out there. We have so much more to learn.

great video. just came across your channel. good stuff...👍

I'm wondering about your source for the number of rogue planets @11:45 ish (100k / star). With the Kepler and other programs discovering more exo-planets, do you think that estimate would rise or fall? My gut says it would be about the same, but I thought I'd express my reasoning, regardless of the source date. For example, if the 100k number was arrived at due to the amount of planets estimated to form during the formation of a star, and the star's size, and how much matter collapses back into the new system due to collisions or unstable initial orbits. Subtracting even an unreasonably generous average of planets which remain within the system (say, 20) would not have any impact on the 100k estimate. On the other hand, I would not be at all surprised if as more data is collected by exoplanet programs new information is discovered which does change that 100k estimate by a great deal for other reasons. For example, so many stars it seems have super-Jupiters in close orbit, likely using up a lot of that planet-potential mass which was not ejected from those systems.

@isaacarthurSFIA

8 жыл бұрын

+Auxf5 Google 'nomad planets KIPAC' and you'll get some articles on the 100k value, the actual article was in early 2012 in the MM of the Royal Astronomical Society and isn't terribly accessible. It really won't vary much with the Kepler data since they already had a lot of that. But the estimates are always guesses off observations, we don't really know how much metallic matter gets blown out by supernova with anything approaching precision yet because it varies based on mass and composition of those, plus a lot of it would end up inside new stars or ejected into deep space. The variance is too high to tell us anything we can't get better by observation and extrapolated guess-timates, but more and more its looking like there's considerably higher amounts of rocky matter out in the void than in solar systems. I wouldn't say Super-Jupiters are normal, we actually think most of them are outside of solar systems and might seriously outnumber stars, but they're not the norm for solar systems, they're just way easier to spot. It's sort of like our stellar classification system, almost every star we can see with the naked eye is much brighter than our sun, so it's a 'dwarf'. A dwarf that's more massive than 95% of all stars, whereas stars big enough to Supernova are like one in a million but made up a big share of early visible stars, same thing with Super-Jupiters. We'll know the occurrence of Super Jupiters near stars with high precision long before we even have better than an order of magnitude guess about the rate of Earth-mass planets in habitable zones.

@Auxf5

8 жыл бұрын

+Isaac Arthur Fascinating! Reading news.stanford.edu/news/2012/february/slac-nomad-planets-022312.html and the Kavli Foundation home-page, they found that number with good old-fashioned statistics and recent (enough, as you say) data. It's also specific to the Milky Way, which is a detail tempting me to find the papers directly. That is, the total gravity, mass available and used, and "How the rest is likely divided up". They're planning simulations, but I'm guessing that will wait for confirmation by observations, which they say will be possible in the early 2020's - though I'm guessing they've privately worked already on much of the simulation development, and don't want to spend money running anything without those observations. So far as scientific hypothesis go, I'd say that this is one of the richest, and broadest available for pure speculation and fiction that I've encountered in a while. For example, if one were creatively comparing several diverse imaginary nomad planets, the final theory won't throw them out the window - even if the final (2020's) numbers are off by an order of magnitude or two (to use the earlier example, due to more or fewer of them being super Jupiters, or maybe there's just a lot more dust instead), the work would stand up! No doubt there are a lot of great ideas for hard science fiction in space that can't be told in a large-structures or generational-ship setting, but it seems there are infinite more possibilities (as is generally the case). I hope that many "Pure Sci-fi" readers and writers dig in to the subject, starting with your video. Thanks for the reply, I really love your channel!

@isaacarthurSFIA

8 жыл бұрын

+Auxf5 It is definitely a potentially rich area for sci-fi I'd love to see dipped into more, most prior examples tend to involve 'Planet X' or Nemesis style stuff. But I'll just be happy if 'stuff other than normal planets' every breaks into regular SF and not just hard SF. I understand it for TV, sets are expensive so alien planets all look Agua Dulce or Canadian Forests, but we've got good CGI these days for films and books don't have special effects budgets, except for author creativity and research... and laziness :)

So I know this guy his name is Isaac something … Author That’s it Isaac Author and I bet he could figure out how to capture these feral worlds and place them into a star system, making them happy, habitable, domesticated worlds. I’m sure it will involve stellar fusion and black hole generators and giant planets with lots of gas. But if anyone can cowboy up and lasso these worlds he can. My man Isaac Author.

Well this type of world doesn't break the Fermri paradox.* Steppenwolf planets don't have a way of making animals that can use tools, and thereby go up the tech tree. *It breaks the Fermi paradox in a different way. Rogue planets, if another alien species is around, and likely to colonize, would colonize rogue planets. Since we don't see this, this means the Fermi paradox is still unsolved.

What is the song name from the beginning? Fantastic content good sir.

@isaacarthurSFIA

7 жыл бұрын

Dexter Britain's "Seeing the Future", but all music is always listed in the credits at the end of the videos.

I like the idea of using rogue planets to act as slow colony shops

Yeah but if you manage colonization of a rogue planet, how would you plot future trips to and from the planet? The location would change drastically all the time

Is it likely that our solar system and sun be ejected during the merging of the Milky Way and Andromeda Galaxies? It is something I think about every now and then and since everyone else was asking questions....

@isaacarthurSFIA

8 жыл бұрын

+Daniel Thomas Decently improbable but I couldn't put a number on it, not super improbable and many systems will be tossed out of their regular paths or even ejected extragalactically by the merger. The solar systems themselves should be less effected, to perturb an orbit seriously you almost have to cross through it directly.

We could use the resources from the rogue planets as supply depots between stars Interstellar ships wouldn't even need to slow down. Supplies could be fired off the surface at the right time and ships could snag the supplies as they pass.

@isaacarthurSFIA

7 жыл бұрын

Sure, we discussed some similar approaches in the Interstellar Colonization and Interstellar Highway episodes.

have been watching your videos.very enjoyable.i think we,humans,travelling through space,need to look at converting submarine technology to our needs.the two seem to go hand in hand.

@isaacarthurSFIA

7 жыл бұрын

Thanks Kevin, and yes there are some noticeable overlaps.

Rogue Planets can have life which means it has some creatures such as Sinkers, Floaters and Hunters like Carl Sagan said

They seem like a great place to icefish.

I wonder if you could use extremely sensitive thermal imaging telescopes of the future to find rogue planets by the tiny amount of heat they would give off. They'd have to be at least a little bit warmer than the space around them.

"nothing to do with the subject I just like cats" almost sprayed my monitor with coke laughing hahaah

I agree that life could evolve just as easily on a rogue planet as Europa, but Titan is a different kettle of fish. Even just accounting for the photolytically produced hydrogen disappearing into its surface, its ecosystem would have at least 10,00 times the power of a hypothetical one on Europa. Worse still for such equations, the smog filters out almost all uv light, but allows around half the red through to the surface. This allows photosynthesis, and if we cover Titan in plants of sugarcane efficiency, it could be several percent as active, per surface area, as Earth!

Do we have any idea how common rogue planets are? They seem really hard to find, their surfaces being so cold and dim in the infrared, the only reason we find brown dwarves is the residual heat from gravitational collapse and that's only the comparatively newly born ones.

I suppose mega earths would be better then regular earth for life? Since more heat from core and underwater life wont be as affected by higher gravity.

Isaac, are you aware of Sarah Segar who works for NASA and her assertion that a hydrogen atmosphere could insulate a more or less earth sized planet enough to allow liquid water and dry land on the surface? Even in interstellar space...

@isaacarthurSFIA

6 жыл бұрын

Yes, I tend to keep up on her work on exoplanets.

Is there wind on rogue planets?

One thing I find interesting is our uncertainty about the quantity of rogue planets like Steppenwolf planets seems to range several orders of magnitude. If it turns out they exist in the upper bounds of this uncertainty, are these not essentially MACHOs, and would that still not be enough to explain dark matter?

Panspermia doesn't really explain abiogenesis IMO. It's the equivalent of punting - you kick the abiogenenesis football somewhere else on the field of discussion. :-) Wherever it lands, the rules of the game are the same.

im curious if you had an earth-ish or double earth sized planet orbiting a much more massive planet out in "the void", could plant life evolve to feed off of its infrared red light? Or would that be beyond the possibilities of "photo ...thermal-?"synthesis? I'm working on a slightly sci-fi based story but I'm very rigidly trying to stick to hard science everywhere I can (no ftl or much tech we don't already have etc). I've managed to get pretty much everything else figured out through many of your other videos and some serious math lol. So if I get an answer by you or anyone else to this question I'd be very grateful, but if not I'll totally understand since I'm sure you're probably bombarded by dorks like me constantly already lol -thank you very much =)

depending on what propulsion system one is using rogue planets could be a significant navigation hazard

Woah dude.

cool

Radioactive decay alone is not enough to account for Earth's heat energy. Primordial heat is a big source of energy and it can last for billions of years. Also, if earth becomes a rogue planet the tectonic and volcanic activity may disrupt the ice crust and pump heat in the atmosphere. About the idea in the end, introducing non-native species on a new habitat usually have negative effect on the local ecosystem. We did it in New Zealand, Patagonia Argentina, Fernando de Noronha in Brazil and many other places.

@Sara3346

7 жыл бұрын

He's talking about introducing shallow marine life, I beleive, marine eccosystems don't work like terrestrial ones, shallow water species die if introduced into high pressure zones.

@EnricoDias

7 жыл бұрын

They may carry bacteria capable of surviving in high pressure.

@Sara3346

7 жыл бұрын

Baro tolerant bacteria are much more rare than obligate barophiles which die at low pressure, so as long as one isn't shipping in seawater fresh from earth that's not even a risk.

@isaacarthurSFIA

7 жыл бұрын

Not just shallow life, it would depend on circumstances and we look at that a couple episodes later in the WaterWorlds vid, but keep in mind a rogue planet as massive than Earth will have lower gravity from lower density, and many rogue planets, indeed most, will be less massive than Earth. If for instance you picked some place where you wanted to maintain the ice 100 meters thick on a place with half earth gravity and built a dome right into that with a fusion reactor on top, you could replace that volume of ice under the dome with air and drop chains of light down you could get a fairly large normal terrestial bathypelagic zone there. If there was existing high-pressure life you could intentionally not include ours and segregate the two life types.