Life on Giant Moons
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- Äas pĆidĂĄn 19. 04. 2023
- We often contemplate life on alien planets, but might giant moons orbiting distant immense worlds be a better candidate for where extraterrestrial life might be found?
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Credits:
Life on Giant Moons
Episode 391, April 20, 2023
Written, Produced & Narrated by:
Isaac Arthur
Editors:
Anne Kristoffersen
Briana Brownell
David McFarlane
Graphics by:
Jeremy Jozwik
Ken York
Tristan3D
Music Courtesy of
Lombus, "Cosmic Soup"
Markus Junnikkala, "We Roam the Stars"
Stellardrone, "Red Giant"
Miguel Johsnon, "Far From Home", "So Many Stars"
Aerium, "Fifth Star of Aldebaran"ifth Star of Aldebaran" - VÄda a technologie
On a distant moon, a science fiction author writes a story of a crazy alien civilisation that somehow formed on a planet.
Say what we will about the Ewoks, they were the most tactically advanced fighting force in canonical SW, embracing multi-domain operations, synchronizing direct and indirect fire, combat engineer principles, deception, psychological operations and massing their forces at the key points in time and space. (This, of course, is an excerpt from the Angry Staff Officerâs blog, a fellow National Guard staff officer)
Can you imagine being one of those sailors seeing the planet for the first time? How mind blowing an experience that would be? Holy shit. I'm getting so much second hand wonder and awe just from imagining their reactions. They'd think it was some strange mountain at first.
A mountain so large, there are coroilis storms on it!!
That would entirely depend just how the land masses of the planet are aligned, if that was anything new. Though it is very much something that regardless messes with early mysticism.
Wow... The idea of a civilization arising on a tidally locked moon, one the side away from the planet, and thus never knowing that they were even ON a moon until their age of exploration is super compelling... (Kinda like the example of a planet tidally locked to it's sun, and having only a small habitable band, and never being able to see the stars from their constant twilight...).
That seems like a fantastic premi for a sci-fi story... Somebody's gotta write that! (Another great SFIA idea!
Isaac: I hated the Ewoks
Me: I always wanted to see an Ewok sith. Not a sith lord, but one kept like a hunting dog. An ambush predator, using the dark side to conceal his presence and force leaps and lightsaber throws to hunt the actual sith lord's enemies. A frightful horrible cannibalistic little thing.
:) Maybe that's was what Palpatine was there for, to Darkside the place while construction completed so he could have a legion of vicious little ewok ninjas
Last time I was here this early, I thought moons were moon sized.
Then I found they can be space stationed sized.
Then super-moon sized.
And everything inbetween.
Moons are anything "organic" with a suspended orbit around a planet
Our own moon is nearby "planet size" and only around a third smaller then for example mercury while other moons in the solarsystem are significantly smaller. There is nothing like "moon size". Ganymede is even bigger then Mercury, but since it orbits Jupiter it's also called a moon.
The Cool Worlds team may have found a mini Neptune sized moon around a gas giant, although they need more telescope time from somewhere in order to study it more, and if i recall correctly the next time the planet will be in view will be next year so it'll still be some time til they have a satisfactory answer.
Moons! What a great plan. I love dreaming with this channel!
For the first time ever, I will be forced to watch something else before this. Starship 24/7 launches in 27 minutes!
It did pretty well. I would have never guessed you could flip a rocket without wrecking it instantly.
@@jamesfowley4114 it did got wrecked but not as planed tho but it where a spectacular flight anyway.
@@jamesfowley4114 that rocketâs mama was a flag girl in high school marching band
Donât bother. It blows up
That's no moon . . . it's a SFIA episode.
I understood that reference ^^
It's an old reference, but it checks out.
I do love to imagine an alternate alien world with their own version of Isaac Arthur looking up at the stars and pondering the life that could be out there.
Isaac your optimism and imagination are truly captivating and inspiring. When I first found this channel I would stay up late into the night listening to your episodes on megastructures and it kind of helped me get through university dreaming of a bigger and brighter future.
You really have encouraged a new generation of dreamers in a way I think few have and I am so grateful to have found your content.
Live long and prosper đđ»
Starship just completed its first launch test and it succeeded with its first goal of Launching truly
Poggers
It got through max-Q as well.
My favorite thing would be to live on a moon orbiting a gas giant. That'd make for such a beautiful sky
Same!!!
What about the radiation problem? Could we assume that any gas giant would have a radiation belt? If so the proposed moon would need to be far enough away (Like Callisto) to be safe or perhaps any life there would be more resistant to radiation. The light would come from whatever type star the planet orbited and this could also present problems. Red stars are subject to dangerous flares and large blue or white stars don't last very long and would provide a shorter window for life to evolve.
EXACTLY what I was thinking.
The moon Ganymede actually has its own magnetic field and it is generated in much the same way Earth's magnetic field is. While powerful radiation belts likely would exist (though more due to interactions with the parent star than from volcanism of the moons like with our own Jupiter-Io system), a moon large enough to maintain a dense Earth-like atmosphere would very likely have a magnetic field that would help protect it from radiation like Earth's does.
Radiation is not magic death cuties.
Life on Earth is relatively radiation-resistent already - just look at Chernobyl exclusion zone.
Its not that hard to imagine life evolving to be even more radiation resistant.
These moons are probably more common with life than our strange almost double planet system. It is our system that is rare. This will make it harder to find them though !
@@skipperg4436 The Turians from Mass Effect had some of that issue. They evolved some kind of exoskeleton that wasn't supportive, but protective against harmful radiation of some kind I think.
It doesn't seem unreasonable for creatures to develop some form of radiation armor protection, incorporating water or even some kind of lead or heavy metals into their shells/skin, or just having alot of radioabsorbing pigments.
As always your world-building is superb. I loved your speculative exploration of a space faring civilization arising on a moon, how they develop and how that affects their outlook and preconceptions.
To look at a distant Earth from other eyes.
Another superb episode Isaac.
âDual abomination of Death Star and Ewoksâ.
Not a Star Wars fan, but love it.
In the movie, didn't they refer to it as "The Forest Moon of Endor"?
I always assumed it didn't have a name and was simply "The Forest Moon" of Endor the planet. Same as they didn't bother to give Yavin 4 its own name and named it after the planet with a number tacked on.
Correct
A lot of sci-fi uses X Prime for the star and then numbers for each planet. Though some instead use Prime for the planets and numbers for the moons. Mass Effect was an example of the latter. Star Wars seems to use the former.
I always interpreted "The Forest Moon of Endor" to be like a description of the moon. Like "the dark lands of Mordor".
In which case I guess the planet they're orbiting is Tana-X and the moon gets its own name. Curiously, despite seeing many examples of sci-fi using the Prime/numbers system, either for planets or moons, I can't recall any that address the obvious problem of both. If the system is the star is X and the planets are numbered, how do they label the moons? Is our Moon Sol-3-1? Or maybe they'se use greek letters. Sol-3-Alpha.
@@ASpaceOstrich Where we don't use proper names for stars we use [constellation Greek-letter] and Star TREK (and I think astrophysicists even before exoplanets were found) extends this to [constellation, Greek letter, Roman numeral], for example: Ceti Alpha IV for the fourth planet of the brightest star in the constellation Ceti. I can't swear that I ever heard this construction in Star WARS, but the "Yavin IV" fits the same convention for stars that have names in their own right (in our galaxy, Betelgeuse IX would work) For subsatellites, one could use the outline convention for term papers: Roman numeral, (skip capital letter, we already use that for multi-star systems so we go to) lower case letter, Arabic numeral. Thus a satellite of a moon of a planet of a star in the Alpha Centauri system might be "Alpha Centauri (system, in single star systems this would equate to star name) B (star in a multi-star system), III (planet), b (moon), 2 (satellite of a moon), Alpha Centauri B III b 1. Few systems, I trust, would be complex enough to need the designation R II d 2. Stable natural satellites of moons are probably rare, and multi-star systems less common than single star systems so most designations wouldn't be more complex than "Polaris IV a" or "Orion Gamma III c". Of course, most stars don't have names and most catalogued stars have only a catalog number, I don't know the format of those. At first, we would name the stars of any systems we colonize, I presume, unless they had a constellation-Greek letter name or a proper name from the start, but eventually we would run out of proper names, I fear, before we run out of stars.
Hey Isaac, Iâm not sure youâll see this but when I heard that you were involved in so many things outside of this channel, I was amazed!!
May I ask, how do you focus your energy and time to be able to do so much? Iâm just a student in school for physics right now and I want to involve myself more like you, you are truly one of my heroes! Thanks for so many amazing videos through the years.
@@teleportdinero Welcome to the realm of the humans. What do you think about AI? Arthur, Isaac
That's a tricky one, mostly you need to get in the habit of casually auditing your life as you go for removable or unnecessary wastes of time, distractions, stress, etc though above all else, try to find ways to get two things done at once :) e.g. I prefer cooking from scratch, mostly, so do it at a pace or tempo that let's me take a phone call or conference or ponder an episode, same for the garden or when I'm doing some carpentry. I think it mostly takes practice to do that best but you have to be fairly ruthless about identifying the sorts of personal habits that just burn time or energy to little good.
I can't tell you how much I love this channel. I always used to find myself asking the questions you answer - particularly on colonisation and world-building - and I am so grateful to have found this channel so many years ago. Thank you for making Sci-Fi that little bit more real for me đ
6:37 ... While Saturn's closest orbit takes just 7 hours... - Did you mean Jupiter? / And as far as adapting to longer day/night cycles go... I think Iceland's a prime example that both mammalian and photosynthesizing species can prosper and thrive despite extended periods of darkness and light.
Thank you for this. It's always fascinating yet difficult for me to try and picture life on exomoons. This really helps to paint a much clearer picture of it.
I have been waiting for you to make a video on this topic for so long and you absolutely did not disappoint. Thank you!
Happy Arthursday!!đ
Great episode! I love your videos Isaac. They are a great way to escape and ponder the wonders of the universe. I especially love it when you give examples of things from science fiction books. I'm going to start a list and track down some of the books you've mentioned.
Iâve been wondering for a while - what would it be like to live on the far side of a tidally-locked moon your whole life, and then travel to the near side one day? To see a small, weird hill on the horizon slowly grow taller and taller until it finally detaches from the surface and floats into the sky must be an incredible experience. I can only imagine the myths and explanations early people would come up with for it! And what if the planet had an atmosphere and the moon didnât? What would their âtech treeâ look like? Theyâd probably take a lot longer to develop airplanes, but develop large rockets much faster, right?
I absolutely love the concept of life spawning on the 'moons' of a Brown Dwarf. These big boys get a bad rap imo, 'not big enough' to be stars (despite the capacity for deuterium fusion), but considered as giant planetary objects, they have the capacity to have not just planetary moons, but even gas giant or ice giant moons, and the scale and distances of their planetary system would be far smaller than a full star.
A worldbuilding concept I made involved a binary system, with a large main sequence star and a brown dwarf further out, large enough to possess a dozen or so Earth-sized moons, along with an expanse of rings (or belts, I guess?), smaller moons, and various debris. The moons of this world gain heating (both tidal heating and infrared radiation) from the Brown Dwarf, but also a portion of sunlight from the main sequence star, albeit less then Earth does. And you don't necessarily need photosynthesis for life, it's equally likely that chemosynthesis potentially becomes an option, especially on planets prone to heavy volcanism, or hycean worlds with hydrothermal vents.
Not only would it be easy to colonise every moon around the Dwarf, but it would be possible for life to spread between them via atmospheric ejection of some hardy extremophiles, and it would be possible for vastly different biospheres to form on each moon. Also as a fun fact, if the planets are close enough together, then you can still have effects similar to diurnal tide variation as even though the planets are tidally locked to the dwarf, they may affect neighbouring moons as they pass each other, and if you want to imagine what horrors having an Earth-mass Moon would be on ocean tides, let alone multiple, then lemme tell you, the maths spat out numbers in the hundreds of metres, meaning depending on geography, you could have parts of entire continents periodically flooded at regular intervals. Which is, coincidentally, a huge, huge factor in forming terrestrial life.
I had an idea a while back about a world that was a moon, orbiting a gas giant, which was itself in a stable position between two stars, one a very Sol like star, and one a red giant. The moon in question was in a Lagrange point with the Sol like star, so it ended up with one side always facing day and the other side always facing a very red dusk with a giant red star partially eclipsed in the center by the gas giant, making an 'eye of Sauron' like celestial figure.
I never tried working out the orbital mechanics, and I'm fairly sure it wouldn't work well. The planetary impacts were interesting, though. North/South poles didn't matter much, but the 'Sol-facing' pole was a constant mad windstorm and the 'Eye-facing' pole opposite it was an ice mass. The people had no concept of sleep or times of day, month, seasons, anything. Just 'before' and 'after'.
Exomoons have always been really interesting to me.
And, I live in Fort Worth (not far from Frisco) so now that I found about this I'm stoked about possibly attending the ISDC in five weeks. My wife and my best friend both expressed interest in going.
Definitely swing by and say hi. There's supposed to be over a hundred presentations going on over the three day window and I'm expecting to spend a lot of that time rotating between those and wherever Aggie decides to station the coffee :)
I believe in Moooon supremacy
Me too.
Let us moon the heathens.
This is the kind of moon I'd expect Quark to own, but only out of spite for his cousin Gailia, who of course, owned a small moon.
Thank you Mr. Arthur, for another great presentation!
My only issue is...aren't moons usually a "meteorite magnet" protecting the planet they are orbiting around from various space detritus? :-X
The other way around, honestly. The planet blocks far more of the moon's approach angles, and has a much higher gravity.
Without an atmosphere, every tiny rock that hits, hits. Without a geologic cycle resurfacing the body, every crater made will last until a newer crater covers it.
Our moon is unusually large compared to our planet and it does protect our planet, but it only does such a good job because of how big it is.
i think decently sized moon orbiting gas giant has vastly lower chance of being hit by asteroid than it's host.
our moon has a ton of craters not because it is a meteorite magnet and had more impacts. it's just because it has no atmosphere and no erosion so craters live much longer.
Another great episode. Very thought provoking - and some excellent stuff for me to think about when I'm writing science fiction đ
I just. Love your channel I can't believe I haven't had any updates or reminders when you post I accidently ran into the channel because someone mentioned Issac Asimov at. Any rate your detailed scientific explanations are done in such a way that even lay persons can understand and. The images keep the video interesting.
welcome, I'm glad you found us
Keeping this for later and I have peace to watch it. Happy days Isaac.
My favorite part of today's video is the reference to obscure Star Wars planets from the old expanded universe aka the only SW canon I recognize. Sorry if I've been too controversial, I'll probably get lit up like I'm a proponent of flat earth theory đ
I generally try to pretend every book and film made after Darth Plageuis came out doesn't exist, though a couple of the in-between books were okay and I rather liked Andor, to my surprise.
The only thing that made me happier than the death of the Ewoks was the death of Dobby in Harry Potter.
Pls make a video on super moons.
This channel is awesome btw! Such great ideas and concepts for a an ideal future in the stars!
Your comment on how a civilization might not even know of the existence of the planet they orbit around until the age of sail reminds me of the Quintaglio species, Sapient t rexes that came to worship their planet as the face of God during their renaissance
This is exactly what I needed right now.
Fantastic presentation as always! đ đ
Thanks for another great video!
great episode!
Arthur, your voice is soothing to my cat & me. I think she enjoys SFIA more than I do.
Thank you for the shout out to the Endor apocalypse, which I insist is canon.
Hey Isaac, I just wanted to let you know that your pronunciation of SkaĂ°i was really good. (I hail from Iceland but currently living in Sweden btw)
Hope you see this & thank you for all your hard work. :)
Love you Isaac
It is good that most Star Wars fans at least can agree that the Ewoks were an abomination.
As for life on moons, I wonder how human civilization had looked like if the moon had a breathable atmosphere. With at least some primitive life, lets say brought there by panspermia from Earth at some point in its history. How would that have influenced human culture and development.
A whimsical and as scientifically accurate as possible episode; a joy to listen to and a visual feast for the eye.
I remember a book by Arthur C Clarke (name?) where colonists of Ganymede, whose settlements face Jupiter, need some (or more) psychological help since the Great Red Spot is viewed as a Giant Eye constantly peering down on them.
Moons with a week (or more) day made me think of mimosa?; a small tree whose leaves fold up when touched. I think one name is shy plant. This foils most insects from eating them. It may evolve on moons with a long night. They might also retract the folded leaves into the stems and have protective spines like cacti or spiny acacia. Then living on their sugar reserves like our trees during winters nearer the poles.
As for the anti-Ewok sentiments, frankly Ewok hate, I agree wholeheartedly! Even The Force has a hard time reconciling the fact of their irritating existence!
Some or more animal species may go into torpor (almost but not hibernation) during the long night, like many hummingbirds.
Of course, depending on how much light emits from the planet, plenty of fauna and flora species will just keep on chugging along and not snooze.
Great video. We might have evidence of exomoons, the Cool Worlds channel has talked a great deal about. Another inhabited moon is Andoria the moon of gas giant Andor in Star Trek.
Is that the one that the albino Andorians or such in Enterprise season 4?
Notification gang. Thanks again Issac
As for the extra long days and nights, outer rings of the gas giant, could work for some natural solar mirrors or shades, unlikely to make a earth like lighting but it would smooth out the extremes in light/ dark/ hot/cold. Composition could be aluminum sillica andsodium dust from salt water and volcanic ash being erupted from the moon.
Grenat Channel. Thanks for all your
work.
i reckon once we explore Galimedes, Europa, Titan and other such moons (some of which have a probe planned to visit) we shall know (a little better) how likely it is for planet or moon to have sustanible conditions for life, even if those are provided by gas giant powered tectonic as opposed to atmosphere based shenanigans.
The animation used when discussing tidally locked moons @ 4:00 does not show a tidally locked moon and was scrambling my brain for a minute there... might I suggest adding a note to the video addressing this? Also, keep these great videos coming!
Hey Isaac Iâve been checking out the idea of 24 hour people, like sleepless societies.
Could you maybe explore the implications of âtaking back the nightâ as in what happens when we make a drug which allows people to stop sleeping?
The implications could be very wide reaching, from adding an extra 1/3rd of our day back to us, to changing the way people organize our lives and homes, altering our social and work lives, and even stranger uses like spaceships without a single bed on them, or the lack of dreaming and how it could effect society. Maybe drugs are even developed to provide waking dreams, or allow you to sleep and get a vivid dream.
There could be social stigmas around sleeping. maybe sleep is something that only children do.
It isnât a big topic but it might be enough for a shorter nebula video, something like âtaking back the nightâ or it could fit into a larger video topic like strange changes to society we could see in 100 years.
People could still sleep/dream recreationally, or still require some sleep once a week, or based on how much stress they are undergoing.
The book you're looking for on that subject (among others such as modern genetic engineering and the hazards of 'free energy') is entitled "Beggars in Spain," by Nancy Kress. The follow-up, also worth reading, is entitled "Beggars and Choosers."
Totally agree that this type of human modification is right in SFIA's wheelhouse, and that it would be cool to have @Isaac Arthur take a swing at it. =)
â@@R.Instro thanks for the suggestion! sounds like a solid book, I like the societal conflict covered there.
I do think isaac can tend to only loosely cover societal effects of some of these nearer term technologies, I think he doesn't want to end up offending anyone or touching on controversial territory. However it would be really nice to see him cover the possible societal effects specifically of genetic engineering and such. It's destined to be a controversial subject but like most sci fi it's better to ponder those questions beforehand rather than once pandora's box has been opened.
I loved this episode, is there red faction 1 music in the credits?
LOL, I never had too much problem with the Ewoks, but it would've been more interesting if it had been the Wookiee homeward as I think was the original plan, downsized because they couldn't afford it and couldn't get that many extra-tall actors, supposedly. -- That aside, hmm, whatever the numbers Wookieepedia and Star Wars use, a "real" Endor moon and planet and sun would need, er, scientifically plausible numbers, mass, rotation, etc. So we should probably just hand-wave and say someone at the Imperial / Republic database screwed up the data entry! :D It does seem like a habitable moon should be a possibility, and the idea of it is sure intriguing. -- Isaac, I hope you'll cover the dual / twin planet 9co-planet) idea more in this or a future episode, along with twin / co-moons. (And sub-moon sounds better, although a moo-don sounds like there should be a cow permanently jumping over it, right? :D -- What about Yavin as the moon (habitable) of whatever the planet was, at the end of the first Star Wars movie (er, that Is, ep. IV, a New Hope).
Would it be possible for a habitable moon to either (1) rotate so that all parts (sectors) of the moon (hours) get visible to/from the planet? and/or (2) what about a case where the whole moon does rotate (in regards to what face faces the planet) but very slowly or somewhat slowly, so that eventually the moon and planet see all of each other, but this might not be fast enough that it would be frequent? (days, weeks, months, years?) rather than tidally locked showing only the inner hemisphere and never the outer hemisphere. Or do the mechanics of it preclude this, either case 1 or 2 being impossible?
Should we be disappointed that Isaac did not discuss the running trade in fetching pails of water to and from Jack and Jill, and the difficulties had in going up and down hill to do so, and how those affected their space program and astronauts? Reinforced crowns or heads and tails or landing struts, wheels or the like seem needed.... Also, very sturdy pails.
I love it when Isaac says "this is fouse" (pronounced like "house" with an F).
6:21 still near the beginning of the video and commenting now so i donât forget, but moons might be a better place to find life around red dwarfs because instead of being tidally locked to the star it would be tidally locked to the planet it orbits, thus keeping some sort of day/night cycle
oh and it would also fill some of the role a large moon could have in protecting it from some large asteroids, and do so even better iâd bet
This is epic stuff
Structures around black holes, energy harvesting or transit. Imagine worlds in orbit.
Happy anniversary!
Happy Arthursday everyone. I need a drink and a snack before I take on this day...
I don't understand how a planet can survive supernova without total vaporization. can you further explain or do you have research papers discussed that?
Stars are hot but not really that dense so heat transfer won't be as immediate. And planets are pretty large and durable. Far more so than sci-fi depicts.
If you place earth in a star it would take an entire week to vaporize it but minutes to fry the life off it. Supernova are fast events so not enough time to vaporize it. In fact, there are worlds around neutron stars.
Supernovae aren't infinite energy; a big enough, dense enough planet takes time to boil. If it takes the planet longer to boil away than the supernova lasts, then the planet survives.
Suppose there's a moon similar to the size of the earth orbiting a gas giant at the same distance as Ganemyde orbiting Jupiter. With a sidereal rotation of around 7 earth days (a week), what would the climate patterns look like for such a world? I'm asking coz I suspect that the unequal heating of the world could be more drastic than faster rotating worlds
are habitable moons even possible? They'd have to have a molten core, radiation shield, enough gravity to HOLD an atmosphere, and no interference from their primary body.
Looks like I'm just in time!
Your videos are good, and so's your face:
Take that!
Todd smells
Thank you Issac for expressing what many of us hardcore and more seasoned Si-Fi fans have been thinking for years... " The Ewoks are an ugly stain on an otherwise good Si-Fi movie and film franchise..."
I'm an engineer and even I couldn't keep up with all the numbers you threw at us in this one!
All pretty rad.
Can we get a whole episode on waste heat? From spacecraft to cities to climate, it seems to be a fascinating topic with little public knowledge
GREAT ep, Issac! Especially as I just finished re-reading "Dan Simmons "Endymion" last night.
Liked the Hyperion cantos, a bit scattered in the storytelling & hard to follow - in an intentional nod to Chaucer, I think.
Issac I want to ask how big can a Bioship be and what advantages would it have over a normal ship. I wanted to ask because my story has people who can transform into giant Creatures with healing factors and utilize this in space age to save mass and payload of flight(They transform once they escape).
How are they transforming into giant creatures?
Where are they getting all that mass from? Or do they just become less dense (and thus weaker) as they grow?
@@PerfectAlibi1 Well it is more of a fantasy turned Hard sci-fi and More a show off of How broken breaking the laws of thermodynamics is. You know how Hulk gains mass out of no where and superman flies on mach 10 with just a sandwitch. This stroy is mean to deconstruct the superpower and show how overpowered just a single thing can be.
@@59vibhusharma31
I mean, if you play fast and loose with the laws of physics, you can make them as big as you want XD
@@PerfectAlibi1 Yes I love Hard Sci-Fi But often like to contemplate how broken a fantasy character with scientific method and engineering mindset would be like in Harry Porter ways of rationality.
Once you remove the constraints of reality then it falls upon the author to invent new ones. Failure to have any new laws will result in the story falling apart as it progresses
Great commentary.
If not for anything but to hear you say 'wookiepedia,' in your accent.
What about tides? How strong would the tides be on Jill? With that much mass so close, wouldn't the surface be scoured by high tidal waves each day? While that's great for adding life building minerals to the sea water, what life could take hold on that land?
Thatâs no moon, itâs a moon moon!
That's no moon moon, it's a moon moon moon!
So tell us what you really think about Ewoks...
What is the song playing at 7:21? Itâs a beautiful melody
Fan of habitable moons, but not surprised they're complicated.
Is there an error at about 6:30 about who is orbiting what? Or am I confusing myselfâŠ
The sailors of the tidally locked world could surmise the existence of a large gravitational body using geometry and astronomy, seeing that their horizon and the 'setting' of the star do not match up.
This was about Earth like giant moons, but in the past you have talked about living in the oceans of ice shell moons and worlds. Are you likely to do another episode about colonizing oceans?
If we are considering build some settlements on the extroplanets moons as oceanic civilization, Europa and Ganymede are first step to interstellar journey. Moreover, neighboring galaxies such as Gliese 581 and the other candidate extroplanets are supposed to set settlements due to their habitable environment.
However, if we expanding as oceanic civilization to space, does our earth have start to build underwater cities and transportation system so far? If we didn't build them on the earth, other extroplanets are more complicated than we thought regarding our current development level.
This episode we hate on Ewoks. Great video! Keep em coming!
...which ended the dual abomination of the Empire and the Ewoks...omg f'ing hilarious! đ€Ł
Ganymede is the best chance for a moon colony. Water ,gravity, magnetic shield.
Can you imagine the view any animals evolving on a gian moon would be treated to when looking up (assuming they evolved to see visible light)? They'd likely see a colorful gas planet and the other satellites of that planet. It would be particularly awesome if the planet had Jupiter-like colorful bands and Saturn-like rings!
As for settlement, Earth-like exomoons could be better places for people to live than the so called ''superearths'' are! For starters, the gravity may be more manageable, being closer to Earth strength gravity rather than the gravity of superterrans that average around twice as strong as Earth's gravity. Also, these moons and the planets they orbit would be further from the star than a typical potentially habitable planet. This would be particularly important around red dwarf stars which have this reputation for near-constant stellar flair temper tantrums. And being a natural satellite instead of a planet can increase the reach of the habitable zone, as a moon has the added tidal heating that may make it warm enough for liquid surface water, and make sure any atmosphere doesn't freeze to the ground.
Would you believe i just grabbed a drink and a snack
Great presentation (as usual) and most thought provoking.
10:35 You're remarks about life having trouble surviving with a week-long day confused me. Given that trees and other life are know to survive 5+months of daylight/night are quite common on Earth and have been for hundreds of millions of years why would this be an issue beyond Earth? Many human peoples have thrived in these conditions for some 5000 years.
Perhaps this is a jumping of point for a discussion on "how many years of daylight/darkness could life-as-we-know-it survive?"
V/r
IDKS (I Don't Know S**t)
I came in to hypothesize tidal power beamed to a moon just so I could make a lame "Skadi, we need more power!" reference, and I see a lot of thoughtful discussion. But hey, I'm looong past shame. đ
Alas for us all, Isaac doesn't yub-nub.
A shame given the ewoks mounted the best defense against an aggressor force using "tanks" i have seen in most movies. I dread to think what they would do with all the scraps, supplies, ships, weapons and tech (the survivors) gained access to after the death star 2 rained down upon them (at velocity).
if they could defeat crack imperial formations with logs and stone-club-axes imagine what they could do with electro-staves, shield units, repulsors and heavy-blasters.
moons are the best rocks. Still Team Space Habs for me. If we master Space Habitats, almost every star is worth colonizing. Ideal planets are few and far between... Making the most use of every nearest star should be the goal.
Dammit, Moon Moon! :) đș
Time is really real after it is experienced. You would have to agree to its relativity when coping with the circurmstances of different realities present different places. It's not just the time, but it's the quality of you experience of time. It's not meant to be wonderful everywhere. If you haven't mastered the things which lead to miserable experiences here, where conditions are most comfortable, you'd have even less chance for happiness when being comfortable is not feasible.
I'm convinced we have either a completely unique solar system or it's so ultimately rare we wont find another. If theres a difference.
19:05
This (barycenter criterion) is Not a good choice for determining if something is binary. Changing the density of the primary would change its radius and thus whether the barycenter was inside. Meanwhile if you reduced the solar system to just Jupiter and the Sun, the barycenter would be outside of the sun, despite jupiter being 1000x less massive. A much better criterion, and one of the only non arbitrary ones, is the L4/5 instability boundary at about a 25:1 ratio
What is this moon you call Orth? Isaac? I want to live there. đ
If being human has taught me one thing, it's that humans can go camping anywhere and if you like your camping spot enough, you can turn it into a home.
Our super power is our adaptability.
As much as I sometimes worry our species is a herd of lemmings headed for a cliff, I am strangely comforted by the fact the humans seem to be as resilient as cockroaches or tardigrades.
Indeed. We've got through Super Volcano eruptions, Ice ages, Global sea level rises, population bottlenecks and a few astroid strikes in our short time here. We are a pretty robust spieces (not that we should start getting all hubristic about it of course).
I always thought the Planet was Endor. And the moon was just called "The Forest Moon" and referred to as "of Endor" to differenciate it from Forest Moons of other planets
Correct