Black Holes are NEEDED For Life | Worldbuilding

Episode 4: Worldbuilding Galaxies
In this video we discuss worldbuilding universes and galaxies, giving you the phenomenal cosmic power to worldbuild your own itty-bitty living space.
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WORLDBUILDING CORNER: www.worldbuildingcorner.com
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All music, images, and other media used in this video are available for commercial use with Creative Commons licensing, found on www.pixabay.com and www.pexels.com.

[@toalhademesa2405]

I can almost hear the gears in my brain shift the more I watch your videos

[@WorldbuildingCorner]

Glad the information is understandable and helping!

[@Gregatron13]

Every time I rewatch the series I get more ideas I wanna steal 😝

[@ajkonecny6830]

Same here

[@clairetellkamp6253]

One thing to note, because people think that the fact that light can't escape black holes is super cool, what's even cooler is that TIME ITSELF cannot escape black holes, either.

[@smergthedargon8974]

I believe "active galactic nucleus" refers solely to black holes that are currently in a "heavy-eating" phase, accumulating large accretion discs and producing quasar phenomena.

[@WorldbuildingCorner]

You are correct! This was a distinction I unfortunately learned after making the video, but for reference, yes "active galactic nucleus" refers to the nucleus only of an 'active galaxy'. In the video, the correct terminology is 'Central Massive Object', which I have incorrectly called 'Active Galactic Nucleus'.

[@gabrielalejandrodoldan4722]

​@@WorldbuildingCorner Si no recuerdo mal, tener un núcleo galáctico activo es muy nocivo para la vida orgánica compleja como la conocemos

[@deltainfinium869]

Man I'd love to see an artist make this galaxy. Being elliptical but appearing more like a spiral would be very interesting

[@imperialdragoon9715]

the whole duel universe make me imagine concept of particle supersymmetry and negative mass.

[@WorldbuildingCorner]

There are some really cool supersymmetry and negative mass theories out there! They're a little beyond my expertise, otherwise I'd love to incorporate them into my worldbuilding. Very cool!

[@koe2833]

In my universe, I'm starting it off, not with a big bang, but a big split which forms the three universes which it takes place. As far as I am aware, a big split is not a real thing, so I've wrote it to be like a big rip, but instead of having just the one singularity that causes the end of the universe, there is instead multiple and then this causes the universe to end. Afterwards I have three universes forming from the residual matter left over in a big bang, it's a bit of a stretch to be honest, but I wanted to be unique and then work from it from there. Essentially, the main story takes place in just the one universe, with the other two being the 'higher realms' acting as essentially heaven and hell, I've named them Ambroscus and Barathrum respectively - with Ambroscus acting as the heaven, and Barathrum acting as the hell. I wanted the two higher realms to consist of deity-like being who can have some form of influence on the middle, yet to be named universe, which is where the story mainly takes place. I think of it kind of like Elder Scrolls, where you have the Daedric and Aedric forces who can exert some form of their authority onto earth, with things like daedric artifacts and what not - however instead of it being like Elder Scrolls with Mundus, there is a full universe where the main storyline takes place. I'm starting it off with a fantasy - mediaeval story, however I eventually want to branch into sci-fi as like a sequel to the story, hence why I want a full universe with galaxies for the main theme.

[@LWolf12]

I used a bit of a hybrid method in the creation of mine. The galaxy was created with a big bang, however the planet and people were created used by a creation deity. Though it was only there planet, a the rest of the galaxy formed naturally and largely resembles our own world. Since they ultimately ended up relocating to Earth.

[@kaseyboles30]

I suspect an active supermassive white at a galactic center would disrupt galactic formation.

[@GrandOldDwarf]

It's remarkable how much research you have put into this series

[@alexanderzippel8809]

Learning that Chlorine and Carbon are referred to as metals just wants me to scream into a pillow

[@Ratchet4647]

I'm not sure you've fully considered the repercussions of this severance property. It may make stars dimmer, cooler, it may shift the ratio of supernovae to neutron stars and black holes, it may reduce black body radiation and make fire cooler and dimmer and reduce radioactive heating like in the earth's depths and reduce the greenhouse effect of atmospheres. Habitable planets may have to be closer to their parent stars. This could reduce the efficiency of photosynthesis, and cellular respiration, and other metabolic processes. This may make it so food chains are shorter with fewer trophic levels, and may limit the availability of niches on your world. This could reduce the species richness on your world. Since entropy almost always rises, this property would almost always leech your stars and planets and life of energy. This would be directly proportional to the magnitude of the relationship between entropy and severance. Instances of synthesis may counteract the loss of energy somewhat but severance being tied to entropy means that it leeches energy at every level and makes every process less efficient. Also, the physics of your galaxy around a superlative white hole seems super wonky. I get the sense that as mass enters the area around your white hole the gravitation in that region will increase and increase, progressively tightening the orbits of everything in the galaxy until it all slowly descends into a disc of matter in tight orbit around the white whole.

[@WorldbuildingCorner]

You're definitely correct, there are some pretty significant real-life issues with synthesis and severance, especially concerning stars and habitability. I know this is somewhat of a 'copout' answer, but I do imagine the universe of this series to compensate accordingly. If severance causes 10% loss for example, there is perhaps an equivalent increase in matter/mass to balance things out. Your point about the white hole accumulating matter tightly is not something I had considered though, and is absolutely fair. In an effort to make things make sense, the white holes themselves perhaps have a mechanism that pushes matter away from them, which is not unprecedented, as there is evidence that gravity can in some circumstances be repulsive rather than attractive. I will be honest however that this is a reactionary justification, physics as we know it do dictate that you are likely correct, mass would spew out and tightly cluster around the white hole. I'll say that as fictional constructs in a fictional universe, this is how white holes work, at least in this universe!

[@ewanlee6337]

@@WorldbuildingCorner since blackholes event horizon are when their gravitational attraction is powerful enough to prevent escape and since whiteholes are the opposite of blackholes, their event horizon’s that prevent entry would be a repulsive gravitational force strong enough to reflect even light.

[@LWolf12]

Spiral Galaxies are weird, look like they rotate, but the arms don't move. It's trippy to see.

[@danielnordman4854]

I'm assuming you will get to this in later stages of the world build (haven't watched the whole series yet), but it would have been cool to discuss what effect the structure of the galaxy has on the primitive inhabitants of the world, i.e. the PCs. For example, is the fluctuations of the white whole noticable or have an effect on them?

[@adamjenkins7653]

I have red dwarf's white hole episode playing in my head now thanks

[@boredfangerrude]

It wasn't one big bang but multiple big bangs that created the universe.

[@kalleendo7577]

Awesome!

[@WorldbuildingCorner]

Thank you :)

[@sienielain9222]

Interesting , could a star form inside of the galactic habitable zone and later during billions of years migrate outside of it?

[@WorldbuildingCorner]

Absolutely, there's certainly evidence this happens! A sufficiently massive force, like a supernova, black hole, or even simply a larger star, can alter the positioning of a star within the galaxy, moving it further in or out. As a general rule, the more massive the star (or anything for that matter), the harder it is to move, and the more likely it is to affect the movement of other things.

[@alexanderzippel8809]

Absolutely, all it would take to move parts of a galaxy out of its normal orbit is a black hole floating through the universe and coming close to the galaxy

[@principleshipcoleoid8095]

Black holes do lose energy due to Hawking radiation

[@jakemeyer8188]

Edit: Our universe is *locally flat

[@mehwhatever9726]

How likely is it for a star system to get injected from a galaxy and become a rogue star while still preserving all its planets?

[@WorldbuildingCorner]

The short answer is, not likely. The objects that form the Galactic Nuclei have such enormous ranges of gravitational influence that they keep everything confined inside. Rogue stars outside of galaxies are not common. The longer answer is, unlikely but not impossible or unheard of. The most likely scenario for this to occur is during a collision event between two galaxies, where stars and systems get jumbled around between the two galactic nuclei. It's expected that in most cases, solar systems would not be internally affected. When the Milky Way collides with Andromeda, it's expected that our solar system won't change. So any planets orbiting your star in question probably won't be affected and will still orbit the same star. Some solar systems may get ejected from a galaxy though if the gravitational disruption is great enough. This is rare but certainly does happen, and we have noted real life examples of this.

[@delegea6538]

I'm gaining braincells just by watching this!

[@vantuz8264]

Ah, i see. You're one of those flat-Universers.