Nuclear Engineer Reacts to Universe Size Comparison 3D by Harry Evett

Original Video ‪@AlexEvett55‬ @
Nuclear Engineer Reacts to Universe Size Comparison 3D by Harry Evett

[@tfolsenuclear]

Thanks so much for watching! If you are interested in seeing more size comparison videos, please check out my reactions to Kurzgesagt's videos: Black hole size comparison: kzbin.info/www/bejne/iIezp4lmrr16rLMsi=qMx8fYDDa2M4md2D Travel to smallest substances in the universe: kzbin.info/www/bejne/qpzQiWSYm9hlr9ksi=zr7oyGUS1aLLLnaN

[@bluewhalestudioblenderanim1132]

as far as I know , the largest super-earth exoplanets have a diameter about 2X that of earth . aswell as and about 8X Earth's mass and altho it's theoreticaly possible for a superEeart to be ~3X diameter of earth , . it requires as much rock , minerals and metals as the mass of neptune , and that it's far more likely to develop into a gas giant than staying as terrestrial world

[@vettir]

So, 94 GLY is the radius of the observable universe, adjusted for current location. They just took a rough estimate and doubled that, and were saying it was more than 150 GLY

[@Pkoya_edits]

Hey man,j just wanted to say I REALLY love your content and it helped me go through high school recently. And I want to tell you to take a rest or break from KZbin If you need to, keep the amazing content up!

[@BlitzkriegTechno]

Very nice content, been watching since you started!

[@arnabbiswasalsodeep]

Kurzgesagt has really good videos about the sizes of things. If going small, then there's one till the quantum level & for going up there's a star video & then there's the black hole ones. I dont remember which ones you've reacted to.

[@hukaman88]

Aw come on no Uranus jokes?

[@solid-swank]

Scientists renamed it in 2620 to get rid of that stupid joke once and for all

[@filborg3705]

MetaBallStudios make some rather good videos

[@AzillaKiami]

Day 29 of asking if Mr Folse likes beans even though he already answered

[@crunchyblade6829]

I'll visit this channel in a year and if dont see this same comment year later i will be very dissappointed

[@AzillaKiami]

@@crunchyblade6829If i dont keep doing this i will be disappointed in myself. So this comment will most likely always be here unless i either die, or my computer breaks lmfao

[@nathanpfirman625]

You should try reacting to nuclear related things in fictional subjects like games and shows. For example simpsons, fallout etc.

[@libraryofgurkistan]

He already did, there are some older videos of this on his channel. Would have been a nice idea, though.

[@vettir]

Actually, the average mass of a star in most galaxies is .8 solar masses (and .64 solar radii), so the Sun is above average. We just have some HUGE stars out there.

[@anywhere_but_here]

"its above average" ...sure it is buddy 🤣

[@Cassxowary]

*it’s increasingly utterly important to use our hearts&brains and to start being kind to all kind and stop with this invasion nonsense and take responsibility for (y)our actions.*

[@ExActa]

Whenever I see one of these, I make it a point to boot up Elite: Dangerous and visit as many of these celestial bodies as the time I have to play would allow me. It's fun, though playing the game with mouse and keyboard is an atrocity sometimes.

[@hackbyteDanielMitzlaff]

5:04 Black Holes in those sizes can no longer have ((visible)) accretion discs because their gravity is so strong, that nothing can orbit any longer (in that close proximity together) but everything in reach get's directly pulled in.. ;)

[@Kenshkrix]

That's not how gravity works. Anything in a stable orbit will remain orbiting regardless of whether it's orbiting a planet, a star, or a black hole. While stable orbits naturally decay, this rate is mostly independent of what they're orbiting.

[@hackbyteDanielMitzlaff]

@@KenshkrixThat's absolutely right and correct.. The point is, it can't create a _visible_ accretion disk anymore.. There are possible orbits, still.... but you won't see them heating up and glowing in any perceptible spectrum anymore. ;)

[@hackbyteDanielMitzlaff]

@@KenshkrixI edited and corrected my initial comment accordingly ... thx! ;)

[@Kenshkrix]

@@hackbyteDanielMitzlaff I assume this has something to do with the change in gravitational gradient near the event horizon as a black hole becomes more massive? I've never actually thought about the exact math of accretion disks as related to the size of the event horizon.

[@hackbyteDanielMitzlaff]

@@KenshkrixI can't recount details sadly. But the basics were - as far as i remember - that beyond a certain size, any possible accretion disk is no longer be able to get that dense that it heats up and starts radiating (especially in a visible or even near visible spectrum). Which yes and sorry, essentially means, there might be accreting matter in a probably short lived orbit. But it cannot become/accrete as nearly as dense as it would be with smaller black hole masses. I tried to find some research about that last night, but had to give up at some point. I got this "very bare" explanation at least confirmed by some few astro- and plasma-physicists. Not so many years ago. ;) (yeah i know that doesn't mean sh.. ;) but .... at least i'm confident that the real papers will agree. ;)) Edit: p.s.: Heck i'm actually going to ask said scientist (still in the same irc chat) about it..... ;)

[@Hatsune_mikuxX]

You should watch the all tomorrows video very good about us humans

[@Y0URWiFiOG]

🎉

[@Alice.59]

You should take a look at "How the Universe is Way Bigger Than You Think", it's far better than this one

[@fbiagentmiyakohoshino8223]

that avatar just gave me brain cancer

[@dport9563]

Don't most stars go boom when they fuse carbon.

[@vvbsnahakahsksjao]

Have you ever watched vsauce?

[@KamiNoBaka1]

Fun fact: by some definitions our moon isn't a moon because it's too close in size to Earth. In fact, it technically is large enough to qualify as a planet (not dwarf planet like Pluto, full-on planet), so it's not wrong to say Earth and the moon are a binary planet system. The effect of the moon's gravity on Earth is another point for this being a binary planet system. I feel like if humanity ever advances far enough to build Dyson spheres, the first one will be around a star of similar size to Proxima Centauri. Also, Betelgeuse is 100% pronounced like Beetlejuice. Actually, in the movie, any time you see the titular character's name spelled out (like in the commercial for his services as a bio-exorcist), it's spelled like the star. NGC1277 is actually a galaxy with a black hole at the center. From the size they're giving, though, it does seem like they're referring to specifically the black hole; though they're using outdated data. Modern calculations put it as an order of magnitude smaller that the old measurements. It's currently thought to be about 4 light-days across, which is quite a bit smaller than the measurement they've given. The galaxy is about 52000 ly across. The Bootes Void is interesting, it's a massive approximately spherical area in space containing an extremely low density of detectable galaxies. If the Milky Way were in the center of the Bootes Void, we wouldn't have had the technology to detect the existence of other galaxies until the 1960s. The size they use for the universe is one of the theoretical maximum sizes of the universe, not just the observable universe. There are several different models that attempt to estimate the size of the universe beyond the observable universe, which is why there's a < after it. The number is approximately the result of the largest model, so to current science that's the largest it could be. Doesn't seem to be widely agreed that we actually know how to properly calculate that.

[@waspsandwich6548]

I think in order for something to count as a binary planet the barycenter should be in space. So that would count Pluto-Charon but not Earth-Moon

[@Defhrone]

what I found odd about this video is that it depicted the sun as a yellow star even though it's a white star

[@NileForce2214]

So, let’s say, theoretically, tachyons exist, and they’re a form of radiation. How dangerous would this “tachyon radiation” be? Is it more better than gamma radiation?

[@Takyodor2]

You'd have to assume their properties and dangers as well, since we never measured them. You may end up younger after getting exposed though 😋

[@Cassxowary]

*That was interesting, I like reactions to this… And that’s only what humans have discovered so far, and it’s sadly too much, considering the seeming inability to use heart&brain and learn and be a good human, animal, earthling…*

[@waspsandwich6548]

I wonder if youd ever do a general video that isnt a reaction? You cleaely know quite a bit

[@Briish-ty8kj]

1st!

[@AzillaKiami]

doesnt matter

[@Briish-ty8kj]

@@AzillaKiami I don't mean to be rude, but you have an anime profile picture.

[@AzillaKiami]

@@Briish-ty8kjAnd whats wrong with it? its just art. I mean, you have a british pfp. Whats stopping me from saying "i dont mean to be rude, but you have a british profile picture".

[@AzillaKiami]

@@Briish-ty8kjIts all opinions...

[@vgamerul4617]

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