Near-Collision With Other Star Jumbled Up Our Solar System, Physicists Says

[@SabineHossenfelder]

The quiz for this video is here: quizwithit.com/start_thequiz/1726636782810x324712151026138600 You can create your own quizzes on my website -- it's free! You can also now create a post and subscribe to others. I seem to be accidentally building my own social media platform...

[@Thomas-gk42]

quizwithit👍

[@osmosisjones4912]

Maybe that was our sun's sibling

[@cammccauley]

Hell yes. All day long I’d subscribe to your platform.

[@thomasdowe5274]

It always surprises me to have our Solar System in a 'Horizontal plane,' when it is really in a 'Vertical plane' circling the galaxy 60 degrees, 30 above and 30 degrees below the plane of the Milky Way Galaxy. This 'Spiral' indicates that the Solar System travels by ElectroMagnetic forces, as do all the other stars and systems, as partners of those forces...! :)

[@thomasdowe5274]

Ergo, no need for Dark matter to make that happen...:)

[@blauemadeleine]

These are exciting times. There are so many new discoveries and insights. Your videos are a welcome counterbalance to the "daily news". Thank you.

[@cestmoi1262]

The content of either will be disproven tomorrow and forgotten tree days later. The only thing positive is Sabine's humor. Always worth it.

[@moshemordechaivanzuiden]

The fines should be drastically increased for outer planets who refused to read and obey the manual.

[@EbenBransome]

They've already been exiled a long way from the central heating, what more do you want?

[@yeroca]

Certain members of our solar system have been naughty.

[@standingbear998]

these people think they are the manual, that is up to them what should and should not happen. no longer science

[@barrycook5607]

thankfully I am not an outer planet, I never read an instruction manual UNTIL I screw up.

[@daveh7720]

I don't know about fines, but their warranties were voided long ago.

[@yeroca]

"110 AU may seem like a long distance to you, but that's just peanuts to space." -- apologies to Douglas Adams.

[@steveDC51]

Certainly a bit further than the post office though.

[@MichaelWinter-ss6lx]

The Voyagers are further and still haven't reached the Oort Cloud.

[@yeroca]

@@steveDC51 :D I think it was "the road to the chemist's"

[@petertrypsteen]

For a very rough comparison (in A.U./AU) with numbers from Wikipedia: Mars is at 1.52, Jupiter is at 5.20, Saturn is at 9.53, Uranus is at 19.19, Neptune is at 30.06 and Pluto is at 29.65-49.30 AU.

[@Unknown-jt1jo]

110 AU is big. You just won't believe how vastly, hugely, mind-bogglingly big it is.

[@tomaszstanislawski457]

Stars are usually born in groups so collisions between stars are more likely at early stages of evolution of planetary system.

[@Luxalpa]

They do move in herds!

[@justanamerican9024]

Near-Collision With Other Star Jumbled Up Our Solar System I HATE it when that happens!

[@Iammrspickley]

Good thing it happened a little while ago...if it played out like now, we could go from global warming to incineration in the sun or to a permanent ice age when we fly out of the solar system. But who knows....

[@Mattfreeman89]

But we don't exist without everything that happened, happening exactly as it did?

[@kerickleite4296]

I wonder how jumbled the other system was left, and its whereabouts today.

[@vikiai4241]

Damn! Missed yet again.

[@hamishfox]

This is why I'll never make it as a star, I'm not nearly hot enough. Pretty dense though.

[@donaldbucher472]

A bit more context: Neptune is 30 AU from the sun, the dwarf planets Eris and Sedna close to 100 AU, far more likely to be affected by a stellar flyby. One thing not mentioned, this paper looks like a major challenge to people like Mike Brown and his Planet 9 search, which has been fruitless thus far.

[@obsidianjane4413]

I was waiting for the Planet 9/X or Nemesis tie in/ plot twist. Neither than nor this are particularly valid or useful.

[@spvillano]

Pluto being around 50 AU, so twice the distance from the sun as Pluto, which means further evidence would be a much thinner Oort cloud than other star systems, as 110 AU is pretty much inner Oort cloud. If the flyby happened early on, it'd also likely have lessened the late heavy bombardment. Of course, visualizing the Oort cloud has just a few challenges... :/

[@TheReaverOfDarkness]

No, the planet reshuffling is thought to have happened in the early solar system.

[@hellkr]

@@donaldbucher472 I am actually curious how Mike Brown will respond to this

[@Skank_and_Gutterboy]

It's always been in the back of my mind, "We could find Pluto 100 years ago but we can't find a planet 10 times the size of Earth now?"

[@BenWard29]

Please, no one tell Roland Emmerich about this. He found out about the moon used to be closer to earth and look what we got- Moonfall. We can’t survive another disaster on that scale!

[@BennyColyn]

Someone should tell him about that crackpot idea that the pyramids could have been build as landing sites for aliens. Maybe that could be cool?

[@ulrichmeise3658]

@@BennyColyn Well, at some point we are all bound to repeat ourselves, aren't we?

[@cybore213]

​​​​@@BennyColynIt's already been done in the movie Stargate and the television series based on the movie, Stargate SG-1 and a few spin off series. And maybe some other movies or series I don't know about. Edit: Alright, you got me. I just found out he directed Stargate.

[@williamstephenjackson6420]

Such a stupid movie … but of course, I loved it 😂 (edited to say the premise of the alien hollow moon is silly but nicely done and great cast)

[@axle.student]

I thought Moonfall was reasonable well done. I enjoyed it :)

[@bartomiejkrupa5179]

Thank you! Your work sparked my interest in physics, and I truly appreciate it

[@SabineHossenfelder]

Thanks in return!

[@t.kersten7695]

in the past there was a reoccuring suggestion that our sun could have been forming together with other stars inside a huge gas cloud, as it appears to be pretty common in our galaxy /- universe. this could support that idea of a close distance fly-by of a different star in the arly stages of our solar system.

[@milferdjones2573]

Yes we have Identified a few other candidate Stars as ones likely formed with the Sun in such a stellar nursery. I will add more than one Star influence with none coming quite as close would be possible but additional complexity of the simulation would be massive. A few strange orbiters could be later captured including planet 9 ideas.

[@Skank_and_Gutterboy]

I wouldn't call that crazy.

[@junaidsajid8867]

Pretty colors! Thanks Sabine!

[@benahaus]

A Creationist on here once thought he had us with the gotcha question "Well then, tell me how could the Earth be exactly 1 astronomical unit from sun, or that we just happen to live in exactly 1G environment. Buy the man some time on BRILLIANT!!!

[@nahoj.2569]

Bruh

[@Skank_and_Gutterboy]

I'm convinced. Genius!!!!!!!1!!!!11!!!!!!! 🤣🤣

[@TheWooTubes]

I'm often not sure if people claiming to be creationists are actually physicists messing with people's heads. Some of the insane flat Earth theories seem too sophisticated to have come from the people who spread them. There's a lot of money to be made from owning the copyright on a popular religious text.

[@Weltaz]

Good evening, This is called : "one astronomical unit" simply because we chose this distance (earth-sun) as a unit of measurement and called it "one astronomical unit". Are you talking about the fact that we are in the best place for our planet to be suitable for Life to exist on this Earth? : Simply because if the Earth was not in the right place we would not be here to ask questions. So, the Earth is in the right place for life and life is possible and so Human beings wonder why things are the way they are. The planet(s) those who do not have the right conditions for life to be present : there is simply no one to question it. That is why we can ask this question. it turns out that I believe in God. But reality doesn't care whether I believe or not. The Universe is no different whether I am convinced of something or not and even if I doubt the Universe doesn't change. What truly exists, exists independently of us. This is why science does not contradict God, science contradicts imaginary ideas received through indoctrination. It is amazing how science proves that the Genesis story is true: "let there be light" and we see the Big Bang.

[@zooziz5724]

That explanation of solar system forming in a minute or so, is truly piece of art. Bravo, amazing info explanation, top tier educational !

[@tellesu]

We thought the galaxy was an orderly highway but it's actually rushhour in Jakarta

[@Al-cynic]

Cheers, I needed something new to fret over, when I googled rogue planets some months back, they concluded that there was 'little chance' of us being hit!

[@milferdjones2573]

Yes luckily even being in a galaxy the space between stars especially not near the core is so massive being hit or even near misses rare. See you tube simulation of distance to closest star. When people go on very long drives to show the scale where earth at best a few inches from Sun, Neptune other side of moderate wide field and nearest star a long ten hour or something drive. This why even the merger with Andromeda or near merger is unlikely to effect our solar system.

[@Al-cynic]

@@milferdjones2573 Yes I know all that and yet Sabine rated it a distinct possibility, and pointed to science that it already happened once before

[@DarkskiesSiren]

Last time I talked about rogue planets in an online group, I had some know it all guy tare into me acting like I was crazy that these things even exist. Apparently he knew nothing of astrophysics.

[@man_at_the_end_of_time]

Likely a school teacher,......

[@goldmax1412]

Suppose a passing star did indeed destabilize the protoplanetary disk in the early solar system. But in that case, where is that star now? After all, at the speeds with which the nearest stars move from us, it should not have gone far away (on an astronomical scale), and in the simulation theoretically you can see the trajectory.

[@andrewsuryali8540]

Er, no. The Earth is 4.6 billion years old and this collision happened before there were any planets at all in the solar system. By now that star could be tens of thousands of light years away from us.

[@Thomas-gk42]

Intersteting content, as usual on your channel, thanks. That maybe could explain the large variety of extrasolar plantetary systems, but wouldn´t it make a perfect earth like planet much more unlikely? Hihi, no instruction manual in the galaxy...

[@SabineHossenfelder]

I think the issue with the "earth-like" planets is that the more details you add, the less likely you're going to find another one that fits the bill. It's like the problem with "extreme weather events" -- the more narrowly you define them, the fewer of these there will have been. With a narrow enough definition, every thunderstorm is a "once in a thousand years event". In the end I guess the relevant question is how much does a planet have to be "like earth" to allow for life to flourish?

[@Thomas-gk42]

@@SabineHossenfelder Yes indeed, thank you for your time to explain.

[@collin4555]

@@SabineHossenfelder Indeed, with a specific enough definition, even Earth isn't earth-like anymore, since it's changed too much since yesterday, or whenever you set the standard for its conditions.

[@Sonnell]

Would the matter be different coming from a different star? Like its isotopes? Perhaps landing on such an asteroid and collecting samples could answer this theory.

[@woreno]

Universe seems a big billiard game. Impresive update on the solar systen formation!

[@joz6683]

The sun formed in a stellar nursery with many other stars. The distance between them(the individual stars)can be as large as a light year or as close as the width of the solar system planetary disc. This means close encounters, capture and exchange of various bodies and even life via Panspermia is possible.

[@obsidianjane4413]

Life, not likely at all in an alternately extreme cold with brief moments of extreme heat and high radiation environment. Stellar nebula is quite good at sterilizing and even resetting the "clocks" on isotopes.

[@silvergreylion]

@@obsidianjane4413 What do you mean by "resetting the clocks" on isotopes?

[@cefcephatus]

I've never thought if orbiting speed determines planet's composition before, it makes sense in fluid mechanics, but it just a new concept for me in astronomy.

[@GaryBickford]

Collision dynamics, especially in fluid or semi-fluid media, can easily cause some portions to go in any random direction. A collision between bodies that are on highly elliptical orbits could cause some parts to end up in retrograde orbits. I'm not saying these folks are wrong, only other possible causes could exist. An important factor would be the relative prevalence.

[@patrickdepoortere6830]

Love where you're going with your hair...need a bit more length / volume. Still think that wind blown look is optimal heat / hotness. The science news is pretty ok too...the quiz is a great idea. Going there now!

[@SynthRockViking]

That’s when planet Atlantis got flung Queue, sci-fi movie saga

[@mikelistman5263]

Really interesting. Thanks for sharing the finding (cool idea for the study, too).

[@antiHUMANDesigns]

Well, this sounds like a very testable hypothesis, since stars don't just disappear. We should be able to find the specific star that nearly collided with ours. (And give it a ticket for reckless driving.)

[@man_at_the_end_of_time]

Likely 4.6 billion years ago.

[@LeopoldoGhielmetti]

That star had the time to go around the galaxy a dozen times and the Sun too, in different directions. So that star is somewhere in the galaxy but we have no idea of the trajectory, it can be any star that we can see on the sky but maybe it's a star that is currently on the other side of the galaxy and we have not seen it and we are not able to see for the next billion years. For now that star can be easy, no one can fine it for the near collision.

[@paulgoogol2652]

yup. just build a time machine

[@antiHUMANDesigns]

@@LeopoldoGhielmetti Do some stars really move that much faster around the galaxy? Seems stars move mostly at roughly the same speed. But if so, I agree that's a big problem.

[@thomasreedy4751]

@@antiHUMANDesigns Considering the Andromeda galaxy will collide with the Milky Way in 4.5 billion years, there is probably no real requirement that the other sun was born to the Milky Way. Which is why I suspect Rogue suns and planets were mentioned.

[@MCsCreations]

Very interesting indeed! Thanks, Sabine! 😊 Stay safe there with your family! 🖖😊

[@WonkyWiIl]

Thank for a great explanation of this procesd

[@ronm6585]

Thanks Sabine.

[@harbinger6562]

Good morning Sabine ♥️🇩🇪🦾😇🌹

[@dw620]

Scale this up further and the hypothesis of galactic collision affecting the chance and distribution of planet formation once used as a plot device by SF authors such as EE Doc Smith in the 30s-50s that was once derided by scientists has had at least in part volte-face by the same; see "Galactic crash may have triggered Solar System formation" on the ESA's website from 2020, for example.

[@alexhigginbotham8635]

"vague idea" = 'concept of a plan'

[@jacoballessio5706]

🥺 👉👈

[@Razmoudah]

Isn't that how the best anime heroes operate?

[@lackofeffortfpv7412]

Well, a vague idea can be a non sequitur and that it’s not attached to any system of thought whereas a concept of a plan will have an internal logic to it at least

[@lackofeffortfpv7412]

So like a non-seer would be like one of those points in that animation with no context as to position

[@atomicsmith]

The Star we now call Saturn and it upset the Sun-Jupiter binary. This is why Saturn has rings, and Earth/Mars have water from the Saturn system.

[@willernst2721]

You know, physicists can throw as much math and theory at me as they want but the south pole of that ringed weirdo makes me think we actually know absolutely nothing about much of anything.

[@atomicsmith]

@@willernst2721 They still base everything on Eddington’s model of the sun, even though it hasn’t predicted a single observation of the sun in over a century. Notice that most of astrophysics has shifted to conjecture of extremely distant phenomena. It’s so there’s no chance observations will prove their conjectures are baseless.

[@willernst2721]

@@atomicsmith more then a few years back now I went diving into science pretty hard and what I found after being really amazed for a bit was that a bunch of people were guessing about other people's guessing and if you start pulling at any of it the whole house of cards comes down. Don't get me wrong, we have learned some stuff through the scientific method, and math can be used to describe and even predict a lot of useful stuff. The thing is, and even Sabine would agree with me at least when it comes to string theory, that when it comes to theoretical physics you can make up math to prove just about anything if that math isn't based in reality. This video is about some scientists running a bunch of computer sims based on guesses and then math to prove their guesses until finally they came up with a model that almost kinda but not really matches something sorta resembling some guesses about the early solar system. Truthfully, after diving into science and unlearning what I leaned in school, learning some really cool tricks with light that are literally done with smoke and mirrors and enough math to give me a headache, (and don't get me started on that stupid cat in a box), I just gave up and asked God. He told me to read the Bible and I have been doing that ever since, well that and still watching science videos and shaking my head.

[@allangibson8494]

Jupiter is 1/4 the mass for fusion to occur. Physically brown dwarfs are however about the same size as Jupiter…

[@doublepinger]

We already have anomalies in our sun, making it 'calmer'. It's alarming we might be the "only ones", from a particular collision of 2-3 galaxies.

[@axle.student]

I have for the most part had the tendency to view most of the universe and cosmology (physics) like a billiard ball table. The balls bounce off each other in a somewhat predictable way toward the pockets. But the pockets (outcomes) are not exact size and offer some room for error with the outcomes often being the same (predictable) withing that allowance for error. There is always a degree of "uncertainty" in the level of the table (the level, stability of the universe) so as much as it is correct to predict an outcome for the angle of the ball bouncing into the range of that pocket and then collapse into discrete outcome it is never guaranteed in every case. Sometimes the ball will hit the side of the pocket and bounce off due to uncertainty not giving the predicted outcome. > This is an analogical universe (a wave) that is an irrational number. But analog does contain logic and will collapse into discrete outcomes within an error range, but the infinite degree of uncertainty always remains. When you digitalize that universe you loose the error, noise, uncertainty that is the fundamental magic of the universe :) > Not a physicist, just my long term educated thoughts on the matter :)

[@JarkkoToivonen]

Thanks again for enlightening us of new theory doctor Sabine.

[@andonel]

This community is great and you're lovely!

[@victotronics]

Velikovsky was right after all!

[@soaringeagle5418]

Our star started out in an open cluster. Lots of similar stars in close proximity.

[@Andy-o2f]

Great research, great presentation.👍

[@Markfr0mCanada]

If I'm not mistaken our sun formed out of the remnants of a previous star's supernova. A close fly-by in it's early life is not at all strange in that case, as the other star was likely a sibling to our own.

[@meierandre1313]

A video about the formation of the solar system would be very interesting.

[@shadowdragon3521]

Have physicists come up with an explanation for why Venus has retrograde rotation and Uranus rotates on its side yet?

[@michaelstiller2282]

Electric Universe has had a proposal for decades. This video suggests that nearby stars caused chaos in our solar system. EU describes a scenario. Where a brown dwarf star enters the solar system, and becomes Saturn. And with it came Earth Mars and venus. Brown dwarf stars, come a variety of spectrum. The difference between a gas giant and a brown dwarf star is still being defined. All the planets listed except for Venus. Share common rotational axis. Its assumed venus had a close fly by of another planet which discombobulated its rotation.

[@TysonJensen]

They were probably each hit by something, but figuring out what those things were... well, that's complicated. We haven't even figured out for sure where the Moon came from -- probably Earth was hit by Theia but what the heck is a Theia? We don't really know exactly what it would have been made of, and there are scientists who think the collision never happened and the Moon just pulled up and parked itself in our orbit somehow. With no good explanation of the somehow. Some things science is very good at explaining, but stuff in space not so much. We'll need to have more than just the occasional JWST if we really want to get good at figuring these things out.

[@laurencecox2657]

Or Triton has a retrograde orbit around Neptune.

[@throckwoddle]

So were their models just looking for a single event which caused the status quo? Because presumably there would be a huge number of multiple event scenarios which would also be near perfect matches.

[@dewyakana1543]

Interesting, Sabine. Mahalo.

[@Ollerismo]

So we are not a typical solar system?

[@silvergreylion]

Correct. This solar system is quite unique.

[@GarrickHolmed]

Nobody knows because In our section of the milkyway stars are very far apart. Why would it be rare though?

[@overcomingobstaclescreates1695]

@@GarrickHolmed Most other star systems we've observed don't have inner rocky planets in stable orbits with gas giants further out. Some may have had inner rocky planets at one time, but they've likely been sucked into the star's gravity. Many have super-sized gas giants orbiting very very close to their host star. Our system is quite unique indeed.

[@GarrickHolmed]

@@overcomingobstaclescreates1695 I’m sorry but You actually don’t know what you are talking about in this particular case. The reason so many gas giants have been found around Mostly M type stars is because they are easy to detect. See they are big and move rapidly around the host star marking a huge blimp as it dims the host star. Here are some educational links that will help you learn so you don’t tell other people what you told me. They are links to A NASA article and National radio astronomy Observatory article. From the NRAO article!! In fact, a recent study using the Kepler telescope estimated that 22% of Sun-like stars contain Earth-sized planets orbiting their stars in their habitable zone. See you weren’t informed but everyone is uninformed about something! Hopefully these links will work and you read them so you get up to speed! Answer: In fact, a recent study using the Kepler telescope estimated that 22% of Sun-like stars contain Earth-sized planets orbiting their stars in their habitable zone. Answer: In fact, a recent study using the Kepler telescope estimated that 22% of Sun-like stars contain Earth-sized planets orbiting their stars in their habitable zone. public.nrao.edu/ask/number-of-sun-like-stars-with-earth-like-planets/#:~:text=Answer%3A%20In%20fact%2C%20a%20recent,stars%20in%20their%20habitable%20zone. PNASwww.pnas.org › doi › pnas.1...Prevalence of Earth-size planets orbiting Sun-like stars science.nasa.gov/universe/exoplanets/earth-like-planets-more-likely-around-sun-like-stars-than-red-dwarfs/

[@GarrickHolmed]

@@overcomingobstaclescreates1695 It’s not see! science.nasa.gov/universe/exoplanets/earth-like-planets-more-likely-around-sun-like-stars-than-red-dwarfs/ I just wrote you this long message and it disappeared so hopefully this one doesn’t and you read the article.

[@vikiai4241]

This is exactly why you should always check your aim before firing off a star.

[@danpatterson8009]

Playing with a simple 2D orbit simulator shows that given an initial distribution of planets orbiting in opposite directions around a star, over time one direction will come to dominate. Collisions and near-misses can result in planets combining, or falling into the star, or being flung out of the system altogether. Ultimately what's left is a small number of relatively large planets orbiting in the same direction.

[@Xeno_Bardock]

Our Sun is so large it will capture any dwarf star into orbit and turn it into a gas giant with cometary mass loss and electromagnetic interactions with the Sun. Except for Jupiter which formed with the Sun, rest of the gas giants were dwarf stars that were captured by our Sun. Lost mass became the many moons orbiting the gas giants. Difference in axial tilt is how we know which planets Sun captured. Star Proto-Saturn video talks about it. Stars and planets that formed together often closely share their axial tilt. History of solar system is very different.

[@wout123100]

zero proof of that theory, its way too unlikely

[@TheShootist]

You and Wonderful Anton need to co-ordinate the timings of your vids.

[@georgelionon9050]

So no only rare earth, but rare solar system too..

[@ahoksbergen]

Yes, we are fragile and special. Waiting for you to see.

[@chriswatson7965]

I guess the next interesting question that might be able to follow such work is the probabilities of an earth like planet in a range of different star systems. It would also be interesting to see if the range of identifiable exoplanets fit a predicted pattern.

[@philiphumphrey1548]

I doubt you would see a "rogue" black hole coming until it got quite close. The only giveaway would be small flashes of radiation as it absorbed dust particles and perhaps its ghostly faint Hawking radiation. And the tiny distortion in the star background due to gravitational lensing.

[@gregoryclifford6938]

What I see as really peculiar is, not that a passing star’s attraction drawing of a normally distributed cluster or cloud of our solar system, like a mosquito swarm or top cover fighter aircraft in pursuit, nor of a vacuum cleaner in a room filled with sawdust. Gravity is drawn to matter, not by thinning-out the local cloud that must fill in, but in increasing density as it’s drawn near. Its lines of flux, to borrow a figure of speech narrow and focus in increasing strength in closing proximity. That suggests that matter and gravity are one. That attractive force or whatever is like a magnetic, where condensed matter is drawn along in a greater inflow to a larger mass concentration, yet being sustained by its own surrounding field. If the Higgs Field condenses like rain droplets from an ocean of ambient gravity, from whence did it come into being? What change initiates such precipitation formation? A dew point for Higgs bosons? Weird. But coming out of gravity and forming lumps in the gravitational gravy seems as though there ought to be a polarity imbalance within matter and without. I’m left to ask whether steel has any measurable change when it becomes magnetized? On the quantum scale it does, doesn’t it? No polar opposite of matter is known, such that gravity would flow as does the field of a bar magnet? No repulsive opposition in like states of gravity. A bar is magnetized with current applied, and dispersed by disrupting fields in iron. The characteristics of iron atoms are nearly unique and I’m sure that’s been defined to death by now. But all matter is not unique and it permits gravity to enter all things, which must say something of its size, if it has one, its current and stream if it doesn’t. Is more gravity being produced to replace that consumed or drawn into atomic strength and excitement? What happens to lost particles that radiate from too much mass and gravity or anything else? It just floats across space and time, so widely dispersed that it becomes lone specs in light years of volume? Light traveling from a Big Bang event is still waiting for a center of mass to draw it in? Gravity surely is integral to earth’s protective magnetosphere, but also to the solar wind that challenges it. Will gravity be forever concentrated in black holes at the expense of densities elsewhere? Is this a zero-sum game, or is our blackened blanket beyond our universe able to sustain an endless supply of polar opposite gravity to feed our hungry matter machinery? If gravity is attracted to condensed matter, is that in opposition to a repulsive nature of like gravity beyond? Or is our universe a closed-loop system where once set in motion like a mobile sculpture, its balance and reactions will continue in a true perpetual motion machine? Unlike a rock rolling downhill to its rest, or a human to his grave, can this cycle bloom and whither in cycles like seasons and ice ages? How many Big Bangs can there be until all is settled? If something makes a Higgs precursor, I think we ought to learn it. If that’s purely God’s thoughts made into fact, I’d like to know how that all works. It would say a lot about who we call God, and Sabine will have to scratch some major assumptions, that is, if it’s not Russians and Maoists listening to her prayers.

[@merrymachiavelli2041]

Relatively close-passes of the Sun and other stars are still more common than people realise. Gliese 710 is expected to pass within 0.1663 light years in 1.4 million years. Given that's happening relatively soon, and we know of other stars that passed within

[@Nullpersona]

How exactly would humans detect a low or no albedo rogue celestial body at a high relative velocity on a collision course with the star system, let alone home planet, decades ahead? Something relatively small on a cosmic scale, thermally neutral, and dark to current sensors, intersecting at a modest relative 5 million km/h could reasonably arrive without much fanfare. Even microlensing can't cover all angles without a significant investment in an array of telescopes, and relies on a fleeting coincidental passive observation window to get brief hints.

[@dkbros1592]

The beautiful leela of shre Hari creation such perfection of this Maya

[@storsolo]

The animation was beautiful

[@Skank_and_Gutterboy]

It's a smart idea, run a Monte Carlo simulation with thousands of different variables until you hit a model that fits. It doesn't prove absolutely that it happened but gives a good picture of what could've happened. Finding a good candidate star would go a long way, too.

[@TheReaverOfDarkness]

Maybe the gas giants don't form in a random distribution but rather are distributed somewhat evenly. Perhaps long-term habitability requires all of the gas giants to be on the outside, and that can only happen with a star encounter.

[@chaospoet]

I find that 110 AU part interesting as it would mean it entered our section of the solar system as the point where you exit the Sun's Heliosphere into interstellar space is 120 AU.

[@garrett6064]

"The outer planets seem to have more moons than expected." How would this be determined? We still cant see the moons in other star systems with any precision leaving us with a sample of one.

[@b43xoit]

I suppose she meant based on modeling of how a gas cloud would behave based on physics.

[@garrett6064]

@b43xoit I believe she said we can't model down to the planetary scale because without knowing the starting conditions it would be pointless anyway.

[@johnmason8968]

I'd like to be able to plan for "the apocalyptic party " as soon as possible. Danke Schon.

[@asd35918]

Guess I’ll have to check out the paper, but did the simulation indicate which star did the flyby or what happened to it?

[@fluffysheap]

It was 4 billion years ago, so it's impossible to know. The stars have moved around too much.

[@obsidianjane4413]

It exited stage right.

[@ericberman4193]

We didn’t see Oumuamua until it was approximately six weeks passed its perihelion and already headed out of the Solar system. So it’s doubtful that we would detect a large dark planetary object until it was quite nearby making a close pass and already disrupting the Solar system:

[@NYCZ31]

When it was inbound the glare from the sun kept us from seeing it. Thats also a worry when it comes to big space rocks inside the solar system; the glare of the sun might hide it until it’s too late to deflect it from hitting us.

[@dylanburnett7928]

Oumuamua was anywhere from the size of a football field to a parking lot, the fact we saw it at all is impressive. Disruptive stellar objects would be thousands of times larger.

[@ZeroUm_]

​​​@@dylanburnett7928The lower bound of stellar black holes is currently at 2 to 5 solar masses, meaning a Schwarzschild radius of 6 to 15 km. We wouldn't see such black holes coming, other than watching the neighborhood for their gravitational influence.

[@asiamies9153]

@@dylanburnett7928 Exactly

[@EricBerman-vp6pq]

@@dylanburnett7928 You don't need a steller-sized (let's agree that would be the size of the Sun, or larger) object passing through the Oort Cloud, Kyper Belt, and/or inner Solar System to cause orbital disruptions. All you need is a Jovian-sized dark rogue planet or a small, dim, rogue brown dwarf star - both of which are very difficult to detect. Consider for a moment the difficulty of detecting Planet 9, even though Batygin and Brown have discovered/mapped the disturbed orbits of trans-Neptunian objects, the perihelion foci of which "point" to where a planetary-sized object several times the mass of the earth, should be found but which has yet to be observed even with the JWST.

[@sacielo]

uh! wonder if star collisions like this happening at the right time are more likely to host life 🤔

[@1rayemery]

Sabine - I have to ask - sorry - where did you find that revolving observatory dome model...? :-)

[@johnwollenbecker1500]

I will stock up on black balloons just to be ready.

[@user-kq7gi7eh1s]

Please invite me to your apocalypse party! I will turn it into a puff daddy freak off party🤪

[@user-eg2oe7pv2i]

cold apply inward tension , aka incoherent magnetism also apply inward tension . You know the rest .

[@Taomantom]

You always start my day with Knowledge and Humor. You are always a beam of light into the vastness of knowledge.

[@1953bassman]

In ancient times it was believed that the solar system was perfectly orderly, but as more was learned about the movement of planets and other objects within the solar system, it was found to be not very orderly at all. Now, we are considered lucky that everything isn't smashing into everything else all the time.

[@jamescomstock7299]

Star close flybys would be much more likely in a sterral nursery as it usually represents an open cluster in the modern universe. As such such a flyby is less likely now, since we are no longer in the much more star dense space of a cluster.

[@johnpalmer5614]

Love your videos as they are succinct and to the point - very rare nowadays. To me this is an obvious question. WHERE DID THE MATTER COME FROM?????????????? John

[@Shazam999]

Space is big, but there sure seems to be a lot of visitations.

[@rocketraccoon1976]

Can we still sue that other star? Or has the statute of limitations passed?

[@patrickdemichel1765]

I would like to see a video on the subject of limit of calculability of the universe; linked to QC and mathematics

[@babyrazor6887]

Ok I may easily be mistaken but I recall reading that we are not part of the "Milky Way Galaxy" earths solar system is actually part of the "Sagittarius Dwarf Galaxy" which is currently colliding with the "Milky Way". If this is incorrect, please tell me. Can you imagine the formation alterations that occur when two Galaxies collide.

[@NoNameAtAll2]

say*

[@sortasurvival5482]

Had a teach some 16 yrs ago that had a similar theory to explain why planets have such weird spins...

[@janerussell3472]

I CAN'T COMMENT ON RETROGRADE MOTION, like Triton around Neptune; but it might help someone to distinguish Einstein expansion from Hubble expansion. The expansion by the cosmological constant is given to space itself. The expansion of Hubble is an expansion of the Universe. In other words,the cosmological constant affects the expansion of space itself, contributing to the accelerated expansion of the universe. In contrast, the Hubble expansion is an observational phenomenon describing how galaxies move apart within that expanding space. A balloon being blown up with dots painted on it is the usual analogy.

[@Mr.CellophaneHart]

A Pringle?

[@GLF-Video]

Then where is this near miss sun?

[@ConnoisseurOfExistence]

Let's say a rogue black hole travels towards the sun. Let's say it's 5 solar masses (around the smallest stellar black holes possible) and nothing orbits it, so it doesn't currently consume anything. Let's say it's moving at 10% lightspeed. Will we really notice it decades ahead?

[@krustythechris]

'Near-Collision With Other Star Jumbled Up Our Solar System and made it look like a Pringle'

[@Chris.Davies]

Saturn was big enough to stop Jupiter's relentless march towards the sun, and since that system stabilised into an almost 2/5 orbital resonance, these gas giants appear to have been synergistically sweeping nasty inbound objects into far off orbits, saving the inner system from too much harm. I think it's yet another item on the list of Very Rare things in a Very Rare Earth scenario.

[@Jumbohef]

I love your sense of humour brilliance xx

[@gmmaupin]

Where does the energy come from in gradational collapse?

[@FighterFred]

Near collisions are so rare that we are long gone when and if that happens. And in the future, we'll be able to move anywhere relative to the Sun or even leave for another star.

[@Macroscience]

Lovely. Hopefully we coukd do similar experiment of Saturn ring to create micro moons.

[@murraybartley4467]

Not unlikely that a refugee star from the halo, possibly from a dwarf galaxy that merged with our Galaxy, entered the disk in a retrograde motion and passed close to our system. It wouldn't be the first, Kapteyn's star, one of our close neighbours displays these characteristics. It's almost 13 ly away but may have come as close as about 7 ly 10,000 years ago.

[@edwinscheibner7941]

Thank you.

[@Durallan]

There was also that red or brown dwarf that passed really close by like 70 thousand years ago!

[@stevenmellemans7215]

What kind of particles did they simulate? Dust, hydrogen or something else. What forces? Elastic collisions? I still don’t understand how it works. I know it does but there must be an assumption that I miss.

[@_Ramen-Vac_]

Some people never go crazy What truly horrible lives they must live ~~Bukowski

[@pernormann4869]

New fear unlocked... 🤯

[@muntee33]

Yea, 'crackpots' have been trying to tell you this for decades. The culprit is still a part of our new solar system in fact. And is why Saturn exhibits characters and properties which are not fully understood, or compatible, with our accepted view of astronomy and physics.

[@ButUrWrongTho]

The early interaction with a close passing star is one of the aspects of rare earth hypothesis that concerns me most. Maybe life is virtually impossible without a system getting pelted with comets in its oort cloud due to such an event happening early in its life