More Oumuamua Strangeness

More Oumuamua Strangeness

With the current passage of comet borisov
through the solar system studies of that object, the second interstellar object to be identified,
are proving that despite being from somewhere else in the galaxy it’s not that different
from a run of the mill solar system comet. This deepens two mysteries, however. The first is why we haven’t seen an interstellar
comet before. Scientists have been studying and tracking
the orbits of comets since the 18th century and Edmund Halley. Up until now, no comets were found to be on
a hyperbolic trajectory, or moving too fast to be bound to the sun. This led to some thinking that perhaps the
interstellar medium somehow erodes comets and they just don’t have any volatiles left
to flare up, and thus would be difficult to spot. Yet, Borisov seems to be a normal comet forming
a tail and a coma as they do. So, why haven’t we seen an interstellar
comet until now? Was it just the luck of the draw, or is Borisov
actually the odd comet out, and interstellar comets usually don’t flare up, making Borisov
a rarity for how normal it is. But if borisov is the norm for interstellar
comets, something we’ll know fairly quickly as there are many people looking to spot interstellar
objects these days, then that serves to deepen the mystery of the first interstellar object
ever found. Oumuamua. In a paper by Eirik G. Flekkøy and colleagues,
link below, they detail one possible, but very bizarre, scenario for the behaviour of
Oumuamua. The crux of the issue is that Oumuamua did
not behave normally as it passed through the solar system. It accelerated on its way out, or perhaps
more accurately it didn’t slow down enough on its way out. This would not be unheard of for a comet,
volatiles outgassing from a comet can give it a push. The problem is, no such outgassing was seen
with Oumuamua. So, it does not appear to have been a comet. That leaves radiation pressure as an option,
but oumuamua would have had to have been very thin and flat. And oumuamua was sufficiently strange in its
over all behaviour that the idea that it might be an alien light sail was floated. In this new paper however, there is now another
option. That oumuamua is more like a giant snowflake
of sorts than a light sail. To come to the conclusion that Oumuamua is
being pushed by sunlight, a density has to be assumed. To do this, they assume that it’s of a roughly
normal density, like ice or rock. This paper takes the opposite approach and
shows that Oumuamua may not be dense at all. Ridiculously so, it’s far less dense than
air. It would not be a solid object. But it may not have to be. The paper details another option. If a star system that’s very young and still
sporting a disk of material around it, it may that it could form an object like this. In areas of that disc that are very far out,
grains of dust and ice can form what’s called a fractal. Such objects can be mostly empty space, and
can have just the kind of low densities that would be needed to be the case for Oumuamua. Modeling of fractals in star systems backs
this up, showing that they can grow to the size of oumuamua. But there would be restrictions here. The star system of origin would likely need
to be fairly close by, and would have to be a young star with a debris disk. This probably isn’t a very common thing,
so we may never see another object like Oumuamua, and the debate over just what it was is likely
going to remain open for some time. Thanks for listening! I am futurist and science fiction author John
Michael Godier currently wondering if we will see more Oumuamuas and if we’re currently
experiencing an interstellar snow storm of sorts. As if regular Earth snow storms weren’t
enough. Gee thanks universe. Just one more thing to worry about and be
sure to check out my books at your favorite online book retailer and subscribe to my channels
for regular, in-depth explorations into the interesting, weird and unknown aspects of
this amazing universe in which we live.

100 thoughts on “More Oumuamua Strangeness”

  1. I still have some theories that this asteroid was a missile from far away sent to destroy earth but it failed due to many big earthquakes shifting the days lenght by miliseconds which with the years passing it made it fail by a big gap and that it was a hubble disguised as a rock which also failed due to volcanic activity.

  2. My understanding is that this was an asteroid made up of nickel and iron and that its reddish appearance is due to the exposure to cosmic radiation over the billions of years but who knows at this point .
    Unless we devise a plan for a rendezvous with the object we're left to speculate on its composition and actual appearance . I've read several theories as to what it looks like and what it is .

    The fact that it showed no outgassing as it swung past the sun on its way out of the solar system is clear evidence that it's not a comet .
    But as for why it accelerated faster than they thought it would is still an open question .
    I'd really like to see a sample return mission to this object to study it in great detail to determine its actual age and not just a quick fly-by .

    My question is where did it actually come from ? Is it truly an extraterrestrial object or is it a far flung piece of our own solar system that has a long hyperbolic orbit as a result of a previous event that caused this long orbit ?

    It's possible that we have an unseen partner to our sun like a brown dwarf which could account for the occasional bombardment that our solar system has had .

    Either way we have much to learn and we should make this a top priority to understand the nature of the solar system and the future of our world if we want to survive what lays in store for our world and possibly prevent what is surely going to happen eventually .

    We spend trillions of dollars for war and comparatively nothing for our own future expansion and survival .

  3. It seems like we should be seeing more now as our solar system's orbit in the milky way is entering the galactic plane isn't it? It seems unlikely that traditional comets could survive entry into the solar system since it was recently found that the solar system is surrounded outside of the magnetosphere by high temperature plasmas, although perhaps the amount and temperatures of the plasmas surrounding the solar system vary by location, so perhaps it depends on the path of the object whether it would pass through the plasma or not.

  4. It sounds like a good scientific reason hypothetically. Or it could be a calling card of sorts to investigate this phenomenon directly, which we can't. Maybe in 50 years, we could do direct observation of these sorts of phenomenon.

  5. There is a theory that the solar system is passing through the galactic plane which increases the chances of encountering interstellar comets and such. This bodes ill for our civilization.

  6. Expanding on someone else's comment, perhaps we're entering a debris field left behind by the formation of a previous star system.

  7. The gravitational forces would have pulled it apart if it was a giant snowflake, plus I don't think we would have picked it up on our instruments in the first place. Exactly how much did it speed up and from what speed? No one seems to know.

  8. Another random idea: as icy snowballs evaporate (eg from cosmic rays) they might build up shells of non-volatile materials. The result could be eggshell fragments made of clays floating around between stars.

  9. Now that there are clearly interstellar objects approaching the earth.. what does this mean for insurance companies?

  10. Where are our nearest proto-planetary fields again? I can't just say "impossible," but I've got a few thoughts about why these "icy fractals" could not exist in our Sol system:
    -1: Initial vector: if I don't pack a snowball, I can't throw a snowball… and certainly not for light years' distance. The most subtle deviation after the initial release result in exponential changes to said trajectory. How did Oumuamua get enough energy to get here, being such a fragile snowflake?
    -2: Chaotic sheer forces: I understand Oumuamua is tumbling over more than one axis and subjected to the gravitational influence of multiple bodies in the Sol system. How would these, combined with radiation pressure, NOT change Oumuamua's shape into (or shifting between) the cosmic structural commonalities?

    My brain is comparing this to an attempt to blow into a bubble wand in high winds. First, you have to supply the perfect amount of energy to the wand, but that's all for naught if the environmental conditions aren't just right. Butheytheregoesone!– awww… Nope. Didn't make it very far at all before POP!

  11. You realise the Voyagers are going to mess with other civilizations heads in the future.
    They'll just be on the cusp of reaching the Ultimate Equation when a Voyager goes floating by and they just give up in frustration.

  12. "It may be a giant snowflake" wow so this is how liberalism spreads through the universe, infecting planet after planet
    It would explain why it accelerated after seeing earth, the infection was already advanced

  13. These things will probably start becoming a lot more common. As we slowly start to discover that we are already inside a giant black hole.

  14. I would like if thousands of these started burrowing their way into The Earth.
    Then exploding simultaneously eliminating all life on the planet & replacing it with something better.

  15. So are we checking near by star systems in the general direction it came from to see if any of them fit that description? Maybe figure out where it came from exactly!

  16. Its amazing the lengths people, respected academics, will go to account for things they see with their own eyes, but cannot define with their science and narrow minded approach. The simplest answer is usually the correct one. Oumuamua was an alien ship or probe more likely, as it tumbled end over end, not only is its shape all wrong for comet sized phenomena, it exhibited intelligent control. Let's leave that at that. It did NOT behave like an average space rock tumbling thru space. Delve deeper and darker and ethe truth becomes clear as day. But you must be ready to act accordingly when world view shattering evidence outweighs common sense, excuses, lies, and predetermined belief systems. Its enough to drive you insane. Still, i prefer the red pill….

  17. There was a Star Trek The Next Generation about this. It talked Lor into betraying the Enterprise and trying to take over, so be very careful. Hopefully it wont come back.

  18. Still fun to fantasize it's aliens, who fly in a huge rock, because hitting stuff at lightspeed kind of would damage windows.

  19. It looks a lot like the object that the soviet mars probe phobos 2 took its last picture of before becoming mysteriously "lost"

  20. It's just a space rock, shaped like a missile, that adjusts it's trajectory and speed, also fires laser beams. Nothing to see here…

  21. So two different seal team members claim it was an old spaceship that they claim our space force actually boarded 3 months before anyone heard about it!!

  22. If amauamua was so thin, and not dense, and ever other asteroid broke up coming into our solar system why didn't it also?

  23. Here I thought that the sucker was tumbling (about 8 hour rotation). What is the strength of the material being suggested as 'less dense than air'? How did it handle the stresses? When exposed to higher rates of insolation what would it react like?
    Vaporware from NASA is what I see, very, very strong vaporware.

  24. It's coming back? Unless it's reversed directions and heading back towards Earth it's just another rock zipping around the Galaxy. Cool that it came from outside our solar system and got a lot of attention because it came relatively close to Earth, but not that special IMHO.

  25. interesting approach to this dilemma, BUT.. if I remember correctly, there was no IR signature or reflectivity to both sides. wouldn't that preclude ice/snowflakes

  26. end over end tumbling with "random" sideways wobble? – something that decelerated very suddenly into a higher gravity environment. its not a fractal, OK. Its not water either.

  27. We are entering a galactic seasonal phenomena in which our solar system is going through a dangerous place in the galaxy. As our solar system goes through this cycle of circling around the galactic center… historically some interesting geological phenomena has occurred. The extra solar system phenomena might be indicative of a shooting gallery… snow storm… it’s going to be a interesting half dozen eons… lol

  28. Universe = billions of years old. Recorded human history = very few thousands of years old. We haven’t seen much because we haven’t been here long.

  29. If we could launch a craft say within the next few years could we conceivably catch Oumuamua and get actual photographic evidence of what it is?

  30. So what I'm getting is, all those properly dressed spaceman and spacewomen need an outer space flannel shirt or a space parka or a space ski cap? Like, a space tuque / touque / toque … oh, however you spell it, eh? 😀 Space reindeer? Space Rudolph? Space Frosty the SnowSpaceMan and Space Rosie the SnowSpaceWoman? (Spacepersons?) The eager young space cadet now needs space snow boots? And little space ski pants? OK, I guess I'm fine with that. What, hot cocoa in a little squeeze packet like the punch or juice packets, to go with the Tang? OK, good there too. Just as long as you don't forget the space cranberry sauce, we're all good….

  31. John. Can I take you to dinner and then sit and stare at the stars while u shared all your knowledge w. Me??? Pls? I would love to Hear you talk for hours and for me to be able to ask questions
    I think your absolutely brilliant!

  32. Shoemaker Levy was torn apart by the gravitational forces of Jupiter.. but Oumuaua retained its hyper-fragile "fractal" shape as it got slinged by the Sun ? Hmm…

  33. If Oumuamua was made of ice and dust – like a regular comet – but of far lower density, why little or no out-gassing? Unless its albedo was exceptionally high the out-gassing should still have happened.

  34. It seems strange to me that an interstellar rock can be spewed from its host star's orbit many light years away and then to be captured by another star; you would think that it's more likely to miss any star's gravitational well giving how vast the space inbetween stars is. Unless, millions of rocks are bound to leave thier systems.

  35. Great video! We need some space-array-telescopes to be able to image smaller and more distant things, better.
    Was going to ask JohnMGodier, but <200k subs, that feels selfish, so… anyone? Whats the best forum/platform/method to start floating parts of the sci-fi epic I've been working on, to people who might be interested in it? (Obviously, writers will be more interested in their own thing).. also how to do it in a way thats fun for anyone involved, without them wanting to take over and turn it into 50-shades-in-space, without ruining its potential with the big twists/spoilers I have planned, and without someone stealing my ideas and leaving it ruined and useless? Anyone's ideas welcomed!

  36. Planet X is out there in a certain trajectory that is pulling all these "Interstellar comets and or objects into our solar system.

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